Mr. Heater Garage Heater

[program4444]

Hey all - I know, I know, I hate to rehash a topic that's been discussed in the past, but just want confirmation of what I am seeing here and online before I make a purchase.

I am starting a new build soon, which will include a 36x30 attached garage (roughly 1,100 sq ft.). Walls and doors will be insulted and the garage has three west facing windows. 2 doors (16' and 8') are on the North side. Ceilings are 10'. I am on the edge of Zones 5 and 6.

With all this taken into consideration, online calculators are telling me I need roughly 60,000 - 63,000 BTUs -- assuming they are correct. My current house has a 45,000 BTU Big Maxx in a 2 car garage and I love it. I keep the garage 50 - 55 unless I am working in there.

With these heaters being roughly 80% efficient, I am thinking I should get the 80K BTU unit. Does that seem right to everyone? Just want to make sure -- I'm planning to pick this up now while on sale and toss it in storage.

Thanks in advance.

 

[gmcgeo]

I think 80k is over kill, I would not go over 60k

after doing a quick math i show 57,500btus

 

[program4444]

Appreciate the response. What I'm wrestling with are the tiers --- there is a 50K and an 80K. If you figure 80% efficiency, that equates to 40K and 64K.

Kind of under and oversized either way you go.

 

[toyotadriver]

Given your description and location, I’d go with the 80k. Don’t think you’ll be happy with the 50k. I have an 80k Mr Heater in a slightly larger garage. A 60k would have worked too but Mr Heater doesn’t make a 60k. I live in southern zone 4

 

[toyotadriver]

Double tap

 

[Showkey]

Don’t over think this it’s far from exact.
Even the wall chart at the home center works and gets you in the ball park.
I use 45k in 1000 sqft stand alone shop on the edge of 6/7 zones. It has 75k heater prior, that rusted out And had a board failure after years of unknown ( to me) use.




.

 

[PoorUB]

50K BTU will be plenty assuming reasonable construction considering your location.

My neighbor has a 30K in his 900* sqft shop in North Dakota. No way I would put in an 80K!

I heat 900+ sqft with 50K and not enough insulation in the ceiling.

Here in ND I would put 50K in a garage that large and not even think twice about it. Plus we get -30F or worse here and your area might see -10F.

 

[gmcgeo]

Appreciate the response. What I'm wrestling with are the tiers --- there is a 50K and an 80K. If you figure 80% efficiency, that equates to 40K and 64K.

Kind of under and oversized either way you go.

you are correct, i thought mr heater had on in between... that being said 80k would work then

 

[Showkey]

There are many other choices:
And yes, 30-90k will work

 

[gmcgeo]

There are many other choices:
And yes, 30-90k will work

Trying to squint to see this,..... i cant zoom in for some reason