02 Aug '13, 7pm

Does new Mitsubishi ductless mini split really work efficiently/reliably for region 5A (Boston) #green

Hi 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.

Full article: http://www.greenbuildingadvisor.com/community/forum/energ...

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