Heating, Ventilation & Air Conditioning

EarthRoamer XV-LT’s are  designed to keep occupants comfortable in temperatures ranging from over 100 degrees Fahrenheit to well below freezing.  Maintaining a comfortable interior temperature and humidity in extreme environments is achieved with EarthRoamer XV-LT’s by starting with a well insulated body. EarthRoamer camper bodies feature excellent thermal insulation as well as a radiant barrier to keep solar energy out in the summer and keep body heat inside in the winter. Thermostatically controlled heat is provided with a highly efficient diesel furnace, large  swing out windows and two ceiling fans provide excellent ventilation, and a 110 volt air conditioner cools and dries the air in hot, humid environments.

Diesel Air Heater

A compact, safe and efficient German-engineered diesel fueled heater keeps the interior temperature comfortable down to temperatures well below -30 degrees F. The heater is controlled by an integrated on/off switch and thermostat located on the forward end of the main control panel near the over cab bunk. Hot air is ducted from below the rear wall cabinets as well as into the bathroom.

This heater features multiple heat output levels ranging from 2,900 to 7,500 Btu and air flow rates of 19 – 48 cubic feet per minute. It has its own fuel pump and draws fuel from the aft 40 gallon diesel fuel tank. Both fuel consumption (.026 – .070 gallons per hour) and electrical power consumption (.67 – 2.80 amps) are minimal and plenty of fuel and battery power are available for continuous cold weather operation. These heaters draw combustion air from outside of the vehicle and exhaust gases  are emitted from a muffler and exhaust pipe at the rear of the vehicle. The heater is functional at all elevations and the correct fuel to air mixture is maintained by a continuously variable altitude compensator.


EarthRoamer XV-LT’s are equipped with two built-in electric ventilation fans. The main cabin fan is a variable speed, reversible fan with a rain sensor and is controlled by an electronic control panel located at the forward end of the main electrical panel. The bathroom fan is a three speed exhaust fan and is used to exhaust odors and moisture out of the bathroom/shower.

The main fan is a continuously variable speed fan equipped with a reversible airflow switch (in or out air flow) and rain sensor.  Fan speed can be controlled by manually selecting a fan speed or by setting the desired temperature and the fan will speed up at high temperature differentials and slow down as the desired temperature is achieved. The built in rain sensor closes the dome and turns off the fan blade when the sensor becomes wet and the dome automatically reopens when the sensor dries.  A rain sensor shut off switch and a back up manual dome open/close knob is also provided.

In typical operation in low humidity environments, many owners find that the fan and open windows are more than adequate to keep the camper interior comfortable.


EarthRoamer XV-LT’s use German engineered windows that have integrated blinds and bug screens. The windows are dual pane acrylic and have excellent thermal insulation properties. All windows feature bug-screens and aluminum coated blackout roller blinds which can be clipped together and simultaneously adjusted with only one hand. The aluminum coated roller blinds block all visible light and also keep radiant energy out of the vehicle in hot, sunny weather decreasing the energy required  to keep the camper interior cool in hot weather. Three position  telescopic supports with top hinge mounts enable excellent  ventilation, and keep the interior dry even in a light rain. A security locking handle prevents the windows from being opened from the outside and provides for one handed operation.

Roof Hatch

A large 3 by 2 foot roof hatch is operated with a remote control and opens electrically to a maximum 70 degree angle to provide excellent ventilation, views of the sky and access to the roof. The roof hatch features a dual pane acrylic cover,  pleated fly net, honeycomb blind, and rain sensor. The  innovative Duette honeycomb blind material with hollow chamber construction offers the greatest possible thermal insulation, and the inner aluminum lining reflects up to 99% of harmful UV rays. If the roof hatch is left open and it starts to rain, the rain sensor will automatically close the hatch.  The blind and fly net are mounted to the inner frame and can be operated together or independently.

Air Conditioner

A 12,000 Btu Energy Star rated air conditioner removes humidity provides cooling to keep occupants comfortable in hot and humid weather.  The air conditioner is mounted above the bank of drawers on the rear wall and features three cooling settings, three fan speeds plus auto-cool and sleep mode. It can be operated from a control panel mounted adjacent to the air conditioner or by a remote control.

The air conditioner is powered by 110 volts AC and cab be run off of battery power through the inverter for a period of about 6–8 hours (12–16 hours with optional  two extra batteries) before recharging is required by either idling the engine or plugging in.