Is my power compatible with Nest Learning Thermostat?

[jmcg]

I am not sure my old wiring is compatible. Based on the photo of my existing thermostat, is this wiring compatible with the new Nest Learning Thermostat? Wires are G W and RH

Thanks in advance,

JMcG

My old thermostat

[CoolingWizard]

Your current thermostat only controls a heating system and the air handler blower fan. This system appears compatible with a nest thermostat. 

Ken, AC Cooling Wizard 

[jmcg]

Thank you Mr. Wizard!

[Jhonleanmel]

Hey folks, 

We appreciate your help here, @CoolingWizard.
@jmcg, I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any concerns or questions from here, as I would be happy to take a closer look and assist you further.

Thanks,
Mel

[EdwardT]

Hi folks,

I wanted to follow up and see if you are still in need of any help. Please let me know if you are still having any trouble from here, as I would be happy to take a closer look and assist you further.

Thanks,

Edward

[Jhonleanmel]

Hi everyone,

Just one quick final check in here since activity has slowed down. We'll be locking the thread in the next 24 hours, but if you still need help, I would be happy to keep it open. If there's more we can do, just let me know.

Thanks,
Mel