How do I determine the size of a ductless minisplit?
How do I determine the size of a ductless mini-split Heating and Cooling for my new to me Cottage type home built in 1925.
It is 36 feet wide by 26 feet deep. It is an open ceiling type to the roof rafters about 12ft high at the center peak with R-19 insulation, the walls are R-13, Two inside rooms/divider walls with no ceilings (open concept).
The two side outside walks and the front wall get no sun there Is total of 9 double pain windows on these walls the back wall 30ft long has 10 single pain wood frame windows that slide open from right to left.
I would need to heat the basement which is the same size but with 7 foot ceiling 3 of the walls are underground Level the back wall is above ground at 30 ft long and all single pain windows
The basement just needs to be kept above freezing 40-50 degrees?
I am in north east Pennsylvania the winters average 20-35 degrees but dip down to 0 sometimes
I was told I need 24,000 btu for the upstairs and 9,000 for the basement dose this sound correct.
The only other heat source is a fireplace.
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