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Marine Water Heaters Ultimate Guide: All You Need to Know for Efficient Heating Onboard
Marine water heaters are an essential appliance for any boat or recreational vehicle, providing hot water for various uses such as washing up, showering, and even cooking. These heaters are designed to be compact and lightweight, taking into consideration the limited space available onboard vessels. With numerous options available in the market, it can be challenging to choose the right marine water heater for your specific needs.
In this ultimate guide on marine water heaters, we will explore the different types of heaters available, their features, and the key factors to consider when making a purchase. By the time you finish reading, you will have a good understanding of marine water heaters and be better equipped to make an informed decision on which model is best suited for your boat or RV.
Types of Marine Water Heaters
Marine water heaters are an essential part of any boating experience, as they provide hot water for various purposes, such as cooking, bathing, and cleaning. There are three primary types of marine water heaters available on the market: electric water heaters, engine-connected heaters, and hydronic heaters. Each type offers different benefits and suits specific needs, depending on the boat's size and power capabilities.
Electric Water Heaters
Electric marine water heaters rely on an electric heating element to heat the water. These units are typically connected to the boat's electrical system, either 120V AC or 12V DC, depending on the model. They provide a reliable source of hot water with minimal maintenance requirements. Some popular electric marine water heaters include the Whale 6-gallon Premium Water Heater and the Kuuma 6G 120V Rear Heat Exchange . Electric water heaters are ideal for boats with a stable electrical supply.
Engine-Connected Heaters
Engine-connected marine water heaters use the heat generated by the boat's engine to heat the water. These heaters often feature a double-walled heat exchanger system that transfers heat from the engine's cooling system to the water tank. A popular example of this type of heater is the Whale Marine Water Heater - Premium . Engine-connected heaters are a highly efficient option for boat owners who frequently operate their engines, as they make use of the engine's waste heat.
Hydronic Heaters
Hydronic marine water heaters use a closed-loop system that circulates heated water or coolant throughout the boat's interior. These systems often have multiple heating zones, with individual temperature controls for each area of the boat. Popular manufacturers, like Webasto , offer a range of models to suit different boat sizes and heating requirements. Hydronic heaters tend to be more fuel-efficient than electric heaters, as they use a smaller amount of energy to maintain the desired temperature. They are suitable for boaters who prioritize fuel efficiency and have the necessary space to install the heater and its required components.
Key Features to Consider
The capacity of a marine water heater is an important factor to consider, as it determines the amount of hot water available for use on your boat. Capacities typically range from 6 to 20 gallons, so choosing the right size depends on your boat's requirements and the number of people on board. A smaller capacity may be sufficient for smaller boats or short trips, while larger capacities are more suitable for bigger boats or extended trips.
Power Source
Marine water heaters can be powered by a variety of sources, including electricity, engine heat, and propane. Electric marine water heaters, like the Kuuma 6G 120V , rely on an immersed heating element to warm up water, while engine-powered heaters connect to the boat's engine to utilize its heat. Propane heaters, on the other hand, use a propane burner to heat the water. Each type of power source has its own advantages and drawbacks, so choose one that best suits your boat's setup and your specific needs.
Materials and Construction
The materials used in the construction of a marine water heater can also impact its long-term durability and performance. Many marine water heaters feature stainless steel or galvanized steel tanks, as these materials are known for their corrosion resistance and longevity. For example, the Whale F600 Water Heater has a galvanized steel tank, while the Kuuma 11G 120V is made of stainless steel. It's important to select a water heater made from high-quality materials that can withstand harsh marine environments.
Safety Features
As with any appliance, safety is a crucial consideration when choosing a marine water heater. Look for water heaters with built-in safety features, such as overheat protection, pressure relief valves, and ignition protection. These features can help prevent malfunctions and potential accidents while onboard your boat.
Ease of Installation
Lastly, consider how easy it is to install a marine water heater on your boat. Some heaters, like the Kuuma 6G 120V side mount front exchanger , offer more flexible installation options, making them suitable for tight spaces or corners. Others may have more specific requirements for placement, which can be a challenge in limited spaces. Ensure that the water heater you choose can be easily installed on your boat without requiring significant modifications.
Popular Marine Water Heater Brands
Several well-known brands in the marine industry offer high-quality water heaters suitable for various types of boats. In this section, we will discuss a few popular marine water heater brands to consider for your boating needs.
Kuuma: Kuuma is a trusted name in marine water heaters, offering reliable products designed for marine applications. Their 6G 120V Side Mount Front Exchanger and 11G 120V Front Exchanger SS are popular models known for their durability and performance. Kuuma water heaters come in various sizes and configurations, making it easy to find the right one for your specific needs.
Whale: Whale is another renowned brand in marine water heaters. They produce durable and efficient heaters suitable for boating enthusiasts. The Whale F600 Water Heater , with a 6-gallon capacity and front heat exchanger, is one of their popular models. Whale water heaters are also available in various sizes and configurations to meet diverse boating requirements.
Raritan: Raritan Engineering is known for its high-quality marine water heaters designed to perform in harsh environments. Their 1700 series is engineered specifically for marine applications and offers reliable performance with dockside recovery rates of up to 18 gallons per hour. The adjustable thermostat in Raritan water heaters enables precise temperature control, making them an excellent choice for boaters.
In conclusion, Kuuma, Whale, and Raritan are some of the popular marine water heater brands to consider when upgrading or installing a new system on your boat. Each brand offers a range of products tailored to suit various needs, ensuring that you can find the right water heater for your specific situation. Keep in mind that researching and comparing different options is vital to making an informed decision and getting the most value for your investment.
Maintenance and Troubleshooting
Regular maintenance.
Proper maintenance is crucial to ensure the longevity and efficiency of marine water heaters. Regularly inspecting the water heater and its components can prevent potential issues and costly repairs. Some essential maintenance tasks include:
- Checking and replacing the water heater anode when necessary. The anode protects the tank from corrosion, and wrapping Teflon tape around the threads of the anode can help prevent leaks during reinstallation ( BoatUS ).
