The WaterHeater by ITR is a diesel-fired, 120 VAC supplemented, dedicated domestic hot water heating unit that provides both continuous output and storage of hot water. The heater is compact in size, has an integrated 5.5 US gallon stainless steel holding tank, and is designed to be a direct replacement for a storage-only type water heater.
On demand hot water heater
The patented diesel-fired ITR burner combines efficiency with an extremely clean burn. The unit also incorporates a supplementary 1500W 120VAC(or 240VAC) electric element for use when the diesel burner is not desired and shore power is available. When the diesel burner is operating, a continuous output of domestic hot water with a temperature rise of 52 degrees Fahrenheit at a flow rate of 1.5 GPM is available. The 120VAC element operates in a similar fashion to create hot water, but to a lesser degree. To eliminate the diesel burner from running in low consumption periods some domestic hot water is stored in the holding tank.

ITR has taken this innovative idea one step further by designing a complementary, extremely compact, Space Heating Module (SHM) that allows the WaterHeater to perform a third function of space heating. Using the SHM, the user can have the best of both worlds, endless domestic hot water as well as sufficient output, approximately 14,000 BTU/h, to heat over 1,000 cubic feet in the chilliest conditions. No plumbing or electrical changes are necessary to the WaterHeater as all connections have already been designed into the heater itself. The SHM provides the heat by using the domestic water of the WaterHeater as a heat source and then isolating it for the space heating function with a stainless steel heat exchanger. The resulting space heating output is controllable by its own separate zone thermostat.