Mini-Split system installed

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Forum topic by Kelby posted 10-16-2012 05:47 AM 909 views 0 times favorited 4 replies Add to Favorites Watch
View Kelby's profile


134 posts in 1831 days

10-16-2012 05:47 AM

Well, my Mitsubishi min-split heat pump has been installed in the garage, so I wanted to give a quick overview for people that might consider such a thing in the future.

My shop is a three-car garage. I live in So Cal, and my garage is as inefficient as it can be. No insulation in the walls, and I have a flat roof over the garage with no insulation either. A large single pane window, and plenty of leaks around the shop. The shop has a south-facing wall that gets sun most of the day, and a west-facing wall with garage doors to make sure the heat keeps hitting it as the sun sets. Beginning mid-day, the shop is usually 7-10 degrees hotter than the temperature outside, and even more after about 6 in the evening.

I got several quotes for a mini-split system, and I’m glad I did. The first two contractors wanted about $6500 to install a lesser-brand 18,000 btu mini-split a/c (no heat pump). The third contractor wanted $5500 for the Mitsubishi 24,000 btu heat pump. He did a very nice job installing it.

I can’t believe how fast this thing cools down the garage. Today was 85 degrees outside, which usually means temps of over 90 degrees in the shop. This evening I turned on the A/C, and the temp in the shop dropped 10 degrees within 15 minutes. It gets as cold as I could want it. I have to turn it off after a while or the shop turns into a fridge.

Obviously, this is October. I suspect it may have to work a little harder in the middle of the summer when temps get up in the 90s and occasionally over 100. But I am a very happy camper. I even find myself wanting to stay in the shop longer because when I work out there, I get hotter than I normally am, and I’m reluctant to come back in the house now that it is warmer in the house than in the shop.

-- Kelby

4 replies so far

View GrandpaLen's profile


1643 posts in 1693 days

#1 posted 10-16-2012 06:44 AM


I’ve seen several publications on these units but have not known anyone who has installed one in their shop.

Please update us on your unit during the winter months, not that I could expect the same results here in Indiana but I would be interested in hearing how you like the heat pump.

Best Regards. – Grandpa Len.

-- Mother Nature should be proud of what you've done with her tree. - Len ...just north of a stone's throw from the oHIo, river that is, in So. Indiana.

View Kelby's profile


134 posts in 1831 days

#2 posted 10-16-2012 03:36 PM

Len, will do.

-- Kelby

View jeff's profile


974 posts in 2885 days

#3 posted 10-17-2012 12:39 AM

we have one in our home in our addition…recommendations were to keep the filter clean on a monthly basis…please update on its performance…Jeff

-- Jeff,Tucson,Az.

View MT_Stringer's profile


2820 posts in 2651 days

#4 posted 10-17-2012 01:44 AM

I have one in my one car garage. Constant 77 deg. Mine is a Fedders, but same design with heat pump. I haven’t had to try the heat pump yet.

And like Kelby said, it is a lot easier to spend more time enjoying the woodworking in a comfortable environment vs the hot temps.

-- Handcrafted by Mike Henderson - Channelview, Texas

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