Garage Heaters

I use a Mini Split in the Garage. Works great in the summer time to keep cool and has worked great for heat. We however live in So UT so we may have a few days in the 30's. Summer is around 105-120, the Mini Split keeps the garage cool.
 
Here is the King heater I installed in my two car garage that has a taller than normal ceiling. It plugs into a 240 volt outlet and will make the garage into t-shirt weather in under an hour even when it's 10 degrees out. I only use it on days when I am working on cars or other projects because it definitely has a high draw of electricity. I bought mine used but here is a link for a new one if you are interested.


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X2 on this. I wired an inline thermostat to mine. Been great here in iowa for 8 years. Obviously good insulation plays a part. Don't skimp on that
 
Wondering about a heater for our 2 car deep garage. Strongly considering a 240v electric ceiling mounted unit, but wanted to see if anyone else has it figured out on here.
What are you starting with? How will you use the space? What are the goals? What energy sources are available?

Adding a couple South facing windows might be enough to keep it above freezing. My garage has a hydronic radiant slab over a conditioned basement. The thermostat is set at 50° and it rarely kicks on due to the two large windows collecting solar heat.

You could also look at thermosyphons as cost effective passive solution.

Something like this.


Isolating the slab from frozen ground will also help. XPS around the foundation and out horizontally below grade as needed.

 
I’ve got a Modine Hot Dawg 45,000 in my 2 car. A 30,000 would probably be plenty really. They’re reliable and effective. I know several people with them and they work great.
 
Comfort Zone CZ260ER 10,000 watt heater in one corner of the ceiling in a decent sized 2 car garage, decently insulated. little fan in another corner blowing air down to help circulate. easily keeps the garage at 45F when not occupied, and warms it up nicely when wife is in there as it's her ceramics studio. not as loud as a gas reznor, which is nice.

western montana. currently about 15F outside, better than the 2F yesterday morning.... not sure how much $$ that's blowing out, wife wants to stay warm and run electric kilns, gas and elec bill is her expense...
 
A big consideration is how insulated the area is. Right now my garage isn't but by next year the walls and ceiling will have plenty. Just that will make a big difference. From that I'll decide how much I'll need and will probably go propane of some sort.

My pole barn has a woodstove but, again, isn't insulated. Another project for this year.
 
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