The Question and Answer Board

[Bob Zumbrunnen]

Cubic Feet To Be Heated x .133 x Desired Temp. Rise = BTUs/Hour

120,000 x .133 x 50= 798,000 BTU/Hr.

If I'll settle for a 30 degree rise (was this Celsius or Fahrenheit?), which should keep the building very comfortable on most winter days (about 20-30 degrees typically) but keep things thawed in 0-degree weather (we usually get a few days of sub-zero each winter), then it'd be a little less than 500k BTU.

The insulation in this building must be *really* good. The whole thing is insulated except the 24x14 garage door (it'll be insulated later).

I don't know the temperature inside that building right now, but it's comfortable enough that I've been taking off my coat. Probably upper 50's anyway. It's 29 degrees outside right now. And I'm just using the 150k BTU space heater. I think I've got a big thermometer in my old garage. If I do, I'll take it down there and see what it says.