The OASIS ZEPHYR is a compact all-in-one heater that provides space heating and on-demand potable hot water. It requires less than two square feet of space, and is only 10.5 inches high. It is the perfect choice for smaller C-Class and Sprinter chassis RVs.

The OASIS ZEPHYR’s diesel boiler provides 33,000 True Output BTU, supplemented by 5,000 BTU of auxiliary heat from a 1500 watt electric element which can provide limited hot water and space heating without diesel burner use while under shore power. The OASIS ZEPHYR has the ability to heat four separate thermostatically controlled space heating zones. The OASIS ZEPHYR is able to provide continuous, on-demand potable 120°F hot water at 1.0 GPM flow rates, and has an internal mixing valve to set hot water temperature preferences. The OASIS ZEPHYR uses an engine waste heat management feature to provide heat and hot water without using the diesel burner, and has an optional engine pre-heat pump to avoid cold starts.

The OASIS ZEPHYR also offers the option of the ITRTouch™ remote control interface, a state-of-the-art touchscreen remote that allows intuitive operation and diagnosis of the system.

The OASIS ZEPHYR is CSA/UL certified. The OASIS ZEPHYR uses ITR’s patented “no-smell, no-smoke” burner platform. This proven technology is quiet, and clean-burning, and improves safety and efficiency, while also lengthening system maintenance cycles.

Diesel Burner TRUE OUTPUT
33,000 BTU/hr 9.7KW
Auxiliary Electrical Heat
One 1500 watt element (5,000 BTU)
Burner Design
Proprietary ITR low pressure system
Continuous Water Temperature & Flow Rate
120 °F @ 1.0 GPM
Temperature Rise (ΔT) of Incoming Potable Water
60 °F
Coolant Tank Capacity
3.1 US gal / 11.75 L
Fuel Consumption (continuous running)
0.28 US gal/hr / 1.06 L/hr.
Engine Preheat System
Available Option
Engine Waste Heat Management
Available Option
System Voltage
12 VDC
Amperage Draw (running)
6.5 amps
Amperage Draw (circulation pump)
2.5 amps
Amperage Draw (optional engine pre-heat pump)
2.5 amps (if installed)
Amperage Draw (running)
6.5 Amps
Available Heating Zones
Heating Circulation Loops
WiFi Touch Screen Remote Interface
Coolant / Water Connections
1/2” MPT & 1/2” FPT
Exaust Outlet Connection
1.5” Pipe
10.5” H x 14” W x 19” D
Weight (empty/full):
69 lbs / 96 lbs