Thanks for the reply and info. Way I understand it, you have a 5' exhaust hose to vent with. I plan on using it in my hotshot rig. The main unit in the cab, exhaust out the window( AC exhuast) Gen. in back for power. Excess water has a drain, I can deal with thatby drilling a hole in the cab and draining. This is to be used for sleeping comfort and save fuel, vs. idleing for 8 hrs plus. As a side note I want to use this for comfort in our tent, as we camp alot here in south texas. Summer time really limits our camping.