Thread Tools
Old 09-14-2013, 10:42 PM
Member
Join Date: May 2010
Location: Neither here nor there
Posts: 11,810
"Circ" v. "auto" setting on programmable thermostat

What is the difference between circ and auto settings for the fan on my HVAC thermostat when the heat is on, when the a/c is on, and when both of those are off?

I know that "on" turns the fan on so that it runs continuously whether the heat is on, the a/c, or nothing is on.

My older thermostat only had on and auto, and I can't figure out what circ is for. Clearly, it means "circulate" or "circulation," but what does that mean?
Old 09-14-2013, 10:46 PM
Charter Member
Join Date: Jun 1999
Location: Milwaukee, WI
Posts: 26,635
On makes the fan run 100% of the time regardless of what is going on with the furnace or compressor. Circulate makes it turn on and off randomly throughout the day. On mine, it aims for being on something like 30% of the time.
I'll sometimes use it in summer to help move the air around or in fall when I have the windows open (again, to help move the air around) but when I don't want to listen to the vents all day and night.
Circulate the air for 5 minutes and then it shuts off for 20, then it kicks back on for a little while, then it shuts off.

Depending on the physical layout of your house and HVAC setup, it might make a world of difference and lower your electric bill...or it might do nothing at all if it's not that good at moving the air where it needs to be to make you feel cooler (and that's what it's all about, feeling cooler/warmer since the air won't be actually heated or cooled).

Try it once, won't hurt anything.

Last edited by Joey P; 09-14-2013 at 10:48 PM.
Old 09-14-2013, 10:50 PM
Guest
Join Date: Dec 2011
Posts: 1,422
Yep, on runs the fan all the time, auto runs the fan when the unit is heating or cooling, and circulate runs the fan at least 30% (or some other predetermined amount) of the time.
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 12:16 PM.

Copyright © 2017
Best Topics: backward k amway recruiting tactics split tens porn hub incest petting kittens cbs font buy nitros oxide 8.5x11 pixels general tso pronunciation trigun ending shortest phone number longest note held purpose of underwear taquilla worm dog pancreatitis shaking martin simpsons kujira meaning quinceanera etiquette pubesant girls dry ramen noodles growth after 18 silly emotion selective breeding human ancient javelins senator owen brewster 7mm allen wrench replacement shelf pegs personal couriers small stripped screw playboy jokes 2015 generator enclosure diy pet sounds overrated duffy strode preacher elven riddles taste buds coming out gfci outlet without ground wire what country has the longest name mens facial hair removal cream carrie-anne moss lesbian bird flies into window what does milkshake mean in slang working in a factory what aisle is molasses in can a cat live in one room how to congratulate someone on sobriety how much seminal fluid is needed to get pregnant newegg verified by visa fin stabilized shotgun slug how much does it cost to get a car out of repo eyeglass repair kits cvs how to straighten a cable wire not responsible for broken windshields sticker what does xlr stand for is it illegal to mail cash water temperature to kill germs basement floor wet under carpet does the heart have nerves cd won't eject from car stereo subaru forester airbag light stays on suck the chrome off a trailer hitch how long does it take for a squirrel to decompose i can feel my food going down and it hurts signs of water in gas electrical tape home depot music to keep me awake