I'm on the same wavelength as you, it seems impractical at best. The
building is fairly new, and well insulated, no windows, with foam filled
aluminum doors. The outdoor temp is 32 degrees.

"Jim Elbrecht" wrote in message
...
"RBM" rbm2(remove wrote:

Don't know if there is a formula for this and I'm not looking for a
typical
heat loss calculation. The scenario is this: Garage is 24' X 24' with 12'
ceiling. There is sheetrock and insulation in the ceiling and three walls.
The garage has two standard overhead doors. Temperature is aprox 32
degrees.
I want to raise the temperature to 60 degrees in about one hour. How many
BTU's do I need?

Anyone who has the numbers is going to need to know how cold it is
outside-- is it likely to get to 20 below or is 32 the coldest it gets
outside?

How much insulation and how many & what type of windows will also be
needed if this is even doable. Hey- while you're at it- are those
doors new, insulated doors, or 50 yr old aluminum shells?

All that said- I think you're going to want something in a kerosene,
gas or oil heater. My WAG would be something in the 50K BTU
range- that would be about 15000 watts- [62 amps of 240 if my memory
and math serve me]

Electricity has its advantages, but IMO, heating a space up in a hurry
isn't one of them. [though I will say I've never seen an electric
furnace in action- if you're in the TN Valley that might be worth
looking into]

Jim