Will a 30000 btu heater heat 800 sq ft?

Answer 1

I've been pondering the same question lately. Off the cuff, 30,000 btu would do it IF you're looking to raise the temp about 30 degrees, have 8 ft ceilings and a so-so amount of insulation.

If you Google "how many btus needed to heat garage-shop" there's a couple calculators out there that will help.

Yeh yeh yeh, folks will flex their brain muscles to disagree and good for them, read their responses before you decide what to buy.

I have a 30X30 ft garage, 8ft ceiling here in central Wisconsin, bought me a PRO COM 30,000 btu vent free dual fuel heater at Menards for $200.00 and for me, works just dandy.