The Model 8820 Touchscreen Wi-Fi Automation Thermostat w/Integrated IAQ Solution is a state-of-the-art, Internet-connected precision control module designed to balance all aspects of indoor air quality, including Temperature, Humidity, Air Purity and Fresh Air. The app syncs with the Touchscreen Wi-Fi Thermostat module to provide seamless control. Additionally, not only does the 8820 module offer standard seven-day programming with up to four events per day, it also features a Progressive Recovery feature that can activate your heating or cooling equipment before a scheduled event. You can set parameters that trigger ventilation and/or take advantage of Event-Based Air Cleaning. Its Heat Blast function rapidly raises the room temperature. Its message center provides feedback, instructions and service reminders. It has programmable fan control with fan circulation mode, humidifier control (auto or manual), grow room dehumidifier control and remote sensing via Support Modules DH18082 (sold separately).