Aqua-Hot 250D diesel heater

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Aqua-Hot Low EmissionsAqua-Hot Made In USA

Ultra-Compact Hydronic Heating

Highly efficient heating and continuous domestic hot water appliance in one compact efficient unit.


  • -  Fueled by diesel and operated by 12V for off grid applications.
  • -  Available with a 110 electric element.
  • -  The all-in-one design of the Aqua-Hot series results in considerable cost and space savings.
  • -  Single, self-contained unit: Delivers residential-style interior heating using heat exchangers and/or in floor heat with the ability to deliver a luxurious supply of continuous hot water at 110°-120°F at a rate of 1.5 gallons per minute. It’s just like the luxury comfort in a traditional home or high-end diesel motorhome.
  • -  Quiet: Low voltage fans provide an almost completely noise free operation.
  • -  Fast Installs: Heating, domestic water, and fuel supply/outlet ports are located on top of the tank for easy connection access. Integrated mounting tray facilitates air intake and exhaust.
  • -  Easy Operation: Heat controlled by your thermostat and endless hot water by simply turning on a faucet.


  • -  Maximum Interior Heat Exchanger Btu/hr 40,000
  • -  Continuous, Tank-less Hot Water of 110°-120°F at 1.5 GPM
  • -  5 Aqua‐Hot Cozy Heat Exchangers
  • -  Fuel Diesel
  • -  Electric Element - Yes
  • -  Size 11.69"T x 12.45"W x 21.61L
  • -  Weight 84lb (empty) 113lb (full)