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replacing a 30 yr old carrier gas hot air furnace, 75K, output is 60K. 12- 5" ducts, supply is 13x19 and return is 8 x 24, interior 3 level townhouse 900 sq ft total. My heat-loss is approx 50K, i picked a comfort-maker, 66K, output is 53K- i can't figure on CFM? 720 or 1195? for heat only- later i may- though slim possibility, will connect an a/c- 2 years.
thanks, Jack, newbie.
thanks, Jack, newbie.