We are total electric, so we tend to watch our utility usage carefully. Yesterday, and the last few days it’s been around the 90 degree mark. We’ve been using the attic fan at night for some really comfy sleeping. Far cheaper than the ac for sure. When we retired last night the temps were still in the mid 80’s so naturally we turned on the attic fan.
About 2 this morning I woke up to a sound I couldn’t quite identify. After a few minutes I realized it wasn’t one sound but two, overlapping each other. The attic fan was the first one, and the second was the furnace. Temps had fell like a rock outside to the freezing mark, an over 50 degree drop. So the furnace that was on automatic, had kicked in when the attic fan drew in that cool air. Needless to say I got up, turned off the attic fan and closed all the windows. Amazingly enough it was nice and comfy in the house—thanks to the furnace, LOL! I’m sure our rural co-operative electric company will enjoy that double usage.