OK, I'm new to RV'ing and picked up a 1999 Keystone Springdale Lite. It needed a little work, some roof repair, replacing some wood, etc. I've checked out just about everything on the RV but I can't find the furnace? I've checked every hatch, hole, etc. and can't find anything that looks like a furnace. The outside access has the fridge, water pump, and hot water heater, but no other access found. Without looking like an idiot, any help is appreciated. Thanks!!