Opinions on this Minisplit Layout
Should I go with two or three mini-splits in total for a 2-story, Climate Zone 5A house with a heat load of 37,917 btuh?
Downstairs heat load: 24,077 btuh
Upstairs heat load: 13,840 btuh
My hope is that I can heat the entire downstairs with one 18K btuh Mitsubishi hyper-heat unit, and heat the entire upstairs with one 12K btuh Mitsubishi hyper-heat unit. Or would it be a safer bet to have two units downstairs, say two 9K units, or one 15K and one 6K? By “safer” I’m thinking both of air flow, but also of whether I should oversize the actual heat load by say 1.2 or 1.4 to be more in line with the ASHRAE recommendations. The downstairs is sort of U-shaped where the left side of the U is the living room, the right side is the kitchen and dining room, the bottom is an open-air passageway between the two spaces, and the two points at the top of the U are two entrances to the staircase which face each other (one in the living room, one in the kitchen). Total conditioned downstairs space is ~1,000 sq ft, total conditioned upstairs space is ~ 500 sq ft.
Any help would be appreciated.
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