Aprilaire® Wi-Fi Thermostat with IAQ Control, Series: 8840, 18 - 30 VAC, 1 - 2.5 A Maximum, 5 A Surge, 7 day Program Programmability, Auto Changeover, 3 Heat/3 Cool, 4 Heat/2 Cool Heat Pump -Stage, Large Touch Screen with Backlight Display, Temperature Settings: 40 - 90 deg F Heating, 50 - 99 deg F Cooling, 32 - 120 deg F Ambient, 5 - 90% RH Non-Condensing Humidity

• Temperature control
• Remote access and control over Wi-Fi
• Indoor air quality control - humidification automatic or manual control, dehumidification, Event-Based air cleaning, ventilation with temperature and humidity limits
• Heat blast raises the room temperature 3 - 5 deg F
• One touch away
• Air filter, humidifier, dehumidifier, fresh air and HVAC service reminders
• Programmable fan control with fan circulation mode
• Easy-to-use temperature control can override program schedule at any time
• Progressive recovery ensures proper temperature at the start of a program event
• 300 ft maximum distance outdoor, remote, leaving and return temperature sensor
• 32 - 99 deg F display range of room temperature measurement
• -40 to 160 deg F display range of room and leaving temperature measurement
• 10 - 50% RH humidification and 40 - 90% RH dehumidification setpoint humidity range

• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/Aprilaire_8840M_Manual.pdf