- Examining pipe joints and hose connections for leaks. Using Teflon tape or pipe joint compound can help prevent dripping, and hose clamps ensure tight seals on hose barb-to-hose connections ( Practical Sailor ).
- Ensuring proper and consistent supply of gas and electricity to the water heater. Test for stable gas supply by lighting a stovetop burner, and use a voltage meter to check that input to the heater is at least 10.5 volts ( RV Repair Club ).
Common Issues and Solutions
Marine water heaters may experience various problems, which can often be resolved with some basic troubleshooting:
Issue | Solution |
---|---|
Insufficient hot water | Check the thermostat setting and adjust if necessary. Also, inspect for potential leaks in the plumbing system or faulty heating elements. |
No hot water at all | Verify that the water heater has proper gas and electrical supply. Ensure that the heating element is functioning correctly and that the thermostat is set at the desired temperature. |
Leaks | Inspect pipe joints, hose connections, and the water heater tank for any signs of leakage. If a leak is found, applying Teflon tape or pipe joint compound and tightening connections can help resolve the issue. |
Corrosion | Regularly check and replace the water heater anode to protect the tank from corrosion. Use Teflon tape around the threads of the anode to prevent leaks during reinstallation. |
Consulting the water heater's manual and seeking professional assistance when unsure about diagnosing or resolving an issue is recommended. Regular maintenance and diligent troubleshooting can help extend the life and enhance the performance of marine water heaters.
Environmental Considerations
When selecting a marine water heater, it is essential to consider the environmental factors that will impact its performance and longevity. Marine environments expose water heaters to high-humidity, aggressive water conditions, and other harsh factors that can affect their functionality and reliability.
One major concern in a marine environment is corrosion. It is crucial to choose water heaters that have corrosion-resistant components to ensure long-lasting performance. Many top-quality marine water heaters, such as those offered by Torrid , include glass-lined inner tank vessels to mitigate the risk of corrosion and reduce bacterial buildup.
Eco-friendly operation is another important environmental consideration. Look for water heaters that meet stringent energy efficiency standards and provide optimal heat transfer without excessive energy consumption. Additionally, these heaters should have minimal noise output to limit noise pollution in the surrounding marine environment.
Furthermore, insulation plays a crucial role in maintaining the water temperature and reducing heat loss. Marine water heaters with good insulation, like the polyurethane foam used in Sigmar heaters , can still have water heated at more than 80-degrees after 20 hours of shutting off the heating element.
Last but not least, proper installation is key in minimizing potential environmental risks. Ensuring that the water heater has a secure mount on a well-reinforced surface can help prevent potential damage and instability during rough seas, as mentioned by Practical Sailor .
Considering these environmental factors will help guide boat owners in choosing a suitable marine water heater that is reliable, efficient, and durable in the challenging marine environment.
In this ultimate guide , we have discussed various aspects of marine water heaters, from the top-rated models to the factors that should be considered when making a purchase. The 5 best marine water heaters we reviewed, such as Whale Premium Water Heaters and Kuuma Water Heaters, showcase the options available to boat owners.
When investing in a marine water heater, factors like size, capacity, heat exchanger type, and power source are crucial in making the right choice. For instance, smaller boats may benefit from a compact design like the Cobalt Aquatics Neo-Therm , while larger vessels may need heaters with greater capacity.
An efficient marine water heater not only provides comfort but ensures a pleasant and warm experience during long sailing expeditions. Since various models are available on the market, carefully weighing your specific needs and preferences will lead to a suitable purchase that will cater to your boat's heating requirements.
Lastly, proper installation and maintenance of your marine water heater are key to reliability and longevity. Make sure to follow the manufacturer's guidelines and consult professionals when necessary. By taking all these factors into account, you can select and maintain the ideal marine water heater tailored to your unique needs.
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The Best Marine Water Heaters for Your Boat or RV
Written by J. Harvey / Fact checked by S. Numbers
A boat is a pricey investment just like your house. Therefore, it’s natural that you give it the same amount of attention. Equivalent to furnishing your house is getting the right and quality accessories for your boat, of which includes the best marine water heater.
Warm or hot water is essential when sailing as you utilize it for showering and washing up. Just make sure that you get the right heater size so that you can optimize the usage and performance. Unlike residential heaters, marine water heaters don’t consume a lot of energy.
There are numerous marine hot water heaters that you can find. You can avoid confusion by reading this comprehensive review so you’ll be oriented with the important features. Consequently, you can select the most suitable for your boat.
- Works with solar power
- Provides hot water in 5 minutes
- Easy installation
- Doubles the supply of hot water
- Has good-quality parts
- High-quality construction
- Durable
- Has 2-year warranty
Table of Contents
1. Whale Premium Water Heater
2. kuuma 11g 120v front exchanger, 3. whale premium water heater capacity, 4. kuuma water heater rear heat exchanger, 5. bosch 7738004996 electric water heater, 6. ecosmart eco mini electric heater, 7. kuuma 120v 6 gallon water heater, 8. whale f700 water heater, 9. bosch es8 tronic 3000 t water heater, 10. whale 68954 seaward hot water heater, 11. suburban 52747a water heater, 12. whale seaward zxc-f600wcwe water heater, factors to consider when choosing marine water heaters, what is the marine water heater, who makes the best marine water heater, how to install a marine water heater, which water heater is better rheem or ao smith, best marine water heater reviews.
You’ll find this product from Whale which is a part of Attwood in several marine water heater reviews due to its dependability. It’s an efficient hot water supplier in my sailboat. I sometimes use solar power to make it work.
When it’s time to take a shower, I only need to wait for 5 minutes to get warm water. That’s why I call it an instant heater! Aside from quickly turning water hot, it can supply you with plenty of it. To prevent water from becoming scalding hot, I added an automatic thermostatic mixing valve to the outlet.
The installation is easy as I mounted it horizontally. It’s like doing plug and play as everything is a match. No tiresome process is required before reaping benefits from this 6-gallon heater that only requires 120V. It’s a relatively compact water heater. Thus, you don’t need a lot of space for it.
