What is the groups suggestion for heating a 40x50 insulated hanger. It
doesn't have to be hot I just want to raise the temp about 15-20 degrees
when it is 30-40 outside.


How about one of those infra-red heaters. Instead of heating the whole
hangar and losing it in the ceiling, just heat yourself and what you're
working on. Like the ones in Home Depot's entrance.

Kobra