2 wire thermostat ---upgrade to wireless possible?

Old 07-13-17, 02:33 PM
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2 wire thermostat ---upgrade to wireless possible?

I do have a 2 circuit heating system. Each has a seperate thermostat with only 2 wires. I'd like to update to a wireless system. I understand that a wireless thermostat need +, -, and signal. I could run 3 wires to one of the two. The other one is to far away (no basement, no attic).
I heard there is a way to replace one thermostat with only a sensor and install the corresponding thermostat someplace else.
Anybody with ideas ? Greatly appreciated!
Old 07-13-17, 03:01 PM
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You have two zones of heating. You need two thermostats.

Do you mean wireless or do you mean wifi capable ?
Is there a need for two wifi stats ?

A wifi thermostat usually needs a C connection to the heating system. That would mean three wires are needed. You could also use a small plug in 24vac transformer near the thermostat for power.
Old 07-13-17, 04:06 PM
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I recommend a couple of Honeywell TH8321R thermostats.

It can meet almost any requirement. It can operate on only 2 wires, or function wirelessly if you get an EIM or have internet control if you add a gateway or support wireless sensors if you have an EIM or add a common wire.

Last edited by Houston204; 07-13-17 at 05:48 PM.
Old 07-13-17, 09:10 PM
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Honeywell is the still gold standard. If you go with something else you can install an add-a-wire solution such as https://www.fast-stat.net/ assuming you have standard 24vac thermostats.

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