- Produces plenty of water supply
- Easy installation or horizontal mounting
- Compact so it take up a lot of space
- Durable because of its premium components
- Adding automatic thermostatic mixing valve to the outlet so that water won’t be scalding hot
Due to this quick marine water heater, the supply of hot water in my boat doubled. It’s lightweight with fiberglass sheets for insulation. This design allows me to remove the case to minimize the space that it occupies.
I was happy that I am able to connect it to the freshwater cooling system of the boat’s engine. Water heating can be done with 110V AC when the engine is not running. However, it’s recommended to fill and cap the pipe with antifreeze when you let it run with AC.
You’ll find black, white, and green wires that have good quality. If you have the same wires in your boat, it’s easy to connect them. Installation is manageable in my case. I figured out what to do after I saw the parts. It has a nice recirculation system that works in producing hot and cold water.
- Lightweight and space saver by removing the case
- Can be connected to the freshwater cooling system of the boat’s engine
- Has good quality parts
- Has a recirculation system for hot and cold water
- Durable due to its high-quality construction
- Needs antifreeze in the pipes when connected to 110V AC
With the 11 gallon capacity of this water heater, I have enough hot water onboard whenever I need it. I think that Whale is a part of Attwood company as the two-year warranty card is addressed to the latter.
It’s a great replacement for my previous heater even though it’s a tad bit larger. Luckily, the plates can be flattened against the case to make some room. This results in decreasing the depth. Although it’s another task, installation is fairly easy. Screwing down plates and horizontal mounting is not that difficult.
Operating this heater starts with 120 volts or 220 volts. It’s flexible when connecting to power sources as it has extra ports. Thus, there are options for you to plug it into the engine coolant or run off the heat engine. The second alternative works even though the boat is underway and it functions without the help of a generator.
- Provide enough supply of hot water onboard
- Fairly easy installation
- Has extra ports for different power sources
- Durable due to rugged construction
- Ignition is protection to prevent harm and accident
- Has plates that may be a tad bit larger than the designated place
- Water turns hot after 45 minutes
Since the exterior shell of this is composed of marine-grade aluminum, it can last for several years. As I’ve used it for a year with no issues, it’s much better than the other one. I didn’t have to make adjustments as its measurement is similar to my previous water heater.
This has a 6-gallon capacity that never fails to provide the necessary amount of hot water. Thanks to its large diameter and 1,500W heating element! There are other features that I like about it. A high-temperature limiter is present and it has an automatic reset. Also, the circuitry is ignition protected for safe operation.
The heat exchange barbs are found at the back while the fittings and connections are in the front. Installation is relatively easy so I didn’t have to spend a lot of time when going through all the steps. This heater can start working through AC power or engine heat when your vessel is underway.
- Composed of marine-grade aluminum to last for several years
- Provides enough hot water due to 1,500W heating element
- With temperature limiter and automatic reset feature
- The circuitry is ignition protected for safety
- Relatively easy installation
- Works with AC power and engine heat
- Capping off the heat exchanger with anti-freeze so it can supply the needed amount of hot water
Although this is a mini-tank water heater, it has a number of great features. First and foremost, it’s capable of giving off instant hot water as it can maintain the high temperature. It fascinates me because I don’t need to wait for even a single minute. The warmth is good enough for my outdoor showers. I also use it when washing dishes.
It stands out when it comes to the quantity of hot water. Five to seven gallons can be obtained at 98 degrees Fahrenheit.
Be aware that it may be too hot at first and may likely be so for the first gallon. Despite this minor drawback, it can serve two sinks without compromising performance. Also, the recovery rate is fast. With these abilities, I can say that it’s perfect for heating water from distant faucets.
Since this is tankless, the mounting options are not limited. You may place it on the wall, shelf, or floor. In any way you do it, it will always be easy because of its size. The same reason helps me avoid wasting water as I only get what I need. Just like any other RV marine electric tankless water heater, this saves energy as you only heat the water when necessary.
- Gives hot water in an instant even for two faucets at the same time
- Can provide five to seven gallons of hot water
- With a fast recovery rate
- Mounting options are not a limited and easy installation
- Separate warranties for the unit and the parts
- Makes you save water and energy
- The first gallon of water may be too hot
I read some marine hot water heater reviews which convinced me to buy this item. The efficacy of this equipment is not only for household use but onboard as well. Eventually, I wasn’t disappointed. I only need to count seconds to have hot water. Moreover, the performance remains incredible even with a distant faucet.
When onboard, I need hot water to complete menial tasks and quick washing. As such, this heater is a reliable companion. Even my boat bidet with a sprayer became functional because enough supply of warm water came out of it. What’s even better is that this mini tank can give you both hot and warm water.
I like that it’s compact and lightweight with a sleek design and a temperature display. The size of this tank reminds me of a toaster oven. It has pretty good insulation so no energy is wasted. Plug it into a 110-volt outlet and it will start working.
- Heats water in a matter of seconds
- Works on a distant faucet
- Gives water instantly so perfect for quick washing and simple tasks
- Can provide both hot and warm water
- Compact and lightweight with a sleek design and a temperature display
- Has good insulation to not waste energy
- Need to add couplers and tape to secure the connection
Water heaters made by Kuuma are known for their durability. They are made of aluminum to ensure that you can use them for many years. So, I didn’t think too hard before buying this one. My hunch was right as it turned out to be the perfect replacement for the previous heater in my 1985 O’Day 28 sailboat. I’m enthralled by how it perfectly fits into the cockpit locker due to its side mount feature.
Hot water when cruising the vast sea can be both a necessity and a luxury. Thus, I was prompted to get this heater with great abilities. There are two ways to heat water due to its dual-loop feature. It can be done through the boat’s engine and shore power. When the vessel is underway, you can connect it to AC power. You may even use raw power heating.
It also promotes safe operation, especially for gasoline-powered boats. The credit goes to the circuitry that is ignition protected. There’s a limit to high temperatures and an automatic reset. Hence, you won’t be surprised with scalding hot water. Quick recovery is another wonderful ability from its 1,500W heating element.
