I just had my 24x30x12 metal building insulated with 3-4" of open cell on the walls and 5-6" of open cell on the roof. This building is going to be a woodshop. I live in deep south texas, basically at the border. There's also a 10x10 roll up door which is not insulated but I will put refeictive lining to help keep heat out even though its in the shade 90% of the day and faces north. I need help figuring out what size minisplit to buy. The peak of the roof is about 15ft. Also where should I position the head of the unit? I'll include some pics. Thanks!
Mini split sizing
- Thread starter JoshM1112
- Start date
my shop is 24x36 with 14ft peak. Insulation is whole building wrapped in double bubble radiant barrier, I put up 4" Vinyl on the roof and framed out the walls with 2x4 and r13 craft faced insulation and 1/2' sheet rock. I have 24k BTU Mini Split. Cools the shop down fine on Hot days. I dont keep it running all the time, only when I am working on things. The heat pump portion is ok during the winter but I run a propane bullet heater for 20 minutes to get it comfortable out here and maintain with the Mini SPlit.
Hub
Hub
What region are you located?
theoldwizard1
Well-known member
IMHO, you will need 2 air handlers. If you want to stay cool and dry on those hot, humid days, buy two complete systems.
My Old Tools
Well-known member
You don't need two systems. One MrCool 18-24000 will cool you just tine. Mine is 30x40x12 with 6/12 pitch, 22 feet tall, with 7 3x5 windows and 12x12 door. Roll insulation with double on the roof. A 36k MrCool has turned out to be a bit of overkill.
vrinner
Well-known member
So you have a 36K MrCool...is it a single unit or do you have multiple zones or just one? Pictures?
My Old Tools
Well-known member
single head unit, mounted at the midpoint of the 40 foot wall in a 30x40. It's mounted 9 feet off the floor. I allow the air above the unit to stratify, leaving the heat up in my loft. It keeps the building very comfortable. The first 2 days after install it ran pretty hard (July) cooling down all the cast iron machines and slab, and sucked a ton of water out of the building. After that it just idles along even on 100 degree days. In the winter I will run a simple box fan upstairs to push the heat down when I'm in there. My walls are 12' but with my roof pitch its 22 feet to the peak.
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Oh my God that Jointer is awesome. Love the I beam winch too. Appreciate the feedback!
My Old Tools
Well-known member
That hoist on a trolley is the single best thing I did when I had the shop built. One ton lift capacity engineered into the building and travels from the main door all the way to the back of the loft. Jointer is a 16" Northfield patternmaker build in 1942.