This is the first year I've had 3 TM's - I have room for 2 TM's in my warehouse garage but #3 - the HTM will have to stay out. I've wrapped the equipment with blankets to try and prevent a freeze of the equipment (will get down to about 30 tonight). Has anyone ever plugged in a small forced air heater ? I thought about plugging one in - setting it on low and putting into the E150 to prevent freezing. Anybody try this? Is this a good idea?