We had our first cold weather and it's time to think about shop heat again. I have about decided what I want but trying to decide on the size I need. Anyone remember how to calculate heat loss? I have .. or had the books with all the heat loss and gain figures but no idea where they are. I have a roughly 30 x 40 daylight basement. More than half is below grade. Large garage door is by biggest heat loss item.
I had drops installed when they ran the gas lines in the house. I have one on either side of the shop. I have decided on propane wall mount heaters. I am debating between two 10K BTU heaters. One on each side. Or just a single 28K heater.
I am wonder if the 10K wouldn't be enough heat but I am afraid I might have to leave it on in really cold weather. SO it might be cheaper to just have the one big heater and just heat the shop when I there. I would probably want a small fan to move the air around the shop.
Anyone have heat loss data? Or may know a web site?