Why Does A Ductless Mini Split Need To Be A Minimum Of 5' Off The Floor? - HVAC - DIY Chatroom Home Improvement Forum


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Old 09-13-2011, 08:01 AM   #1
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Why does a ductless mini split need to be a minimum of 5' off the floor?


I have an a-frame attic space and I was looking into installing a Sanyo 12KHS71 ductless mini split but as I was reading through the installation info online it said something about needing to be 5' off the floor for wall installations. I the problem is, there are windows at each end of the a frame room and the other two walls are sloped to a knee wall which is about 4'. I literally don't have any wall that goes up 5'.

I'm just wondering why the necessity for 5' floor clearance? Is there a major reason for this? I'm not an HVAC person.

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Old 09-13-2011, 03:23 PM   #2
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Why does a ductless mini split need to be a minimum of 5' off the floor?


Basicly it needs a certyain amount of return air,,,i.e. warm air to go over the cold coil.
It could get to a point where cold air is the only air that the unit can process and that will either turn the unit off in an uncomfortable room or it will freeze the coil on you and be a big mess.

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Old 09-13-2011, 05:52 PM   #3
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Why does a ductless mini split need to be a minimum of 5' off the floor?


I can see that possibly being an issue. About the best I could do is mount it at about 4 1/2' off the floor. I'm thinking that's a negligible height difference and it might be ok. Otherwise I'm left with space heaters and window units.
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Old 09-13-2011, 06:49 PM   #4
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Why does a ductless mini split need to be a minimum of 5' off the floor?


Quote:
Originally Posted by jayp View Post
I can see that possibly being an issue. About the best I could do is mount it at about 4 1/2' off the floor. I'm thinking that's a negligible height difference and it might be ok. Otherwise I'm left with space heaters and window units.
I agree.4 1/2 feet should work ok.
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Old 09-13-2011, 09:26 PM   #5
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Why does a ductless mini split need to be a minimum of 5' off the floor?


They generally want that 5 foot height because their air discharge is from the bottom. I doubt you'll have any real problem at 4 or 4.5 foot though.
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Old 09-15-2011, 12:12 PM   #6
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Why does a ductless mini split need to be a minimum of 5' off the floor?


They would use it as a reason to refuse warranty though, make sure you cut 2 feet off your measuring tape when detailing in photos.

Now that's funny, I don't care who you are!

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