What sizes does the Kuuma water heater line come in?

The line is available in 6 gallon (Part 11811, 11831) and 11 gallon (Part 11841) tank capacities, all with front mount and front heat exchange design.

How do I pick between 6 and 11 gallon models?

Choose 6 gallon for smaller crews or occasional hot water use, and 11 gallon for larger crews or when you need more hot water between heating cycles.

What is the difference between the 11811 and 11831?

Both are 6 gallon front mount units with the same aluminum construction; the 11811 runs on 120V power while the 11831 runs on 240V power, so the choice depends on your vessel's electrical system.

Are all models front mount, front heat exchange units?

Yes, every unit in this line uses a Front-Rear mount arrangement with the heat exchanger positioned at the front, made of aluminum.

What material is the tank and casing made from?

All units use marine-grade aluminum for the tank and interior casing, chosen for corrosion resistance in saltwater and humid marine environments.

What voltage options are available?

The 11 gallon model (11841) and one 6 gallon model (11811) run on 120V - 60Hz/1500W with L1 & N wiring; the other 6 gallon model (11831) runs on 240V.

What T&P valve rating do these water heaters use?

All models use a 100 psi & 210 degree F, CSA-rated temperature and pressure relief valve.

Will these fit in a tight engine room or lazarette?

The front mount, front heat exchange design is built for easier installation and servicing in confined onboard spaces, though the 11 gallon model has a larger footprint than the 6 gallon models.

Kuuma Marine Water Heater - 6/11 Gal, 120V/240V

Kuuma Marine Water Heater - Front Mount, Front Heat Exchange, Available in 6 & 11 Gallon, 120V or 240V

$748.22

Capacity 11 Gallon 6 Gallon

Voltage 120V 240V

The Kuuma marine water heater line delivers reliable hot water aboard powerboats and sailboats, built with marine-grade aluminum construction to stand up to saltwater exposure and constant vibration. Every unit in this line uses a front-mount, front heat exchange design, positioning the heating element and plumbing connections at the front of the tank for easier installation and servicing in tight engine rooms, lazarettes, and utility spaces. Choose from 6 or 11 gallon tank capacities and 120V or 240V electrical input to match your vessel's onboard power system and hot water demand.

Specifications

Brand: Kuuma
Mount Arrangement: Front-Rear
Heat Exchanger Position: Front
Heat Exchanger Material: Aluminum
Tank/Casing Material: Marine-grade aluminum
T&P Valve: 100 psi & 210 degrees F, CSA
Capacity Range: 6 to 11 gallons
Electrical Input Range: 120V - 60Hz/1500W to 240V

Sizes & Options

Match capacity to crew size and hot water usage: the 6 gallon models suit smaller vessels or occasional use, while the 11 gallon model supports larger crews or back-to-back showers between heating cycles. Match voltage to your vessel's electrical system: 120V units wire to L1 & N for standard shore power setups, while the 240V unit is intended for vessels wired for higher-voltage shore or generator power. Confirm available mounting space against the unit's footprint before ordering, since the 11 gallon model is physically larger than the 6 gallon models.

Kuuma Marine Water Heater - Front Mount, Front Heat Exchange, Available in 6 & 11 Gallon, 120V or 240V

Specifications

Sizes & Options

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