I have a 1954 Delco oil furnace..... It was a freebie. Not the most effiecent furnace, but heavy duty built. I added a heat exchanger in the exhaust piping to help catch some of the lost heat going out the chimney. I keep the thermostat set at around 50 degrees, warm enough for working (not painting)on stuff and keeps things dry from any condensation. Rated for 86,000 btu.
John
