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Is Nest Learning Thermostar 24V compatible with Heat Link

Community Member

Unfortunately, i didn’t realize my gas furnace works with 220V (2 wire) thermostat system and I bought a Nest Learning 24V, which is not compatible. I only have a furnace (not AC).
This kind of set up are common in EU, therefore Google Nest Learning comes with additional Google HEAT LINK that makes Nest Thermostat available to work on 2 wire 230v system. BUT, the base of the Thermostat is different from the one sold in US as 24V, meaning the 24V version comes with wiring for  Y1, Y2, G, OB, RC, W1, W2aux, C, *, RH, but the 230v (EU standard) comes with just T1 and T2. 
So far what I have read is 24V is compatible with 2 wires, working with RH and W1 conections.

- Does the HEAT LINK (EU standard) compatible with 24V (USA Standard) Nest Learning Thermostat?
- Are T1 and T2 wires, from nest wiring base  for EU Standard, the same as RH and W1, from nest wiring base  for EU Standard?
- How does HEAT Link work with two Nest Learning thermostat?

I really want to have the Nest Thermostat working at my house.
PS: Do not consider that I'm returning the Nest Thermostat, I do not live in USA nor EU.


Community Specialist
Community Specialist

Hi there @Camilo_GL_1976, thanks for reaching out. To respond to your questions, in order: The Heat Link is not compatible with the USA version of the Thermostat, T1 and T2 are not the same with RH and W1 and the Heat Link is not built to work with two thermostats and even though it is possible to do so, it will surely malfunction over time. In order to have a Nest Learning Thermostat function with your system, you'll need a full EU version unit. Would there be anything else I can do to assist you?

Community Specialist
Community Specialist

Hi there, just checking in. Have you seen my previous message?

Community Specialist
Community Specialist

Hi there, just checking in with you. As you haven't replied, I'm gonna go ahead and close the thread. If you need anything else, please let me know. Have a great day ahead!