Minisplit indoor wall locations – 1.5 story Cape
I’m ready to select my mini splits to heat/cool our typical 1600 sq ft 1.5 story cape in Connecticut. The CoolCalc.com Manual J heat loads are about 12k BTU/h upstairs and 26k downstairs with the 8°F design temperature. We have a 2500 W electric baseboard in the kitchen if it gets below the balance point (and a space heater for the upstairs bedroom).
With our layout, I’m thinking 4 indoor heads make the most sense.
I wish I could do a multi-zone, but they don’t modulate very well for the small bedrooms (we sleep with closed doors), so I’m leaning towards Mitsubishi MUZ-FH06NAH’s upstairs and FH12’s downstairs.
Downstairs would be a 12k head in the kitchen (cathedral ceiling w/ fan) and another 12k head on the fireplace wall in the living room.
Dining room, bathroom, and office would not be heated… Is there a way to estimate how much cooler they would be, based on circulation through open doorways?
Upstairs would have a 6k or 9k head in each bedroom. My upstairs concern is our bedroom has a kneewall and sloped ceiling, so no space above the window on the outside wall for the head. Next logical place is in the middle of the master closed (aka toddler’s room!) wall, aimed at the bed. I’d need a condensate pump too…
Can the vents be adjusted so we don’t have a constant blast of air at our heads? Or should I be looking at a floor mount or a ceiling cassette (that doesn’t modulate below 3kBTU).
The outdoor units would be wall mounted to stay out of the snow – two on the north side of the house, and two on the south side.
I need to upgrade my electrical panel now too (man, this is getting pricey!)… Wife will be thrilled to get “central” air for this summer, and I’m jazzed about ditching oil heat in the winter.
Anything else to be concerned about?
Thanks for the help!