- Durable and lasts for many years
- Suits old model vessels
- Works with different power sources
- Promotes safety operation
- Quick recovery of hot water
- Uncomplicated installation
- Separately buying the necessary hardware
The need to have a huge supply of hot water made me buy this product. You can get 6 gallons or 23 liters from it. It has a thermostat that regulates the electric heating element while it can also produce cold water if you need it.
When heating water, it can reach a temperature of 140 degrees Fahrenheit. But with the temperature-pressure relief valve, the water can’t get too hot. A bilge pump is also added to stop electricity sparks. Since it can dispense both hot and cold water, its design includes waste management.
You can rely on its durability as the inner tank is composed of aluminum and the exterior is of marine-grade stainless steel. These materials guarantee long-term service and strength to face the rigors of the marine environment. That’s why the manufacturer has the confidence to give a two-year warranty to all users.
The double-walled construction is also great as it protects the freshwater supply from contamination. Thus, I don’t worry too much about the water that I keep in my boat.
It’s convenient to just focus on the same area when working on the tank since the fittings and heat exchanger barbs are all situated in the front. Therefore, both the installation and marine hot water heater troubleshooting are easy. Hold-down brackets complete the horizontal mounting of this heater and it’s done with no troubles.
- Contains a huge supply of hot or cold water
- Has parts for safe operation, waste management, and prevention of contamination
- Durable for long-term service
- Has a two-year warranty
- Easy installation and troubleshooting
- Hot water retention for 10 hours
- Very first water release is too hot
I like this product very much as it’s an effective marine tankless water heater. In just 35 minutes, the entire tank of 7 gallons is filled with hot water! Using it gives me so much ease and convenience. I don’t have to turn it on again and again as the water stays hot.
Installation is super easy since it’s substantially hardwired. I think everyone can do it with no difficulty at all. It can also produce cold water. You may mount it horizontally and vertically. But make sure to prepare enough space for it as it’s not exactly mini. Still, you have the freedom to put it on the wall or the floor.
I mounted it with PEX and once it’s done, hot water came out in just 9 seconds. Thus, it’s right to say that it heats up quickly. The temperature that it handles ranges from 65 to 145 degrees Fahrenheit. I can customize the temperature of hot water as there’s a thermostat swing.
- Can make 7 gallons of hot water
- Easy and convenient to use
- Super easy installation
- Heats up quickly and fast
- With a thermostat swing to customize the temperature
- Energy-efficient even though the faucet is far from the tank
- Prepare enough space before installation as it’s not mini
I bought this water heater to make sure that I always have hot water in my boat. Its 11-gallon capacity caught my attention among several other options in the market. It’s a product of the latest technology so it’s capable of bearing 1,500W.
It has a robust construction to withstand harsh marine environments and corrosion. So, I can rely on it in rendering the same performance through time. It simply means unrivaled durability. I can’t help but be astonished by its double-wall heat exchangers and integrated pressure relief valve. Both of these parts guarantee the security of water inside it and the preservation of heat.
Safety operation is also expected from this tank because of its protected ignition. The last thing that I want is to have a piece of equipment that acts up in my boat while sailing. Thankfully, this water heater gives me peace of mind. There’s a safety control to stop the build-up of unsafe temperatures as well.
- Has a large capacity to not run out of hot water
- Has a robust construction for durability
- With parts that keep and preserve hot water
- Safely operates with ignition protected and safety control
- Needs to be installed by two people as this is a large tank
I don’t go for a tankless water heater if I want more pressure and very hot water. The things that I’m looking for are provided by a hardy tank like this one. Since I sail for a couple of days, it serves me well in providing hot water that I use for showers and washing dishes. This is also an RV marine water heater as it’s mostly used by those who permanently live in RVs.
I was able to double up my hot water supply from 6 to 12 gallons. This tank can be powered by propane and 120 volts of electricity. Although it’s big, I’ve noticed that it consumes less propane and it’s quieter too. Due to the adequate supply of hot water, there’s no interruption when taking a shower as long as the power source doesn’t cease to work.
Before mounting this heater, I flushed it first to ensure that the inside is clean. I did some minor adjustments to the plumbing and it didn’t trouble me at all. It doesn’t take much time and effort to complete the installation. After the assembly, give the cold tap water 15 minutes to turn hot.
- A hardy water heater tank
- With a capacity of 12 gallons which means doubling up your hot water supply
- Can be powered by propane or electricity
- Consumes less propane and operates quietly
- Easy installation to produce hot water in 15 minutes
- Not prone to leaks
- Some minor adjustments on plumbing
When I go sailing, I see to it that I dock my boat before sunset. But, I sometimes spend the night on the waters and return home the next day. Hence, this 6-gallon water heater is just right for my needs. It can be operated by 120 volt AC or engine coolant heat exchange.
To have constant availability of hot water, there’s a thermostat that regulates the heating temperature at 140 degrees Fahrenheit. You may also get cold water from it because of its 1/2-inch NPT.
The inner tank is made of aluminum while the exterior is of marine galvanized steel. With these premium materials, I know that this tank will be with me for a long time. Durability of a water heater is important for me so I have the assurance that it can take care of my boat’s water supply.
Set it up by horizontal mounting and hold-down brackets that are already attached to the inner tank. I did it with ease by myself. You will have to thoroughly check the fittings and heat exchanger parts to avoid any issue. Fortunately, it’s uncomplicated as they are all placed in the front of the tank.
- Can be run by electricity or a boat’s engine
- Has a thermostat that regulates water temperature
- Durable as it’s made of premium materials
- Easy mounting or installation
- With valves for safety operations
- Thorough checking of the fittings during installation
Before buying a water heater, there are two main things that you have to consider. Of course, the size of the heater should match your boat’s size so you have enough space for it. The next thing you have to think about is the number of people onboard. Hold your horses as you can’t just buy a 12V marine water heater if you have a lot of people cruising with you! There are other aspects that you have to ponder as well.
