acdoctor
Solar Enthusiast
I have a 12000 Fujitsu 29 SEER and a 1000sf with R-50 attic, R-17 walls minimal number of double pane. On nights with 32 low and approximately 50 for high with unit set to 73 deg and the fan set to med. high. ( fan set med high to push down hall to rest or the house). There is about 2 deg difference in temperature from one end to the other. It uses 8 kw in the 24 hours. On nights in the 20s I use a pellet stove. On nights in the 1s I use both.