Plan for a single minisplit head
We are in zone 6a.
Slab on grade, R20 under the slab, R23+R17 walls, R60 attic. 1400 square foot, our heat load is in the range of 17k BTU +/- a couple thousand at 0F. House is a rectangular footprint, downstairs is completely open with a central wide open U shaped stair, upstairs is 3 bedroom and a full bath.
I am picking the unit up in early Nov. Looking at the air flow diagrams in the engineering manual, it looks like I can blow warm air to the downstairs in the winter, and cool air upstairs in the summer. Or something like that.
Just wondering if anyone has tried this or has any thoughts on how effective it will be. I know that one head is not as good as two, but that’s not happening. It really needs to keep the house above freezing while no one is home in the winter, but most of the service will actually be shoulder season heat, heating on sunny winter days, dehumidification and some cooling in the summer.
I am thinking the worst case is I would need to install a separate thermostat further away from the unit if short cycles. I know for a fact if I install it downstairs I will not be able to get cool air up stairs in the summer. My fear would be that I can’t properly shoot the warm air downstairs in winter.
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