Nest thermostat for property with two boilers?

[ericthelobster]

I'm looking at installing a Nest thermostat in a property which has a self-contained annexe. The annexe (new) has a two-zone underfloor wet central heating system with a gas combi boiler, and the main house (old) has single-zone wet central heating system (with standard radiators), warmed by a system gas boiler.
The plan is to really install a Nest in the annexe, which hopefully shouldn't be problematic? (Right?) However I just wondered whether while doing this, there was any way that I could also use it to control the main house as well, without installing an entirely separate system? Could it be treated as a 3rd zone?

Thanks

[Houptee]

Each heating system will need it's own thermostat and so will each zone. It needs a thermostat to sense the temperature of the area being heated.

I think you wanted to use only 1 nest for the 2 zone system and the boiler system?

No that will not work.

Depending where you live the gas and electric companies usually have nest for under 20 bucks sometimes even free.

[Jhonleanmel]

Hey folks,

We appreciate your help here, @Houptee.
@ericthelobster, 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

[EmersonB]

Hi everyone,

@ericthelobster I'm dropping by to ensure that everything is covered here and wanted to follow up to see If you have other questions and concerns.

Thanks for lending a hand, Mel and Houptee.

Best,
Emerson

[EmersonB]

Hi ericthelobster,

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.

Regards,
Emerson