I have an early model Propex heater for sale, the X1 model. It is rated at
1600 watts / 5100 btu on propane or butane. Very similar to the Propex
heater sold more recently, but slightly larger dimensionally, and the intake
air for the burner is located in a different spot on the heater. Works fine.
This model came without a thermostat (an on-off switch instead) but one is
easily added. I need $300 for it. Email me for any further details.

Karl Mullendore
Westy Ventures
Gapland, MD 21779
301.432.4645