Replies to post #10780 on I-Home improvement (IHIP)

[BullNBear52]

Auto. Otherwise your fan is running constantly and you're just paying the electric company when it's hot out. ie. Fan's running but it's not calling for AC.

You can switch it to fan on cooler days, turn off the AC and open the windows when the outside temps are cooler than inside.

Once the outside temp gets higher then the AC temp switch it to auto.

[Quasi]

Susie, it all depends on what you are trying to do.

As BullNBear stated it will use more electricity if left in the on position.

However in my case I do leave it on for both the heating and cooling seasons. I have a multi-speed fan so its set to be on low speed all the time and switches to a higher speed if heat or cooling comes on. I do this for a couple of reasons.

1- Noise, It is quite noticeable when the fan comes at high speed, especially when sleeping and the house is very quite. By leaving the fan running there is always a slight background white noise so you don't notice the system starting and stopping.

2- Stratification, I live in a 3 story house so hot or cold air will rise of fall, thus by leaving the fan running on low it keeps the whole house mixed up and at a more even temperature. I also have 9 foot ceilings so you can also get stratification within just one room.

I my case the extra cost of running the fan continuously is just part the comfort solution.

Quasi