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Old 03-16-16, 09:18 AM   #15
gtojohn
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Its not one 100k furnace its 2x 50k units, the match up for their 2 ton a/c counterparts. I get about 15 seer out of the a/c units and don't plan on replacing them too soon. 600 sqft per ton is about the max I care to go, we still have 100F weeks. I prefer to have the hvac off when the house is unoccupied and require more btu to catch up when we get home. Additionally my wife is requiring the house cooler as we age. We used to get by with 78f indoor, last year that went down to 76f, this year shes complaining about 74f. The good news is with my improvements our power usage still went down, thanks micro solar. I know this won't effect my gas bill by much, its more of a curiosity. Preheating the air makes sense, mixing burning 100f air vs 60f air should yield a more heat.
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1.47 kw solar, R-40+ attic insulation, 4 layers radiant barrier, solar attic fan, solar mini pool pump
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