An under-rear-seat, gas-powered (got its fuel from the tank) heaters used to be an option on VW vans. Aftermarket offers Propex, but they ain't cheap. Plan on a

An under-rear-seat, gas-powered (got its fuel from the tank) heaters used to be an option on VW vans. Aftermarket offers Propex, but they ain't cheap. Plan on a couple of thousand if someone else does all the work. $700 for just the heater, IIRC. What we used in our VW camper in winter was an indoor-safe propane heater: http://www.mrheater.com/little-buddy-heater.html http://www.mrheater.com/little-buddy-heater.html