[Lew Ledyard]

I have converted the bottom of my barn into a garage. The size is approximately 35'X70'. Ceiling height is 10'. It has a cement floor. Three of the four walls are 18" thick stone walls, but the interior walls and ceiling have been framed, insulated and pannelled. Because of the layout, I can't really run a vent or chimney. I live in the mid/northern atlantic. Temps can get down to 0, but the coldest days rarely go below 20 degrees.

What would you guys recommend for heat?