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One of the key design elements of the Propex heater is that combustion is separate from the heated cabin air. This precludes noxious fume infiltration and condensation inside the heated area.Propex designed several safety features into their heater units because vehicle-mounted accessories tend to experience extreme vibration and environmental extremes. One of these safety features is an air flow sensor that measures the velocity of the combust …

If your installation requires a longer length of harness between your heater to your desired thermostat location, we stock harness extensions for plug and play functionality.Propex 15.5ft Thermostat Harness ExtensionPropex 21ft Thermostat Harness ExtensionThe extension harness will work for the most recent iterations of the Hs2000, HS2211 and HS2800. If your thermostat harness has an inline connector at the thermostat end like the photo below, t …

The Propex heater is designed to be a floor mounted unit. We have spoken with several heater owners that wish to mount the heater in a cabinet or closet above the floor. While this might be convenient for the layout of the vehicle, it poses some potential problems with reliable heater operation. Here's why.When the heater is mounted on the floor as designed, the combustion piping almost immediately skews away from a vertical orientation. When …

As with any electrical connection that will be exposed to changing environments, it is important that you use dielectric grease when connecting the thermostat and power harnesses to your Propex circuit board. Dielectric grease is a silicone based product that will seal out moisture and prevent oxidation of the electrical terminals. This is NOT just a matter of smearing a glob of grease onto the connectors and calling it good. Dielectric grease …