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Water Heaters

Marine Water Heaters for Boats and Yachts, Comfort and Efficiency at Sea

When you’re on the water—whether designing a luxury yacht or managing a marina fleet—reliable hot water isn’t a luxury; it’s a necessity. Johnson Pump Marine delivers that confidence with its AquaH™ Marine Water Heaters and accessories. Built with AISI 316 stainless steel for unmatched corrosion resistance and available in 22-to-80-liter (5.3 to 19.3 gal.) capacities, these heaters are engineered to perform in the harshest marine environments.

With dual heating as standard—both electrical and indirect from a secondary source like your engine's cooling system—these heaters are as adaptable as the vessels they serve. And with a limited 5-year warranty, you know you're choosing a product built to last.

Smart Heating for Demanding Marine Conditions

Our marine hot water heaters are designed to integrate seamlessly into both new builds and retrofits. Their robust build, compact profile, and versatile heating capabilities make them a top choice for boat designers, naval architects, and marine engineers alike.

Whether you're looking to upgrade a boat water heater, install a marine hot water system, or source components for a custom build, AquaH™ Marine Water Heaters offer:

  • AISI 316 stainless steel construction for superior durability
  • Dual heating systems: electric and indirect
  • Capacities from 22 to 80 liters (5.3 to 19.3 gallons)
  • Easy installation and maintenance
  • A 5-year limited warranty for peace of mind

Why Choose Johnson Pump Marine for Marine Water Heaters?

When it comes to performance at sea, second-best isn’t an option. Johnson Pump Marine stands apart through:

  • Precision engineering that meets the specific needs of marine professionals
  • Superior material quality, including AISI 316 stainless steel tanks
  • Versatile capacity range to suit vessels from small cruisers to superyachts
  • Dual heating standard—electrical and indirect—for reliable hot water anytime
  • Long-term durability, backed by a limited 5-year warranty

Looking to source a water heater or replacement part?

Use our Where to Buy tool to find your nearest dealer or marine retailer.

Frequently Asked Questions

AquaH™ Water Heaters feature AISI 316 stainless steel tanks, standard dual heating, and a 5-year limited warranty—ideal for marine durability and convenience.

Yes. The use of high-grade AISI 316 stainless steel ensures resistance to corrosion even in saltwater conditions.

The heater uses both electrical elements and indirect heating from a secondary source, such as a marine engine or generator cooling loop.

Models are available in sizes from 22 to 80 liters (5.3 to 19.3 gallons), supporting a range of vessel types and hot water needs.

Absolutely. The compact design and range of accessory options make them ideal for both new builds and retrofits.

Yes, a full line of AquaH Water Heater Accessories is available to support custom configurations.

Yes. The indirect heating system can be connected to a generator cooling circuit for added energy efficiency.

Every AquaH™ Water Heater comes with a limited 5-year warranty, ensuring quality and performance you can trust.

Use our Where to Buy tool to locate your nearest authorized retailer.

While professional installation is recommended for optimal performance, installation guides are available, and many marine technicians are familiar with Johnson Pump Marine systems.

PRODUCTS

AquaH Marine Water Heaters
AquaH Marine Water Heaters
AquaH Marine Water Heaters Accessories
AquaH Marine Water Heaters Accessories