Maintain a comfortable living environment at home more easily than ever by controlling your HVAC system with the Aprilaire Wi-Fi Touchscreen Thermostat with Integrated IAQ Solution. Featuring the unique "SmartIAQ" solution by Aprilaire, this state-of-the-art Internet-connected thermostat is designed to balance all aspects of indoor air quality, including Temperature, Humidity, Air Purity and Fresh Air. The app, available free for iOS and Android devices, syncs with the thermostat to provide seamless control. The thermostat not only offers standard 7-day programming (up to 4 events per day), but also a "progressive recovery" feature that can activate your heating or cooling equipment BEFORE a scheduled event. The thermostat also provides auto-ventilation. You can set parameters that trigger ventilation, and/or take advantage of "Event-Based Air Cleaning". Additionally, this IAQ Thermostat Model 8820 offers these advanced capabilities: "Heat Blast" rapidly raises the room temperature. Message center provides feedback, instructions, service reminders. Lockouts (Full, Timed, Limited). Programmable fan control with fan circulation mode. Humidifier control (auto or manual). Whole-home dehumidifier control. Dehumidify w/AC controls dehumidifier on air conditioner. Remote sensing via Support Modules (sold separately). FEATURES: Universal for 2H/2C or 4H/2C heat pump. Auto changeover with deadband adjustment. Adjustable differential. Stage rate engages additional stages to achieve setpoint. Dual fuel kit allows switching between two equipment types. Balance point control allows optimization of heat pumps and aux heat. Built-in compressor protection. Adjustable backlight. 3-day weather forecast with pollen and mold levels. System test mode. Warranty: 5 Years. CONTENTS: Thermostat, Hardware. NOTE: Controls only one of these units per installation: ventilation, whole-home dehumidifier, or humidifier. Requires a computer or mobile device with Wi-Fi and a web browser.