Does the new Mitsubishi ductless minisplit really work efficiently/reliably for zone 5A (Boston)?
I have a 270 degree glass sun room that I am joining to the adjacent kitchen.
The main house is 1968.
I am beefing up wall insulation to R19
Ceiling & floor to r38
Can this really work efficiently sub 25 degrees F? Is it reliable?
My alternative is to extend the existing gas hot water system to this new 300 sf room via radiant floor
6000BTU and remainder forced hot water baseboard heat. Nice & reliable, benefits from low us gas prices.
I still need an additional AC solution if I don’t do the heat pump. Just hate the idea of using electricity for heat.
Contractor suggests radiant floor main with ductless for “backup” heat.
Thanks for your help!
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