It's a Mr. Heater, here is the model number:
Model No: MHVFB10LPI
I got this blue flame ventless heater for my trailer. It has an O2 sensor and I want to disable/bypass it. Does anyone know how to do this? The only reason I ask is that elevations at higher altitudes (I park at 9000') have less oxygen and I want to leave the heater on to keep the trailer warm. I certainly won't be camping or sleeping in it.