Propane or Electric Powered
Most of the water vessels these days have an electrical system. So, getting an electric-powered water heater is not troublesome. You should know that the heater will always be running without limitations if it’s run by electricity.
When it comes to a propane-powered heater, it has a quick recovery rate even when the temperature is low. You’ll also save on running costs. Some think that electric-powered ones tend to last longer. Nevertheless, propane-powered heaters can keep up.
On the brighter side, you’ll find exceptional water heaters that can be powered by both propane and electricity. So, at any time, you can switch to the power source that suits you best.
Water Heater Size
The water heater should be the right size for your boat. It shouldn’t be too big or too small. If you ignore this matter, it may be bulky for your boat or won’t provide the necessary amount of hot water. If you don’t have ample space for it, go for the tankless type as it’s compact.
Everything you put in your boat is exposed to the marine environment. In this matter, you should consider your boating routine and preference. Experts recommend stainless steel that can withstand all kinds of environmental and weather conditions.
A brand is appealing if it becomes popular due to the satisfaction that it gives buyers. So, settle for a company that has a good reputation and you won’t be disappointed with the quality of their products.
Marine Hot Water Heater Troubleshooting
Be concerned about troubleshooting as it’s important to get the heater fixed in case something goes wrong. Research the product to see if you can handle the necessary troubleshooting steps.
A marine water heater heats water that is used for cooking, washing, or shower. It seems like the one that is used at home but the operating system differs. Hoses are made as connectors instead of pipes .
There are two ways to heat a marine water heater. You can let it run by AC power or marine engine heat. This equipment only needs minimal power as any excess can disrupt ignition. It usually comes as a built-in but selections are in various sizes, patterns, and durability.
Companies become competitive these days. Thus, it’s not only the popular ones that excel in making quality products. Aside from the commonly known Superstor marine water heater and Isotemp water heater, Whale, Kuuma, Bosch, Ecosmart, and Suburban are trustworthy brands in terms of creating marine water heaters.
Most marine water heaters are easy to install. You can follow the steps in the instructional manual but in some instances, you may not need it at all.
You can mount it by the brackets and other hardware that come along with it. Then turn it on and you’ll have water in no time.
Rheem and AO Smith are known as makers of quality water heaters. The former also specializes in crafting air conditioning and air cooling systems while the latter only focuses on water heaters. AO Smith has better customer service than Rheem, which is the primary difference between them.
After reading this review, you know the importance and value of the best marine water heater. It’s an investment with a load of benefits. Hot water is a necessity but it can be luxurious when you’re cruising with your boat. It can make a huge difference in your sailing experience due to the immense comfort that it brings.
“I am James Harvey – founder of Boating Basics Online. It is established with the drive to help out first-time boaters, which are those desiring to explore their way through the water. So if you are new to boating, start from here with me. “
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Camco Fresh Water System Dewinterizer
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Camco Plastic Blow-out Plug
Camco Plastic Blow-out Plug Completely clear your water lines with the Camco Plastic Blow-out Plug. Use this plug for winterizing to prevent your water lines from freezing. Using a blow-out pump to clear your water lines will help extend the life of...
Kuuma 240V 11 Gallon Water Heater - Front Mount, Front Heat Exchange
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Kuuma 120V 20 Gallon Water Heater - Vertical 4-Way Mount
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Johnson Pump CM30P7-1 Circulation Pump
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Kuuma 240V 6 Gallon Water Heater - Front Mount, Front Heat Exchange
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Raritan 20-Gallon Hot Water Heater w/Heat Exchanger - 120V
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Whale 120V 6 Gallon Galvanized Marine Water Heater w/Front Exchange
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When you need hot water while enjoying your boat, you can find a dependable marine water heater from Wholesale Marine. We stock a variety of heaters and replacement parts for leading manufacturers including Camco , Kuuma , and Raritan Engineering . Marine water heater capacities range from 3-gallons to 15.8-gallon tanks and are perfect for supplying hot water for showers, laundry, doing dishes, and other onboard tasks that require hot water on demand. You can rely on Wholesale Marine for quality marine water heaters, replacement, even maintenance components such as bypasses, de-winterizing solutions, drain valves, blow-out plugs, and anode rods-everything you’ll need to keep your marine water heater operating at peak function.
Marine Water Heaters Provide Hot Water on Demand
Need a marine water heater but are tight on space? Consider a Kuuma 120V Front Mount 6 Gallon Water Heater . While it may be small, you’ll find it offers the latest technology and has been manufactured with only the highest quality materials. Tough enough to withstand harsh marine conditions, this 6 gallon unit also conserves weight and footprint on board. If you're searching for a larger capacity marine water heater for showers and washing dishes, consider the Kuuma 120V 20 Gallon Water Heater - Vertical 4-Way Mount . Still compact but large-capacity, the aluminum tank maintains a constant temperature. Kuuma also offers marine water heaters in several capacities, including their uber popular 11-gallon model - a brand known for its reliability and long-life.
Wholesale Marine is well known for the best quality boat parts at competitive prices. This is why our happy customers return again and again. If you need assistance in selecting what part you’ll need, simply give us a call and enjoy our courteous and efficient service. We are boat enthusiasts too, and can help you make the right marine water heater selection. Be sure to ask about our Captain’s Club Rewards Program for additional discounts on everything you need to keep your boat in optimal condition for your next adventure! Call us at (877) 388-2628; we’re here Monday through Friday, from 8:30 AM until 4:30 PM, EST.
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10 Best Boat Hot Water Heaters And Their Reviews For 2022
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So you have a boat, you might need a boat hot water heater for that.
You want to go sail out into the waters but are worried about having hot water to enable you to take a hot shower after a relaxing swim or to do some wash-up.
Just like in our homes, boat owners also feel the need to have hot water on their boats.
Hence will need to install a boat hot water heater unit to facilitate this.
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10 Best Boat Hot Water Heaters Reviewed
There are many water heaters in the market today, some of which have a modern touch while others are still in the bulky traditional designs.
