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AprilAire 8446 Digital Thermostat

SKU: RP8446

Order now and we'll ship same business day (if ordered before 3 pm PST).


WARNING: Cancer and Reproductive Harm –


Take Control of HVAC and Heat Pump Systems

Control virtually any HVAC or heat pump system with the AprilAire 8446 Digital Thermostat. This digital thermostat is compatible with most HVAC systems, including single stage systems, multi stage systems, and heat pumps systems. The thermostat's 4.5 LCD screen displays indoor, target, and outdoor (via 8052 outdoor sensor, sold separately) temperatures, as well as notifications, messaging, and adjustable settings. This standard thermostat provides easy to use temperature control and air quality alerts to help you keep your indoor environment comfortable.

  • Digital thermostat offers on-demand temperature control with fan circulation mode
  • 4.5" LCD display presents easy to read measurements, messaging, and settings
  • Displays time, room temperature, target temperature setting, and optional outdoor temperature
  • Can be AC powered, battery operated, or both (battery backup for clock)
  • Internal memory backup retains settings in case of power interruption
  • Optional outdoor and/or indoor temperature reporting with additional sensors (8051, 8052, or 8053, sold separately)
  • Indicates service alerts for connected water panel, air filter, and dehumidifier components


  • Thermostat
  • Mounting Hardware

NOTE: Professional installation recommended.

AprilAire: Feel Good, Inside

It is the mission of AprilAire to provide superior Indoor Air Quality products for new and existing homes and businesses. AprilAire products are built to provide you and your family with the most comfortable home and the cleanest, healthiest air possible. Protect your home and your most valuable possession – your family.


  • Manufacturer Part #: 8446
  • UPC: 686720844607
  • Applicable HVAC Systems:
    • Standard systems gas, oil, electric
    • Single stage/heat pump/multi-stage
    • Millivolt systems


  • Control Range: 45° to 99°F (7° to 32°C)
  • Display Range: 32° to 99°F (0° to 40°C)
  • Accuracy: ± 1°F (± 0.5°C)
  • Storage Temperature: -30° to 140°F (-34.4° to 60°C)
  • Operating Humidity: 5% to 90% relative humidity
  • Operating Ambient Temperature: 32° to 120°F (0° to 48.9°C)
  • Shipping Temperature Range: 30° to 140°F (-34.4° to 60°C)
  • Electrical:
    • 24 VAC (18-30 VAC)
    • 1 amp maximum load per terminal
    • 2.5 amp total maximum load (all terminals)
  • AC Power: 18-30 Volt AC
  • Dimensions: 5.25 H x 4.50 W x 1.00 D inches
  • Approvals: FCC, IC
  • Warranty: 5-Year Limited