Experience dependable onboard comfort with the Kuuma Water Heater — a marine hot water system designed for life at sea. With a ~23-liter capacity (22.7 L / 6 US gal) and dual front or rear mounting options, this unit fits a wide range of boat layouts while delivering reliable hot water when you need it most. Kuuma (formerly Force 10) brings marine-grade reliability together with modern efficiency for voyages big and small.

Smart engineering for long voyages

Powered by a 1500 Watt AC element (230 V standard; 110 V option available), this water heater heats quickly and maintains a ready supply. The large heat exchanger paired with a TIG-welded aluminium tank maximizes heat transfer while standing up to the corrosion-prone marine environment. A stainless steel case adds rugged protection against splash and knocks in challenging conditions.

Key features

• Capacity: ~23 liters (22.7 L / 6 US gal)
• Front and rear mounting options for flexible installation
• Electric heating with 1500 W element (230 V standard); 110 V option available
• Large TIG-welded aluminium heat exchanger tank
• Stainless steel protective case
• Certified to the latest Australian standards AS/NZS 60335.2.21-2002 (ESO Approval No. Q080349)
• UL & CE certified, including the marine supplement; ignition protected for safe use on boats
• Spare elements available for Attwood hot water heater compatibility
• Shipped directly from NZ suppliers

Why it matters on board

On a boat, space and reliability are paramount. The Kuuma 23-liter unit combines compact dimensions with a rugged build designed to withstand salt spray and engine vibration. The dual-mount design lets you place the heater where plumbing and electrical runs are most efficient, cutting installation time and reducing clutter. Its ignition-protected certification provides confidence when integrating with your vessel’s electrical system, and the 230 V / 110 V compatibility broadens installation options depending on shore power availability.

Ideal use cases

• Motorsailers, cruisers, and sailboats needing a steady supply of hot water for showers, galley tasks, and hand-washing
• Renovations where existing hot-water cylinders require a higher-performance marine heater
• Owners who value readily available spare elements for quick maintenance on longer trips

Maintenance and practical tips

For optimal performance, inspect the heating element and electrical connections regularly and replace the element with the correct voltage (230 V standard, 110 V option). The combination of aluminium tank and stainless steel case is designed for durability in marine environments; routine checks for corrosion and mounting security help prevent leaks and vibration noise, ensuring quiet, reliable hot water on every voyage.