BTU calculator

[BroncoJAK]

Keep finding conflicting info on the ole interweb. Seems to be too broad of a search subject here. Hoping I can find a clear answer to this.
What I have: 40x60x14' all steel shop.
Concrete slab.
One 3'0 walk thru door
Two 10x12' insulated overhead doors
One 12x12' insulated overhead door
1/4" doublefaced foil insulation R11? rated I think.
What I'm looking for is: What size heater for the winter months here in central Arkansas.
I have a 250 gallon propane tank I acquired through some trading so that's the way I'm leaning.
I've gotten answers anywhere from a single 145000 BTU forced to a 70000 BTU infared. Worried if its too small it won't heat up or too big it will short cycle.

 

[JakeKohl]

HVAC Calc is your friend. It's about $30 for a 30 day license and you can enter all your parameters, sun direction, climate, etc. It was very accurate for my shop.

 

[Charles (in GA)]

You may find this thread by redsky49 helpful.

Charles

 

[ikucera]

My building almost exact same as yours. What size (BTU) did u go with?

 

[zmaxmotorsports]

Keep finding conflicting info on the ole interweb. Seems to be too broad of a search subject here. Hoping I can find a clear answer to this.
What I have: 40x60x14' all steel shop.
Concrete slab.
One 3'0 walk thru door
Two 10x12' insulated overhead doors
One 12x12' insulated overhead door
1/4" doublefaced foil insulation R11? rated I think.
What I'm looking for is: What size heater for the winter months here in central Arkansas.
I have a 250 gallon propane tank I acquired through some trading so that's the way I'm leaning.
I've gotten answers anywhere from a single 145000 BTU forced to a 70000 BTU infared. Worried if its too small it won't heat up or too big it will short cycle.

from my experience in Arkansas Id say you guys get more ice storms than long drawn out cold weather,Id aim for something in the 120,000 btu range with a 90 plus forced air furnace.
That's just a ball park number,youll have to see how it matches up to the furnace sizes that the brand you prefer sells of course.

 

[Full Throttle]

In a shop that size its best to have 2 smaller 60/70k btu/h units rather than 1 large. It give you better and more efficient operation in milder weather and more even heating.

 

[ikucera]

I know. But then I take up room on the sides of the building, if I could run 1 larger tube down the middle, it would be better for me as far as layout goes. I have a guy saying 1 200,000 tube down the middle will do it.

 

[Full Throttle]

I know. But then I take up room on the sides of the building, if I could run 1 larger tube down the middle, it would be better for me as far as layout goes. I have a guy saying 1 200,000 tube down the middle will do it.

Its going to be so intense in the middle you won't want to be near it.

I have seen it, felt it and had to resolve this same issue over and over.

Its not like a ducked forced air furnaces. Radiant heat in that btu rating with low ceiling is gonna be serious.

I as a hvac industry pro strongly advise against 1 unit