Smart thermostat

[TheProfessor]

"No C-wire? Install a Nest thermostat at your own risk"

LINK

[mswlogo]

Originally Posted by TheProfessor

"No C-wire? Install a Nest thermostat at your own risk"

LINK

This is a more robust solution to no C-wire for Nest. Basically you add a local 24V power near the thermostat. It's just more convenient if you have a C wire.

https://store.google.com/product/nes...ector?hl=en-US

[LakeTimes]

and for those that have Electric heat - they now have smart thermostats. Used to just be 24v which Nest and Ecobee take care of, but now they have come out with ones that work with high / "InLine" voltage (120v or 240v). Literally just ordered 8 Mysa's last week as they just launched their V2 in September and are having a Thanksgiving Sale.

For those that are interested:
https://getmysa.com/

[persamp]

I have 2 Nests at my home in MA and 2 more at my place at the lake. In MA, they are 2 wire (heat only) installations. For one zone, I needed to use a resistor to jump between the red wire and common power input on the zone control board. The other worked fine without the resistor (different zone valves - I don't know why...they pre-date my ownership)

In NH, I needed to connect the c-wire to the air handler and T-stat - luckily, the t-stat cables each had an extra wire that I could use for the c-wire connection.

If you live in MA, you can get a great deal on Nest T-stats through Mass Save.

Both setups have been working without issue for 10+ years (MA) and 8+ years (NH)

[mswlogo]

Originally Posted by LakeTimes

and for those that have Electric heat - they now have smart thermostats. Used to just be 24v which Nest and Ecobee take care of, but now they have come out with ones that work with high / "InLine" voltage (120v or 240v). Literally just ordered 8 Mysa's last week as they just launched their V2 in September and are having a Thanksgiving Sale.

For those that are interested:
https://getmysa.com/

I wanted the Nest on my Electric Baseboard. So I did

[chachee52]

https://www.amazon.com/Transformer-T...7MT5VWQN&psc=1

If you don't have the c-wire you can get this as I mentioned before.
My house doesn't have one and this is what I did. It was easier than snaking wire all around to pull it up from the basement.

[mswlogo]

Originally Posted by chachee52

https://www.amazon.com/Transformer-T...7MT5VWQN&psc=1

If you don't have the c-wire you can get this as I mentioned before.
My house doesn't have one and this is what I did. It was easier than snaking wire all around to pull it up from the basement.

Quote from Nest.

“Warning: Some 3rd party C wire adapters can cause problems or damage your Nest thermostat, even if they claim to be Nest compatible. We recommend using a Nest Power Connector to ensure compatibility and best performance with your thermostat.”

Unless the Thermostat has an isolated 24V PAIR of inputs you are asking for trouble. If it depends on a C wire for power you are mixing two 24V systems.

Some thermostats do allow for a simple external power with separate terminals or a jumper. Only use that if the manual clearly states it accepts a separate 24V source. Nest does not.

[tis]

Forget about wiring it. I can't figure out how to set it!!!!!

[FlyingScot]

Originally Posted by tis

Forget about wiring it. I can't figure out how to set it!!!!!

If you are trying to set it using the device itself, switch to the app. If the app is tricky for you, try the online website on your computer. If that is challenging, try getting the help of a younger family member

[chachee52]

Originally Posted by mswlogo

Quote from Nest.

“Warning: Some 3rd party C wire adapters can cause problems or damage your Nest thermostat, even if they claim to be Nest compatible. We recommend using a Nest Power Connector to ensure compatibility and best performance with your thermostat.”

Unless the Thermostat has an isolated 24V PAIR of inputs you are asking for trouble. If it depends on a C wire for power you are mixing two 24V systems.

Some thermostats do allow for a simple external power with separate terminals or a jumper. Only use that if the manual clearly states it accepts a separate 24V source. Nest does not.

Sorry, just figured all Smart ones were about the same. Maybe this is why I didn't look into the Nest when I was looking into them?