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#27133 - 07/02/03 10:06 AM cental a/c
frank Offline
Member

Registered: 05/29/01
Posts: 361
Loc: windsor ontario canada
The typical central A/C will cycle every 30-40 minutes Do you think it's more economical to leave the Fan run constanty in manual or in auto so it cycles with the compressor?What do you do?

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#27134 - 07/02/03 12:43 PM Re: cental a/c
classicsat Offline
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Registered: 11/23/02
Posts: 449
Leave it running, or at least in low, and jump to high when the A-coils are cold.

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#27135 - 07/02/03 02:16 PM Re: cental a/c
maintenanceguy Offline
Member

Registered: 12/02/01
Posts: 303
Loc: Southern NJ, USA
If you're talking about pure efficiency as energy (in BTU's) removed from the conditioned space vs. energy spent on running the ac, then having the fan off is slightly more efficient.

But if you're comparing dollars spent on electricity for the same comfort, leave the fan running.

With the fan off, air tends to stratify, with the cold air down by your feet and the air up at your torso and head being warmer.

But if the fan runs and the air keeps circulating, this doesn't happen. So you can be comfortable at 76┬║ instead of 72┬║ and that saves energy.

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