Correctly calculating an A-frame mini split load so I can weed out bad HVAC guys?
I have an a-frame, almost perfect 32x32x32 triangle. Using online calculator I got about 22,400 cubic feet (this does not include the 3′ conditioned crawl space). I have 2 bedrooms upstairs w/ bath and 2 downstairs with a primary bath and an open plan with a great room that goes all the way up 27 feet that is roughly 384 square feet at 1st floor. I’ve spoken on the phone to the hvac people and gotten one wildly high estimate from one. These guys can’t seem to wrap their head around the triangle shape I guess. I also have to mention I am required by code to do the ample roof / walls as roof insulation at what is that r38?
So the estimate I’ve gotten so far is a 6 ton mini split system for $29000. Doesn’t that seem a bit high for a 1600sf house? He wants to put a unit in every bedroom when the bedrooms are only 150sf or so each? I have ample crawl space room, but from what I’ve seen mini splits are only ducted from the ceiling correct? I only have 8′ ceilings.
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