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Feature Friday: Free Cooling

by on June 12, 2015

If you have installed a ventilator and configured it as an accessory on your ecobee3, you can cool your home for free without running your air conditioner.

On summer nights, the outside air is often cooler than the air inside your home. If ecobee3 detects the outside air is cooler than the inside air and your system is calling for cooling, your thermostat will activate Free Cooling. This will bring in the cooler air from outside to help keep your home comfortable while saving you energy and money. 

To configure your ventilator on the web portal, select System > Ventilator/HRV/ERV. 

To configure your Free Cooling settings with a ventilator on ecobee3, make sure that you have properly set up a ventilator as an accessory on your thermostat. Then, tap Main Menu > Settings > Installation Settings > Equipment > Ventilator.

Please keep in mind that ERV’s and HRV’s do not support Free Cooling.

Under the Ventilator menu on the thermostat, you can configure the following settings for Free Cooling:

Free Cooling Max Outdoor Temperature: This prevents Free Cooling from running when the outdoor temperature is too high.

Free Cooling Max Outdoor Humidity: This prevents Free Cooling from running when the outdoor humidity is too high. By default, this option is disabled. If you set this to Auto, ecobee3 will determine the maximum allowed humidity level based on the temperature.

Indoor/Outdoor Temperature Delta: This is the difference between the indoor and outdoor temperatures when the ventilator can run.

Max Set Point Temperature Delta: This is the maximum allowed difference between the current temperature and the desired temperature for Free Cooling to function. By default, this option is disabled.