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[49445CVO]

I am looking to buy a natural gas heater for my extra garage and am trying to figure out the BTU size I need.  I have been all over the internet and done several calculations and they are all different. I'm hoping someone here will have some HVAC background and help me out.

Garage size is:
32D X 24W X 12H

The average low temp for our winter months is 25 degrees and I am looking to keep it about 50 degrees.

Any help on this would be great.

Thank you in advance,

Rick

[jamnflhxse2]

How's the insulation? Walls, ceiling and are the garage doors insulated? My garage is 30' wide 22' deep and 9' celing. I insulated the walls, doors are insulated and celing is drywall and decked above. I installed one 75,000 BTU low profile Sterling gas fired unit heater and it will heat the garage to 70+ when it's 20 outside. Best garage investment I've made with Chicago winters. Hope this helps.

[49445CVO]

Sorry,

   Walls (rolled) insulated and ceiling (blown) is too. No drywall but there is pressed board for the walls and ceiling.
The garage door (16 X 12) is not insulated. I have a service door with window and a regular window as well as a ceiling fan.

[jamnflhxse2]

I'd say between 105,000-120,000. Try this calculator and let me know what it comes up with.
http://www.heater-store.com/heater_calculator_info.htm

[jamnflhxse2]

If you don't have a connection on a good heater $ let me know I deal with a bunch of great supply houses and get great prices. How far north in MI are you? PM me if you want.
John.

[CVOStreetglide]

I am looking to buy a natural gas heater for my extra garage and am trying to figure out the BTU size I need.  I have been all over the internet and done several calculations and they are all different. I'm hoping someone here will have some HVAC background and help me out.

Garage size is:
32D X 24W X 12H

The average low temp for our winter months is 25 degrees and I am looking to keep it about 50 degrees.

Any help on this would be great.

Thank you in advance,

Rick

I know you said gas BUT FWIW I have had terrific success in Baltimore and now in Jax, FL with the Fijitsu, Carrier, Mitsubitshi (same manufacturer) unit in my garages. It mounts on the wall, heats 75-80 degrees, cools to 62 degrees perfectly and runs on 115.

Also, I would recommend a trip to Home Depot or Lowes to buy their garage door insulation kit. WOW what a difference that makes!! It's more than double insulating windows.

Good luck!!

Jerry

[j f go]

I'm heating a 30x40 with 12 ft ceiling have a 24x11 insulated overhead door and a 2nd floor 12x40 6 ft ceiling.Have 6 2x2 low e windows and 2 uninsulated pass doors. Heating with a Reznor 60K btu natural gas heater,ceiling mount. Very cheap to heat. Get a quote from a couple of companys that do these type of installs and you will at least know what size unit you need. The weather here in Maine gets a little cold so its nice to have a warm place to play when the wife has had enough of me on a long stormy weekend

[49445CVO]

I'd say between 105,000-120,000. Try this calculator and let me know what it comes up with.
http://www.heater-store.com/heater_calculator_info.htm

Looks like 52,800.

This is crazy, I was on another site and they had me do a similar calculation with a couple extra things in the equation but then add 10% of the total and that came out to 158,400 BTU's