Question on heating a 40 x 52 pole barn ?

[55Sprad]

My pole barn is 40 x 52 with a 10 ft. sidewall. Insulation R-19 sidewalls, R-30
ceiling. Completely drywalled.
What size BTU heater would it take to adequately heat this space 2080 sq.ft.
Natural gas. Thanks in advance for all your help.

Bob

 

[Deltarat]

I have a Mr Heater 75k hanging heater for my 30x50 with the foil bubble insulation- no where close to what you have- and it heats if well.

 

[metalTobman]

Perfect application for a radiant tube heater.
80 mbtuh and 40' of tube, is what I would use in our climate.
Center the unit on the 52' length, hang it as high as you can.
If venting horizontally through the end wall, make sure to slope the entire heater and venting slightly to encourage condensation to run out.
If venting through the roof use a base tee on your B-vent, so that condensation can't run back into the heater tube.
If you are using a forced air furnace or hanging unit heater you will probably need about 125 mbtuh.

 

[4advtr]

I'm in a similar situation, 32' x 53' with 14' walls and 20' center height. I'm framing it in right now for insulation, however it'll only be about R25 in the ceilings and R21 in the walls as I have to fit the insulation into 2x6 walls and ceiling girders. I'm planning on having a 100 Gal propane tank dropped specifically for heating the shop. Thinking either 75K or 90K forced air heater for my needs. I like the idea of radiant tube heaters but suspect I'd be put off by the costs of the materials and installation. Like many others I'll probably spend about 8-10 hours a week in my shop on average.

 

[nehog]

I keep my 1800 ft shop at 40 when I'm not working in there. Kick it up to 50 when I work, and it takes about 10 minutes to get to temp. I could easily go warmer, but 50 is comfortable for me to work. That's using a 150K btu heater. I could easily gone with less (say 75K) and probably would be happy however. You may be better insulated better than I am, too.