1-3 of 3 Answers
You should get 3.
Sorry, there was a problem. Please try again later.You need one for each current thermostat.
Sorry, there was a problem. Please try again later.The Nest Learning Thermostat works independently, so you could just install two and leave the existing third thermostat in the home without any issues. You can check for compatibility here: https://nest.com/support/article/How-to-tell-if-your-heating-and-cooling-system-will-work-with-the-Nest-Thermostat
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