What thermostat temperature differential will cause my HVAC system to turn on with Ecovent?

This depends on your home. Ecovent's main goal is to provide you with maximum comfort, but do so in a way that will be safe for your HVAC system. The smart hub looks at the climate in every room to decide how to control your thermostat. Ecovent's proprietary control algorithm also prevents "short cycling" of your HVAC system.