two stage thermostat

Old 11-14-03, 07:41 AM
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two stage thermostat

I currently have a two stage furnace with variable speed fan. I was told that I dont need a two stage thermostat. It seems to take a long time to bring it up to temperature and it cycles between high and low frequently during the warming process. I was wondering the benefits of a two stage thermostat. Any advise is appreciated.
Old 11-14-03, 04:04 PM
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Join Date: Sep 2001
Location: Rochester, Minnesota
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I would suggest the 2-stage. Yes, some dealer would say it's not needed. But I would still use them.

You want your new furance run as long as it can.. LIke turning on the curse control on your car, vs stop and go on the highway..

Some brand will run low fire for about 15 min, if temp isn't met, then it will go into high fire after 15 min with a regular stat.

2-stage will run low fire longer and if the temp drops where the low fire can't keep up, the it will fire into high stage.

When a furnace runs longer, you will get it's full effecney out of it.

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