Mini split advice

Pmbreno

Active Member
I’m thinking about placing the condenser for my mini split in the basement for the winter and was wondering if anyone on here does the same in colder climate areas
It’s a mr cool 18k diy model, the room it will be in is 16 x 24 and also has the furnace and hot water heater in it. wondering about temps to keep the room at as well as cfm needed for venting.
 

firsttimeARE

Well-Known Member
Did you check the operating efficiency at x degrees? They should publish this information. Some condensers can cool in low temperatures, but probably not found in an economy line such as Mr Cool
 

Pmbreno

Active Member
I’ll definitely look for that thanks. It says it will cool down to 5 degrees but we get much colder than that come January
 

firsttimeARE

Well-Known Member
I’ll definitely look for that thanks. It says it will cool down to 5 degrees but we get much colder than that come January
They make some down to -15F or so. I don't recommend putting it indoors. But it may work if you have enough space and a high cfm fan capable of 5 air changes per minute with a speed controller

So if a 10x10 room with 8ft. ceilings is 800Cu. ft. Fans are measured in CFM so 4,000 CFM would make 5 air changes a minute in an 800 cubic foot room.
 

Pmbreno

Active Member
They make some down to -15F or so. I don't recommend putting it indoors. But it may work if you have enough space and a high cfm fan capable of 5 air changes per minute with a speed controller

So if a 10x10 room with 8ft. ceilings is 800Cu. ft. Fans are measured in CFM so 4,000 CFM would make 5 air changes a minute in an 800 cubic foot room.
So it seems I would need to
 

Pmbreno

Active Member
So it seems I would need 13k cfm for my room. Might be a bit much to deal with that much noise. I saw a video on a system that puts the condenser in a propagation tent and blows cool outside air into it with the front open for air movement. Would I need to remove 5x air if I was bringing air in also?
 

firsttimeARE

Well-Known Member
So it seems I would need 13k cfm for my room. Might be a bit much to deal with that much noise. I saw a video on a system that puts the condenser in a propagation tent and blows cool outside air into it with the front open for air movement. Would I need to remove 5x air if I was bringing air in also?
See if you can make a smaller room that the unit goes in and bring in outdoor air by exhausting the room with a passive duct with a damper. This duct will bring in air from outside as you exhaust it.

I'd give that a try. This way you don't need as big of a fan.
 
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