Skip to main content
  • Home
  • AprilAire 8840 Automation Thermostat, 7" Color Touchscreen, WiFi, IAQ Control

AprilAire 8840 Automation Thermostat, 7" Color Touchscreen, WiFi, IAQ Control

SKU: RP8840

IN STOCK! Ships same business day if ordered before 3pm PT

WARNING: Cancer and Reproductive Harm –

Product Description

AprilAire 8840 Automation Thermostat, 7" Color Touchscreen, WiFi, IAQ Control is the industry's first color touch screen with all control options on the home screen.

  • Universal 3H/3C or 4H/2C HP
  • Event-Based Air Cleaning
  • Humidity and Ventilation
  • 2-Part, 3-Wire design
  • Wi-Fi with full color touch screen

Clean and simple, the AprilAire Wi-Fi Thermostat app has intuitive temperature control features designed so anyone can understand and use them to effectively deliver comfort and energy savings.

But that's not all. AprilAire, the number one provider of indoor air quality solutions, also offers SmartIAQ: the ability to balance all aspects of indoor air quality, including Temperature, Humidity, Air Purity and Fresh Air.

AprilAire SmartIAQ

AprilAire SmartIAQ is an industry-leading design focused on consumer usability; providing users information when and where it's needed. Options can be selected that automatically control the indoor environment based on the needs of each individual consumer's home and family. And, when events occur in the home that affect indoor air quality, the AprilAire exclusive Event-Based control options make managing and improving the air quality simple.

Industry-Exclusive Features:

  • Ability to control temperature and all IAQ equipment
  • Event-Based Air Cleaning and Fresh Air Ventilation
  • Automatic humidifier control with accurate ODT control points
  • Automatic dehumidifier control
  • Temperature overrides for instant comfort ("Heat Blast") and maximum energy savings ("Away")
  • All screens display the status of all IAQ and HVAC equipment
  • 3-Day weather forecast with pollen and mold levels
  • Features disabled from thermostat are automatically removed from the app
  • Informs homeowners on the benefits of IAQ control
  • "Product Not Installed" screen suggests additional IAQ products
  • Easy to identify and access "Help" screens

Model 8840 Features:

  • 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°F to 5°F.
  • One touch Away mode.
  • Large touch screen with adjustable backlight.
  • 7 day programmability.
  • Displays room temperature, room humidity, temperature setting, and optional outdoor temperature.
  • Air filter, humidifier, dehumidifier, fresh air and HVAC service reminders.
  • Support for optional wireless outdoor temperature sensor.
  • 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.

In The Box:

  • Thermostat
  • Installation accessories

NOTE: You will need a computer or mobile device with Wi-Fi and a web browser.

Tech Specs

  • Part Number: 8840
  • UPC: 686720884009
  • Approvals: FCC, IC, ASHRAE
  • Warranty: 5-Year Limited


  • Temperature:
    • Thermostat (Operating): 32° to 120°F (0° to 48°C)
    • Temperature Equipment Control Module (Operating) 32° to 158°F (0° to 70°C)
    • Shipping: -30° to 150°F (-34° to 65°C)
  • Operating Humidity: 5 to 90 percent relative humidity (RH) non-condensing


  • Operating Voltage: 24 VAC (18 – 30 VAC)
  • Current:
    • Maximum: 2.5A (total), 1.0A (single output)
    • Maximum Surge: 5A


  • Outdoor, Remote, Leaving and Return Temperature Sensor: Maximum distance: 300 feet
  • Room Temperature Measurement: Display range: 32° to 99°F (0° to 40°C)
  • Return and Leaving Temperature Measurement: Display range: -40° to 160°F (-40° to 71°C)
  • Outdoor Temperature Measurement: Display range: -40° to 130°F (-40° to 55°C)
  • Setpoint Temperature Range:
    • Heat: 40° to 90°F (4° to 32°C)
    • Cool: 50° to 99°F (10° to 37°C)
  • Setpoint Humidity Range:
    • Humidification: 10 to 50 percent RH
    • Dehumidification: 40 to 90 percent RH

Product Docs