topic Re: Nest Compatibility in Nest Thermostats

Nest Compatibility

questions24 — Sat, 10 Dec 2022 01:42:31 GMT

Best I can tell from the app I need to install a Nest Power Connector but would like to confirm. I have a conventional heating system.

Re: Nest Compatibility

Houptee — Sat, 10 Dec 2022 02:55:32 GMT

Yes you need a C wire for the nest E model.

Is there a spare color wire in the old cable or is it just 2 conductors red white?

If you can pull a new 5 conductor thermostat wire to the Nest it is best way to solve the C wire problem.

Re: Nest Compatibility

questions24 — Sun, 11 Dec 2022 05:47:33 GMT

Correct, just white and red conductors, nothing else.

The C wire just supplies power right? So two questions:

1) Since the Nest E has batteries, so does it really need power? I assume all it's doing to turn the heat on is shorting the wires which would take almost no power.

2) If the Nest E needs constant power, do I need to pull a new cable from the furnace through or can I just use an external 24V power supply from a an outlet and provide power to the Nest using that?

Something like this (I would cut the plug off and wire directly to the nest):

https://www.amazon.com/ALITOVE-Supply-Adapter-100-240V-Converter/dp/B07VL8W6MQ/ref=sr_1_4?keywords=24v+wall+wart&qid=1670737421&sr=8-4

Since I'm renting my apartment but also want a Nest and have to install it myself, the less wire harnesses I have to pull through the better. Temporary is ok 🙂

Re: Nest Compatibility

EdwardT — Wed, 14 Dec 2022 02:27:02 GMT

Hi folks,

@Houptee, thanks for the help!

@questions24, thanks for reaching out. The Nest Thermostat E needs constant power for the thermostat itself. If there's no existing wires that we could repurpose as a C wire, we recommend looking into the Nest Power Connector.

Thanks,

Edward

Re: Nest Compatibility

EdwardT — Tue, 20 Dec 2022 01:42:01 GMT

Hi questions24,

It's me again. I wanted to check back in to see if you have other questions and concerns. Feel free to let me know if you do.

Thanks,

Edward

Re: Nest Compatibility

EdwardT — Wed, 21 Dec 2022 01:46:34 GMT

Hi questions24,

I'm just checking in to make sure that you've seen our response. Please let us know if you have any other questions or concerns as I will be locking this in 24 hours.

Thanks,

Edward