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Corley · 05-24-2018, 08:14 AM

In case anyone is looking back at this old thread, a mini split heat pump will use only about 1/3 the amount of electricity that one of those hanging electric units uses, are pretty cheap to buy, and not difficult to install. As to size, that depends entirely on your sealing and insulation. If well insulated, a 9k btu unit would have no trouble keeping a 22' X 22' garage warm. Those go or about $600. If no insulation, and outside temps go to around 0 degrees, it could require several times that amount of btus. If interior walls and ceiling are finished with wall board, but very little insulation otherwise,. I'd probably use 12k btu unit. You can calculate you heat losses and find the correct size pretty easily, othwise you just need to oversized and hope for the best. I've installed lots of mini splits and love their efficiency, plus you get a/c for free.

05-24-2018, 08:14 AM	#7
Corley Senior Member Join Date: Aug 2011 Location: Battle Ground WA Posts: 293	Re: Heat for my garage In case anyone is looking back at this old thread, a mini split heat pump will use only about 1/3 the amount of electricity that one of those hanging electric units uses, are pretty cheap to buy, and not difficult to install. As to size, that depends entirely on your sealing and insulation. If well insulated, a 9k btu unit would have no trouble keeping a 22' X 22' garage warm. Those go or about $600. If no insulation, and outside temps go to around 0 degrees, it could require several times that amount of btus. If interior walls and ceiling are finished with wall board, but very little insulation otherwise,. I'd probably use 12k btu unit. You can calculate you heat losses and find the correct size pretty easily, othwise you just need to oversized and hope for the best. I've installed lots of mini splits and love their efficiency, plus you get a/c for free.