The Google Nest Learning Thermostat works with advanced air conditioning systems that have their own dehumidification mode. The thermostat’s Cool to Dry feature gives you more direct control of your air conditioner’s dehumidification mode.
How to tell if your air conditioner has a dehumidification mode
The easiest way to tell if your air conditioner has a dehumidification mode is to look up the model on the manufacturer's website. A Nest Pro installer will also be able to determine if your air conditioner has a dehumidification mode, and we recommend Nest Pro installation for all dehumidifiers.
Important: If your thermostat has a DEHUM or dehumidifier wire, it doesn't mean that your air conditioner has a dehumidification mode. The wire could connect to a standalone dehumidifier that is separate from your air conditioner.
All air conditioners dehumidify your home by moving air across your air conditioner's refrigerated coils, cooling and drying the air. When in dehumidification mode, the AC's fan runs at a slower speed, removing moisture from the air without cooling the house as much as it does in its normal cooling mode.
How an air conditioner that has its own dehumidification mode works with the Nest thermostat
With Cool to Dry, your Nest thermostat gives you more direct control over your air conditioner's dehumidification mode. Cool to Dry lets you choose the relative humidity level you want in your home. Your thermostat helps keep you comfortable while working to get the most out of your advanced AC equipment.