I run a 60K BTU house furnace in my shop. As short as my time has been lately, I don't want to wait for the shop and it's contents to warm up and I don't want to tend to keeping a fire stoked. I insulated and sealed my shop up tight and the sealed furnace drips it's condensation into a bucket, not the air. I also put a loft over half of it to lower the area needed to heat.
Scott

Scott Ward

2 1948 1.5-ton Loadmasters
The red one and The snow pusher
1 1950 3100
1 1955.1 Chevy 6500
1 1954 Chevy 6500 2-Ton
1 1955 1st Series COE 5700
1 1963 K20 (454)
1 1964 C10 (350)
1 1951 1.5-ton Dump Truck
1953 and a 1956 Ford F800

Raising a teenager is like trying to nail Jello to a tree!