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Old 01-26-2013, 12:54 AM   #1
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2 t-stats


I have a stupid question, can you run two t-stats on one hvac system? I have a two story house and we are having a problem keeping the far upstairs bedroom warm when I start a fire down stairs. I put a little fan on the steps trying to blow some heat upstairs but it is not enough to get to the back bedroom. I was thinking installing a t-stat base upstairs so I could move the t-stat up there when I have a fire down stairs. This should work right? Only one would work a time and the other one would just have open wires.

Thanks for the help.

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Old 01-26-2013, 02:08 AM   #2
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http://www.perfect-home-hvac-design....ac-zoning.html

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Old 01-26-2013, 05:56 AM   #3
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I didn't want to spend the money for zoning. especially wwhen everything is perfect when I don't have a fire downstairs.

the two thermostat scenario would definitely be the cheapest way to go. the only problem I see is if I did have two thermostat at all times and not just two sub base is, if I accidentally had one in heat mode and one in cool mode, the reversing valve would get to signals. and I'm not even sure that's a problem because the reversing valve or (the orange wire) does not go to ground in heat mode I think it just opens, right?
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Old 01-26-2013, 07:15 AM   #4
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Get a wireless t stat so u can put in wherever you want.
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Old 01-28-2013, 02:47 PM   #5
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Get a Honeywell red-link thermostat and a personal comfort control. The PCC can sense remotely.
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Old 01-28-2013, 03:11 PM   #6
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I would think adding a T-stat upstairs would ensure a call for heat when that area gets cooler.

The only downside I see is you are going to be heating the area with the fireplace at the same time. Could get fairly warm down there before you reach the desired temperature upstairs.
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Old 01-28-2013, 03:56 PM   #7
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Have you tried running the fan continuously? It will help circulate the heat, not sure if it will do enough for you.

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