Two Zone Mini Split for 750sqft Garage - Head Placements
- Thread starter BigMike62
- Start date
Your plan looks good to cool the area you are working in as well as to add cooling to the larger space if needed.
You ought to check the manufacturer's minimum and maximum lengths of line sets before committing to your design layout.
Too long of a line set and you will need to add refrigerant.
I have installed ceiling cassettes and have found them to have less blower capacity relative to an equivalent BTU-sized wall evaporator.
Also, the ceiling cassette evaporator does have an internal condensate pump\sensor that could go bad relative to the gravity feed condensate drain on a wall unit.
You ought to check the manufacturer's minimum and maximum lengths of line sets before committing to your design layout.
Too long of a line set and you will need to add refrigerant.
I have installed ceiling cassettes and have found them to have less blower capacity relative to an equivalent BTU-sized wall evaporator.
Also, the ceiling cassette evaporator does have an internal condensate pump\sensor that could go bad relative to the gravity feed condensate drain on a wall unit.
ratflinger
Well-known member
Usually 25ft before you have to add charge.
justinjoyal
Well-known member
You say "cassette" but your drawing seems to show regular wall units ?
I would personnally not pay for a dual-zone system for that space.
It is not all that big and one larger head would do the trick IMO, unless you have specific needs. I would mount it on the wall on the right, just about in line with the black SUV's B-pillar with the outdoor unit right behind it (unless the height is not sufficient for the airflow to clear the SUV's roof.)
I would personnally not pay for a dual-zone system for that space.
It is not all that big and one larger head would do the trick IMO, unless you have specific needs. I would mount it on the wall on the right, just about in line with the black SUV's B-pillar with the outdoor unit right behind it (unless the height is not sufficient for the airflow to clear the SUV's roof.)
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I thought the wall units that are mounted up high are called cassettes.
My worry with a single system is keeping the shop area cool. I live in Florida and it will be like Hell's basement in there in the summer. We will have to come up with a plan on keeping the garage doors down and only opening them once in the morning and once at night.
I’d follow Justin’s plan. Simpler, easier and cheaper to do. Your mini will havve an air sweep, likely a four way air sweep. You can set the range of that sweep. Also, these things are variable speed. They want to do two things. One, keep you comfortable and two, do it at the lowest speed that it can continue to operate. As you are looking at cooling the evap will blow the air out across the ceiling so the air can settle to the floor. If you find that the tool box/bench area is not getting the air flow, which I doubt, put a small fan in there, but I’d make the mini prove it cannot do it first
I would not bother with a two head unit in that small space either.
I might drop an 18K in it, which should be too large, but it will cool down faster if you don't run it all the time. The small work area well cool down too. If nothing else a cheap fan blowing out at the ceiling, or in near the floor will move air around. Even a ceiling fan right over the front of the white vehicle would help, and I would recommend a ceiling fan any way.
I might drop an 18K in it, which should be too large, but it will cool down faster if you don't run it all the time. The small work area well cool down too. If nothing else a cheap fan blowing out at the ceiling, or in near the floor will move air around. Even a ceiling fan right over the front of the white vehicle would help, and I would recommend a ceiling fan any way.
Steve W.
Well-known member
This is a cassette unit:
When installed, you only see the grille in the ceiling. You DO need space above it for access to plumbing and mounting hardware.
I did not read your drawing closely enough, first time through. I just installed one in my family room, so I thought you were referring to the two red boxes beside the white vehicle.
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Can you move the minisplit head farther forward, over the front of the vehicle? Either that or it needs to be mounted high enough to blow over the top of the vehicle.
65’Comet5.0
Active member
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- Oct 14, 2023
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My building is 800sq ft and I did a two zone 27k btu system but that’s only cause I got it so cheap I couldn’t pass it up. For brand Fujitsu, Mitsubishi, LG are the main ones I’d look at. That placement should work long as you can get it high enough up to blow over the vehicle you will park there. That said having used my building for a yr now and while not necessary me personally I like the idea of the one above the black vehicle in the second design and doing a smaller second head over the cabinet in the work bench area. Both of mine are over my benches with a 7’ ceiling fan in the center of the building and it’s nice feeling air movement in all the areas I’m working in.