I have a LB White LP furnace and two electric baseboard heaters. Problem with using a furnace is that it heats the air. The air leaves the garage when you open the door. Nice thing about radiant heat is that it heats objects and not air (like the sun). Opening the door doesn't remove the heat. I'm lucky to be on a peak program so I get my electricity at 3.2 cents per KWH. Sweeeet. By, the way, DO NOT use a wood stove. If you keep a car, lawnmower etc... the gas vapors can ignite and kill you and burn your house down.