Mike, this may be a tough call. Window units are easy but mini-splits probably
have a much better efficiency. If you have any possibility of adding an
additional conditioned area such as an office, a lot of mini-split compressors
can support multiple inside units.
Peace,
Pat
Pat Horne
We support Habitat for Humanity
On Apr 19, 2021, at 6:50 PM, Mike Rambour <lists@dinospider.com> wrote:
 Ok, I want a cooler garage this year. I have been planning to install a
mini-split for several years now and this is the year. Power will be a
slight problem, shop has plenty but none where I want the compressor to go, so
have to run some power. Shop has 200amp sub-panel 40ft away from where I want
to install compressor. Not a big deal BUT I saw a 18k btu window unit at Home
Depot and was thinking that should work great and be half the price.
My shop is 24ft x 40ft so 960 sq. ft. 9ft tall walls of 2x6 filled with
insulation and I went overboard on ceiling insulation also, stays cool until
mid-afternnon on hot days then becomes a oven for the evening, I live in S.
Calif. I already have a Hot Dawg gas heater so I don't need the heat that a
mini-split would provide, but might be nice to get rid of the Hot Dawg (doubt
that I would) and have one unit do both. In the "shop" area of the garage I
have barn doors that I welded up forever ago, 1x2 steel with a plywood
exterior, i have not used/opened those doors in over a decade, they were
installed when I built the shop just so I could get my lathe and mill in
easily. I have no windows in the shop so I was thinking I could put this
window ac unit in one of those barn doors, the frame will easily handle the
weight and it would be a super easy hole to cut and install the unit into, I
think even the hinges would handle the weight but I can get stronger bigger
hinges if I need them. Then I have dedicated 50amp plug right next to that for
my TIG to plug the unit into, I weld mostly in the front of the shop anyway but
I wired every wall with a 50amp for the TIG and 30amp for the table saw when I
built the shop (I really went overboard on wiring).
So what would you do ? mini-split seems to the answer but half the price for a
easier install window unit and cut a hole in a unused door seems like a good
idea, good ideas are often the worst...
mike
--
A gun is like a parachute, if you need one but don't have it,
you'll probably never need one again.
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