Nest thermostats on a 2-wire system?

[farmantenna]

I don't know the details but power connectors have worked for me. Never heard back from the home owners. I figured it provided power to the Nest and used a communications signal to the Power connector that processed the signal to a discreet output

 

[hbiss]

I don't know the details but power connectors have worked for me. Never heard back from the home owners. I figured it provided power to the Nest and used a communications signal to the Power connector that processed the signal to a discreet output

No, nothing as exotic as that. I'm sure all it does is put suitable power on the W and R to the thermostat, when it's not calling, from the 24vac that's on the C and R on the boiler or furnace control.

Question is why is that thing such a power hog. Every other thermostat works fine.


-Hal

 

[Eddie702]

Most HVAC contractors I know hate Nest. They seem to be lees hateful against Ecobee.

 

[retirede]

Maybe they should stick with what they do best- spying on you.

-Hal

That’s what they do with the Nest. It’s all part of it.

 

[OldBroadcastTech]

Hal said " That's why most other thermostats use a couple of replaceable AA batteries. But that's so low tech."

But for some, its Oh So Much Trouble to pick up a couple of AA's on Sept 1 and replace them.....I have two Honeywell's and it takes 15 minutes to go get a 4-pack of the batteries and 5 minutes apiece to replace them.....Old Tech / Low Tech but it works......reliably.