I had brian install a 44d in our raider and the thing is absolutely amazing. went out duck hunting this past weekend in rainy weather and with in minutes you felt warm and dry inside the cabin (also used the heat box to warm up the pizza we had). One question i had is the difference between thermostat mode and ventilation mode. I assume thermostat mode will heat the cabin up to the temp you set and then it will shut off until it drops below tha temperature. I kept it in ventilation mode for the entire trip and i assume that gets the cabin up to temp and then ramps down and continues to run to keep air circulating in the cabin. is that correct? Looks like we went through just under half a gallon of fuel for 12 hours of ventilation mode.