So while I was lying awake in the middle of the night last night I started thinking about our central air fan. We leave our fan running all of the time whether the furnace/air is on or not. My thought was there was value in keeping the air circulating.
I still think there is but I was wondering how much, if anything, this costs me? So that got me wondering what other people do and what the pros/cons of constant fan vs. auto-off might be?
I've read that it takes more energy to start and stop the motor than it takes to keep it running constantly, so you're proably better off doing it that way. I've tried it, but don't like the constant noise of the fan running.
It is true that the start up burns much more energy than leaving a circulating fan going. One of the major problems with AC units is it's inability to judge actual temperature in a house as a whole. 90% of these new hi efficiancy AC units get their energy savings by staying on continuosly and cooling the air gradually, instead of a dropkick explosion of cold air when it goes above your desired setting. So to finalize, don't worry about the fan running beacause it is moving cold air around the house and keeping the motor from running more. Hope this helps
We're putting in a new furnace/AC later this summer/fall. Considering both a very high efficiency furnace and a heat pump (not ground heat pump). The savings for both sound great, and the local company says half of everything they're installing in the area is heat pump. Anyone have experience with one?
BTW, that sales guy also says running the fan only on a regular central air is fine.
Had a neighbor Friday night start talking about this and then the booze hit, so I missed part of the conversation...anyway here is my dumb question and haven't looked into it on geothermal heating/cooling; can you switch over from traditional high eff unit to a geo?
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