looking to heat and cool my new garage it is 24x30 12 ft ceilings very well insulated plus insulated 16 ft door Will 15000 btu's get it done Thinking of getting this http://ip.smarterwayinc.com:8080/res_systems/PTAC/ge/55h15.asp will it be enough
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how many btu's do i need
- Thread starter sboxs
- Start date
cork
Well-known member
I use a cheap bottle mounted propane heater that is rated at 15,000 BTU to heat my 20x30 garage with 10' ceilings. It knocks the chill off but need to run a long time to raise the temperature above 60 when its real cold ooutside.
NHCharger
Well-known member
You are going to heat 8,640 cubic feet.
My shop is 30x50 with 11' ceilings, one 12' door, shop is well insulated. Total cubic feet is 16,500. I needed a 60k BTU Modine heater for mine. Granted I am in NH where the winters are a bit harsher than yours, but I agree with Cork. Your heater might have to run almost full time to keep up. You might want to step up to a 25 or 30k BTU heater.
My shop is 30x50 with 11' ceilings, one 12' door, shop is well insulated. Total cubic feet is 16,500. I needed a 60k BTU Modine heater for mine. Granted I am in NH where the winters are a bit harsher than yours, but I agree with Cork. Your heater might have to run almost full time to keep up. You might want to step up to a 25 or 30k BTU heater.
I would always oversize any HVAC unit
I have a 30x50 garage with a 12’ ceiling height that is extremely well insulated and one 8’x18’ garage door. The 64,000 BTU combination forced air furnace AC unit that I installed makes it very comfy. When it was in the teens several weeks back it was cycling off more than on and holding a cozy 75 degrees. It also has 29,000 BTU cooling and has no problem cooling the garage on a hot 90 degree day.
To keep things simple I installed the identical unit in my two 26x38 garages. Needless to say they are both cozy also.
I have a 30x50 garage with a 12’ ceiling height that is extremely well insulated and one 8’x18’ garage door. The 64,000 BTU combination forced air furnace AC unit that I installed makes it very comfy. When it was in the teens several weeks back it was cycling off more than on and holding a cozy 75 degrees. It also has 29,000 BTU cooling and has no problem cooling the garage on a hot 90 degree day.
To keep things simple I installed the identical unit in my two 26x38 garages. Needless to say they are both cozy also.
RonBou
Well-known member
You need a minimum of 45,000 BTUs for that square footage for an efficient system.
storts
Member
I came Up with 48.000,,,and factor in if your welding and heating steel,,and a exhaust fan,for the smoke,,,Good Luck,and Have a Happy and Safe one!!!!!!!!!!!!!!!!!!
krooser
Well-known member
You need 60K or so. I COOL 1000 sq. ft. of my shop with an OLD 12K btu window a/c unit.
thanks but if you read this thread i still don't have a answer
i didn't think $1,200 was alot of money
buying a furnace means duct work and fuel lines ( i don't have gas on site) got to be a lot more than $1,200 plus i still need A/C
its only 720 sqft not 30x50
the walls are 19r plus wood plus brick
so i'm going with it plus i have 2 small propane heaters and a portable roll around A/C unit that i will use to move the temp to a comfort range to use my wall unit to maintain
plus the garage door will rarely be open as this is my workshop to restore my Cuda and storage for the Z06 which is only used on sunny sundays
thanks for all the advice
i didn't think $1,200 was alot of money
buying a furnace means duct work and fuel lines ( i don't have gas on site) got to be a lot more than $1,200 plus i still need A/C
its only 720 sqft not 30x50
the walls are 19r plus wood plus brick
so i'm going with it plus i have 2 small propane heaters and a portable roll around A/C unit that i will use to move the temp to a comfort range to use my wall unit to maintain
plus the garage door will rarely be open as this is my workshop to restore my Cuda and storage for the Z06 which is only used on sunny sundays
thanks for all the advice
sboxs said:looking to heat and cool my new garage it is 24x30 12 ft ceilings very well insulated plus insulated 16 ft door Will 15000 btu's get it done Thinking of getting this http://ip.smarterwayinc.com:8080/res_systems/PTAC/ge/55h15.asp will it be enough
My garage/shop is exactly the same size with 12' ceilings and well insulated. I tried a 30,000 BTU propane space heater and it would barely make it tolerable in real cold weather (30 degrees). I just installed a ceiling mount 75.000BTU propane heater (vented to the outside). It heats the garage up VERY quickly and doesn't run very often to keep it warm. Small/undersized heaters have to run constantly to try to keep it warm and if they are non-vented (like a space heater), they have a harder time because you HAVE to keep a window or door open so you don't risk CO poisoning. I researched heater size before I bought mine and everyone I asked said a minimum of 45,000 BTU but 75,000 BTU would be better.
This garage heater calculator is an easy way to size a heater for your garage. It will tell you exactly how many BTUs you need and suggest a heater to satisfy your needs.
Hi all just wondered if theres a calculator for oil heaters as well as factors for garage doors? my shop is 30x80 with scissor trusses that peak at 11 ft but wall height is 9.5 and i have 7 insulated 8ft doors....if i do 30x80x10 times 3 for average insulation which i know i better than average its 72,000 btus, does this sound right? also the heater im looking at is a 140,000 btu waste oil heater, i thought i would need a 175,000 to compansate for the doors any ideas? I know oil heaters are best at ratings btus are higher than most, its a home shop pole style with plenty of insulation and plastic barrier taped seams 5/8 sheetrock finished average door openings in shop not commercial in out. thks.