I’m in the process of building a home and trying to decide if this worth the extra $1100 to upgrade to a 92% furnace. It could take 10 years for the ROI. Example, if I spend $1000 in gas to heat my house, $200 is wasted with the 80% system. Now with the 92% system I would only be wasting $80 which would give me a saving of 120 per year. Over nine years it would only save $1080.
Would I be better off with a two-stage system that uses an 80% furnace? I live in South-central Kansas and can get to below freezing for a month or two.
Would I be better off with a two-stage system that uses an 80% furnace? I live in South-central Kansas and can get to below freezing for a month or two.