How Many BTUs?

[Greatwhitewing]

Have one of those tent 2 car garages with framed ends and sliding doors that open wide enough to get a car in. The is half in and half out. I would be working of course on the inside. The walls block wind but but a very LOW R value..

How many BTU;s of forced air propane heating do I need to raise the working temperature about 10-20 degrees over ambient?

I had selected (wish listed) a 60,000 Mr Heater. Did I select the right size? Bigger? Hopefully smaller...??

Thanks

 

[vartz04]

As big as you can afford torpedo heater style. Buy a used one.