Kuuma 120V 20 Gallon Marine Water Heater, Vertical 4-Way Mount, Part 11870

The Kuuma 11870 is a 120V 20 gallon marine water heater built for boat installations that need a vertical, 4-way mount configuration. It is part of Kuuma's Premium Water Heater line, constructed with an aluminum tank and a marine-grade aluminum alloy case designed to hold up in the marine environment over years of use. Kuuma water heaters are TIG welded for a durable, leak-resistant build and are the water heater choice of many OEM boat builders, reflecting a level of construction quality suited to demanding marine service.

This unit runs on a 120V, 60Hz, 1500W electrical input with an L1 and N wiring configuration, and holds 20 gallons of capacity. The vertical 4-way mount alignment gives installers flexibility in orienting the unit within available onboard space. It is fitted with a temperature and pressure (T&P) relief valve rated at 150psi and 210 degrees Fahrenheit, and the unit is CSA certified and UL listed to UL174 for safety compliance. Whether replacing an aging onboard water heater or outfitting a new build, the Kuuma 11870 delivers consistent hot water capacity with marine-grade materials throughout.

Specifications

• Brand: Kuuma
• Manufacturer Part Number: 11870
• Capacity: 20 Gallon
• Dimensions: 18.875 inches W x 29.75 inches H x 20.75 inches D
• Mount Alignment: Vertical, 4-Way
• Electrical Input: 120V - 60Hz/1500W
• Wiring Configuration: L1 & N
• T&P Valve Type: 150psi & 210 degrees Fahrenheit, CSA
• Certification: UL listed to UL174
• Case Material: Marine-grade aluminum alloy
• Tank Material: Aluminum
• Weight: 41.2 pounds
• UPC: 014717118705

Frequently Asked Questions

What is the capacity of the Kuuma 11870 water heater? The Kuuma 11870 holds 20 gallons, making it suited for boats that need a larger onboard hot water supply than compact marine water heaters provide.

What mounting orientation does the Kuuma 11870 use? This unit uses a vertical, 4-way mount alignment, which gives more flexibility for fitting it into available space compared to a fixed front-rear mount design.

What voltage does the Kuuma 11870 run on? It operates on 120V at 60Hz with a 1500W electrical input, using an L1 and N wiring configuration.

What are the dimensions of the Kuuma 11870 water heater? The Kuuma 11870 measures 18.875 inches wide by 29.75 inches high by 20.75 inches deep.

How much does the Kuuma 11870 weigh? The Kuuma 11870 water heater weighs 41.2 pounds.

What is the tank and case made of on the Kuuma 11870? The Kuuma 11870 has an aluminum tank paired with a marine-grade aluminum alloy case, built to hold up to marine conditions over years of use.

Is the Kuuma 11870 UL listed? Yes, the Kuuma 11870 is UL listed to UL174 and is also CSA certified through its temperature and pressure relief valve rating.

What is the T&P valve rating on the Kuuma 11870? The temperature and pressure relief valve on the Kuuma 11870 is rated at 150psi and 210 degrees Fahrenheit.

Is the Kuuma 11870 water heater welded or assembled with fittings? The Kuuma 11870 is TIG welded as part of Kuuma's Premium Water Heater construction process.

Is the Kuuma 11870 used by boat manufacturers as original equipment? Kuuma's line of water heaters, including the 11870, is the water heater choice of many OEM boat builders.

What is the difference between the Kuuma 11870 and the 11861 water heater? The Kuuma 11870 is a 120V 20 gallon unit with a vertical 4-way mount, while the 11861 is a 240V 11 gallon unit with a front-rear mount alignment; they are different capacities, voltages, and mounting configurations.