In the boating industry, the water heaters used are usually either propane powered, use electricity, or make use of the waste from the engine to generate heat.
They are made from very high-quality corrosion-resistant material like aluminum steel or stainless steel, their unique design is to make them durable in any water conditions.
1. Whale Water Heater - Premium
The Whale Water Heater 120V is the ideal boat hot water heater.
It efficiently maintains an ample supply of hot water of up to 11 gallons.
With its double-walled heat exchanger system, the whale water heater utilizes the closed cooling system to heat water as the boat is running.
Also, while not in motion, the heater can be run electrically using a heating element that can be connected to the boat power supply or a generator.
To ensure its durability, the heater is made of sturdy materials that are resistant to corrosion.
You can choose a casing material of your choice for this heater, which can either be galvanized steel.
This is more substantial than most but has a longer lifespan; aluminum steel that is epoxy coated and blends well with the features of a boat or stainless steel, which gives it a modern look.
An additional feature to ensure durability is the anode that comes with the heater.
The whale water heater is especially useful for boats that sail in hard waters with high dissolved salt concentration or high currents.
The anodes help to elongate the life span of water tanks by corroding themselves instead of the containers.
They, therefore, need to be replaced as need be.
The heater is ‘ignition protected’.
This is a measure put in place to ensure safety when the heater is being used in the engine room.
It has a pressure relief valve and a drain valve that allow you to drain out water during the cleaning process.
Pros & Benefits:
- It is easy to install and quicker to heat water
- It can run off electric or heat power
- The heater comes with a two-year warranty
- It helps to prolong the lifespan of the water tanks by preventing corrosion
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2. American Standard Electric Water Heater
Second, on the list is the American Standard, a well-renowned water heater brand.
This brand seems to be a favorite among many boat owners.
This is a high-quality brand of water heater that is made to last long.
The heater can operate on gas or electricity.
The American Standard brand offers a wide range of models, each with different capacities to suit different needs.
The interior of the tanks on this heater is made from durable steel—couples with a fiberglass filler, and anodes that protect the tank from corrosion.
The anodes, however, have to be replaced as seen fit since they corrode with time.
Maintenance of the American Standard heater tank is easy since it has a hand hole allowance that allows for cleanup inside the container to remove the residues that build up with time.
The American Standard Water Heater is ideal for boat owners looking to heat a large volume of water on demand.
It has a large storage water capacity of up to 119 gallons of water with a heating element of up to 54Kw.
When it comes to warranty, the American Standard Water Heater is unbeatable.
The heater comes with a warranty of six years, while models with tanks lined with glass have a guarantee of twelve years, the same as the estimated lifespan of the heater.
- It helps to reduce the cost of energy by its ability to retain heat for longer periods
- Has an adjustable thermostat that enables you to regulate the temperature of the water as you feel fit
- The American Standard Water Heater comes with a preset temperature and pressure relief valve
- It is an easy to install point-of-use electric water heater: no long waits for the water to heat up
- The American Standard Water Heater has a superior thermal efficiency
3. Kuuma Water Heater
Kuuma Water Heaters have an excellent reputation among popular boat manufacturers in the industry.
This is a dual powered water heater meaning it can be powered either by electricity or by using engine power.
Therefore, the water heater can be used whether the boat is on the sea or at the docks.
The heater’s casing is made from high-quality aluminum that makes it resistant to corrosion.
Also, the casing makes it excellent at retaining heat.
The Kuuma Water Heater has 11 gallons, which makes it the best for boats that have high hot water requirements.
However, it also has models that have a small hot water capacity of 5 or 6 gallons or a large capacity of 20-26 gallons.
To ensure safety when in use, the heater comes with an ‘ignition protect’.
This is to prevent any hazardous occurrences when in use in the engine compartment.
- Kuuma Water Heaters are easy to install and maintain
- The heater comes with a two-year warranty on the heater
- It is highly effective when using either electricity or engine power
- The heater comes with hose barbs and pipes for domestic water
4. Bosch Tronic 3000 Water Heater
The Bosch Tronic 3000 is an electric mini-tank that is portable hence making it an excellent option for the outdoors as in a boat.
With its compact design and small size, the heater becomes easy to install by directly mounting it on a wall, under a sink or in a cabinet.
Bosch Tronicmodels come in different water capacities.
It is a cost-effective alternative since it operates without a tank.
The water capacity of these heaters could range anywhere from 2.5 to 7 gallons.
However, since the heater is small, you can only get enough hot water for one chore at a time.
The Bosch Tronic 3000 has a recovery rate of 6.8 GPH at about 90 F.
This rate varies depending on how cold the incoming water is.
The water pressure range is about 150 psi.
Although the heater is small, it has been equipped with features superior to other big models.
The Bosch Tronic 3000 is lined with glass that prevents it from corrosion over a long period of use.
The best feature of this model is that it is capable of supplying water to multiple sources simultaneously.
It’s also a good option if you are looking to conserve energy since it comes with a CFC- free form insolation.
It also comes with temperature control to enable you to adjust the water temperature to your liking.
The only downside of this heater is that it needs to be installed close to the hot water outlet.
- The heater comes with a two-year warranty on its parts and a six-year warranty on the tank
- Long lifespan: the tank is lined with glass making it corrosion resistant
- It has a fast recovery rate; hence no long waits between drawing water
- It is a point of use water heater which is fast and reliable: you get hot water as soon as you open the tap
- With this heater, warm water delays or cut out is at minimal
5. Atwood 94023 Water Heater
Atwood water heaters are electric heating units that are highly reliable.
It’s lightweight, therefore makes it easy to install and to service.
This heater is made for an aluminum alloy that makes the storage tank resistant to corrosion hence elongates its life span.
It’s a great feature, especially for boats that sail in harsh weather conditions.
For the Atwood 94023, the hot water capacity is at 10 gallons with a heating element of 1400Kw and operating on 120V.
To ensure that the freshwater is not contaminated, this heater is made using the double tube technique.
To heat the water, the heater uses a hot water coolant.
This is not a point-of-use heater; therefore, you will need to give the heater time to heat the water.
It is, therefore, essential to ensure that the connection between the engine and the water heater is made correctly to prevent damage to the engine.
- Due to its small size, this heater is ideal where there is minimal floor space
- It comes equipped with a factory set thermostat and with a temperature and pressure valve
- Keeps the water warm for a more extended period
- Atwood heaters are effective and resourceful
- The heater is compatible with most motors hence little to no adjustments are needed
- Atwood heaters have multiple safety protections such as temperature-pressure relief valve, thermostats, and a limit switch
6. Stiebel Eltron Tempra 24 Plus
This is yet another small electric heater that has no tank and is great for the outdoors.
This heater can be plugged in on a wall outlet, making it quite flexible and portable.
Its sleek design ensures that the heater can fit in places with minimal available space.
This heater has a flow rate of up to 4.68 gallons per minute, making it a higher performer than some gas heaters.
Since it doesn’t come with a tank, this water heater is considered the best in saving energy.
This is because water is only heated as required.
The Tempra 24 plus comes with a temperature control allowing you to adjust the water temperature to your liking.
A significant advantage of this heater is that two fixtures can use it at the same time.
One of its useful features is a thermostat that allows you to regulate water temperature as you use it.
Likewise, this heater comes with a high-tech flow control system.
This allows the regulation of water to be able to keep up with the demand.
When installed with a qualified technician, the product comes with a seven-year warranty.
- No venting is required
- The heater is small hence making it easy to install and maintain
- Temperature changes are easy to adjust
- Big on energy saving since it uses minimal energy
- Ensures an unlimited supply of hot water
- Since it has no tank, this water heater helps to save on space
7. Water Heater Propane, Camplux Outdoor Portable Camping Gas Tankless Hot Water Heaters, 2.11 GPM,...
This is the perfect water heater for the outdoors with a 10-liter capacity and a 2.64 gallons per minute model.
It comes packaged with a showerhead, a gas regulator, and the required adapters.
Camplux Heater is small, compact, and lightweight making it easy to be positioned anywhere.
The heater is hooked to a propane cylinder powered by D-cell batteries making it the best choice for off-grid locations.
Despite its small size, the heater’s maximum power output is about 68,000 BTUs.
It also has a stainless steel burner and a copper heat exchanger that generates thermal energy efficiently.
Camplux has an energy control point that allows you to save energy when the weather is reasonably warm.
It also has an automatic shut-off switch that automatically switches the heater off when the temperature exceeds the safe levels.
On the contrary, its anti-freezing technology helps to drain out residue water through the drain plug during cold days.
- Its thermal efficiency is very top-notch
- Can work effectively without mains electricity
- Comes with a showerhead and adapters on purchase
- Has a 20-minute automatic safety device
8. Isotemp Water Heaters
On this list, this is probably the most expensive choice, but it is worth it.
The Isotemp Water Heaters are more traditional, a bit heavier, and bulkier than the modern heaters.
It is the best choice if dealing with harsh water conditions.
These heaters are lined with a eutectic solution that enables water to remain warm for a more extended period.
Isotemp water heater is known to heat water to a temperature of up to 145F in an hour.
The unit can either be mounted horizontally or vertically and banded by two steadies, one on each side to help support.
This makes it robust when installed.
Additionally, the heater is made from stainless steel, which protects it from corrosion through hard water or harsh weather conditions.
The stainless steel casing is used for both the tubes and tanks, as well as any other part that might come into contact with water.
The Isotemp water heaters come in different sizes with a water storage capacity ranging from 4 to 6 gallons.
It has an immersion heating element of about 750W to 1000W and uses heat from the engine’s coolant to heat the water.
- All models come with a five-year warranty
- The polyurethane insulation helps preserves water temperature for long (up to 24 hours) hence the best when you want to use water without having to reheat
- Comes with a safety relief valve
- The water inlets and outlets in this product are carefully designed to minimize the mixture of hot and cold water
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The Raritan Water Heaters another famous brand in the boat water heater manufacturing industry.
These heaters are specifically designed for water machines.
At the price it comes in, this product works reasonably well.
Unlike the older model, the new and improved model of the tank is glass-lined with steel.
It, however, needs the support of anodes to prevent corrosion to the tank.
Raritan Water Heater fittings are galvanized while its tank is lined with a black foam sheet on the outside.
It comes with an adjustable thermostat that enables you to regulate the water temperature as you feel fit.
The heater has ignition and thermal overload protection to prevent any hazardous occurrences from happening.
It has a heating element of 120V with a water storage capacity of 20 gallons.
- The heater is quick at heating water
- The heater comes with a five-year warranty
- Raritan Water Heaters are environmental-friendly; they have a CFC-free foam insulation
- All models come with a five-year warranty on the tank and a two-year warranty on the heater
- It is simple to install and has a design that makes it compatible with many pressure systems
10. Whale Seaward Water Heater
The seaward heaters are made with stainless steel in several parts that are carefully joined together.
The plumbing pipes are galvanized while the tank is insulated with fiberglass, which protects it from corrosion.
This heater has a switch used to switch off the heater once the water temperature gets high.
It operates on a 12OV heat exchanger.
The Whale Seaward Water Heater uses a combination of both electric and heat exchangers to heat the water.
The seaward water heater has a water storage capacity of up to 11 gallons.
For safety, the heater has an ‘ignition protection’ to prevent any hazardous occurrences from happening when the engine is running.
- This water heater has a large drain valve to drain residue during cold days
- It has brackets welded on the tank to make it sturdy when mounted
- This water heater comes with a temperature relief valve
What To Consider When Choosing a Water Heater
Shopping for a water heater can be quite confusing and overwhelming.
There are many different types of brands and models available in the market, each with different specifications, build, capacity, and power.
A water heater can either make or break your boat ride experience.
A few things to keep in mind when planning to install or upgrade your water heater include:
With all the above considerations.
Choose a heater that fits your needs and is within your budget.
Although, it is best to note that with water heaters, the lowest cost is rarely the best value.
This is important as it helps to ensure the product works as intended.
The higher the warranty duration, the better.
How much available space you have on your boat to install the heater.
If working with little space, you might want to purchase a heater with no tank.
Heaters that use less energy are better since the energy supply on a boat is usually limited.
Water heaters can be quite hazardous if not correctly installed, especially when the engine is running.
It could result in a fire.
If not sure, ask a professional to install the heater for you.
Depending on the number of people, you anticipate being having on board regularly.
Choose a heater that can hold as much water as required.
Some heaters are best suited for commercial use, while others are made for small scale use.
Whether the boat is used for commercial use or personal use will determine the type of heater to purchase.
As much as most are highly durable.
You might choose to buy one made from stainless steel rather than one made from aluminum.
This is dependent on several factors, such as the type of water you sail on.
The prevalent weather condition in your region.
Final Thoughts
Nobody likes taking a cold shower.
Especially not on a cold day when you are out in the waters.
Therefore, having a boat hot water heater provides you with a different onboard experience, especially during the cold season.
Whether you are doing the installation by yourself or having a professional fix it for you, the process is quite easy.
A hot water heater installation ensures the storage and redistribution of freshwater within the system of the vessels.
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WHAT IS A MARINE HOT WATER HEATER?
A marine hot water heater is a device used to heat water on boats and yachts. It provides hot water for showers, sinks, and other applications that require hot water.
HOW DO MARINE HOT WATER HEATERS WORK?
Marine hot water heaters work by heating water using a heating element that is powered by electricity or fuel, such as propane or diesel. The heated water is stored in a tank until it is needed, and then distributed to the various fixtures on the boat.
WHAT ARE THE DIFFERENT TYPES OF MARINE HOT WATER HEATERS?
There are several types of marine hot water heaters, including electric, propane, and diesel models. Each type has its own advantages and disadvantages, and the choice will depend on factors such as the size of the boat, the amount of hot water needed, and the power source available.
Electric marine hot water heaters are easy to install, require minimal maintenance, and are generally less expensive than other types of heaters. They are also quiet and efficient, and do not produce emissions.
Diesel marine hot water heaters are very efficient and can heat water quickly. They are also very durable and long-lasting, and can be used in a variety of applications. They are a good choice for boats that have diesel engines and fuel tanks.
WHAT FACTORS SHOULD BE CONSIDERED WHEN CHOOSING A MARINE HOT WATER HEATER?
When choosing a marine hot water heater, it’s important to consider factors such as the size of the boat, the amount of hot water needed, the power source available, and the type of fuel that is used on the boat. It’s also important to choose a high-quality heater from a reputable manufacturer.
WHAT MAINTENANCE IS REQUIRED FOR MARINE HOT WATER HEATERS?
Marine hot water heaters should be inspected regularly for signs of wear or damage, and should be cleaned as needed. The heating element should also be checked periodically and replaced if necessary. It’s important to follow the manufacturer’s instructions for maintenance and care.
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1700 Series Water Heater Temperature and Pressure Relief Valve, 75 psi. WH1A Bolt-on Heating Element with Gasket, 120V, 1250 Watt. 6-Gallon Water Heater with Stainless Steel Case, Front Exchanger, Horizontal Orientation, 120V. 11-Gallon Water Heater with Stainless Steel Case, Front Exchanger, Horizontal Orientation, 120V. CONTACT WEST MARINE.
Marine water heaters can be powered by a variety of sources, including electricity, engine heat, and propane. Electric marine water heaters, like the Kuuma 6G 120V, rely on an immersed heating element to warm up water, while engine-powered heaters connect to the boat's engine to utilize its heat. Propane heaters, on the other hand, use a ...
Marine water heaters are important components for any boat, providing hot water for showers, dishwashing, and other onboard needs. Fisheries Supply, a leading provider of marine equipment, offers a wide selection of boat water heaters and related parts. We carry leading brands like Torrid, Isotherm, or Whale.
This sailboat water heater is reliable in delivering hot water. It warms water in just a few minutes so you won't have to wait too long. 2. Kuuma 11G 120V Front Exchanger. Due to this quick marine water heater, the supply of hot water in my boat doubled. It's lightweight with fiberglass sheets for insulation.
Marine Water Heaters. When you need hot water while enjoying your boat, you can find a dependable marine water heater from Wholesale Marine. We stock a variety of heaters and replacement parts for leading manufacturers including Camco, Kuuma, and Raritan Engineering.Marine water heater capacities range from 3-gallons to 15.8-gallon tanks and are perfect for supplying hot water for showers ...
1. Whale Water Heater - Premium. The Whale Water Heater 120V is the ideal boat hot water heater. It efficiently maintains an ample supply of hot water of up to 11 gallons. With its double-walled heat exchanger system, the whale water heater utilizes the closed cooling system to heat water as the boat is running.
Marine Boat Heaters. Stay cozy and warm on the water with our top-notch marine heaters. Whether you're cruising in a cabin cruiser, living in a houseboat, or enjoying the simplicity of a tiny home, our heaters are guaranteed to keep you snug and comfortable. Take your pick from our diverse range of diesel, propane, electric, or solid fuel ...
12V WATER HEATER. Part no: S360EW. Hot water on-the-go for outboard boats. No generator / inverter / shore power required. Rapid heat up provides hot water in less than 1 hour*. Ideal for use with deck showers - perfect for warming wetsuits. Safety features include low current switching, integrated temperature and pressure valve, thermal cut ...
Torrid Marine manufactures "Yacht Quality" marine water heaters from 6 Gallons up to 200 Gallons, stock and custom models. Torrid Marine Water Heaters (800)722-5123 - US (206)920-9002 - Int'l. Home; ... If our stock marine water heaters don't fit your specific needs, we also build to order several models and configurations designed for an ...
Whale Seaward 6 Gallon Hot Water Heater w/Rear Heat Exchanger - Galvanized Steel - 240V - 1500W. $535.15Regular Price$744.99. Add to Cart. Items 1 - 12 of 51. Page.