Aprilaire 8444

Aprilaire® 8400 Digital Non-Programmable Thermostat, 45 - 99 deg F, +/-1 deg F Differential, Fan Switching Circulate


Manufacturer part number:



Aprilaire® 8400 Non-Programmable Thermostat, Digital, 45 - 99 deg F, +/-1 deg F Differential, Terminal Designations: RC, R, W, Y, G, C, S1, S2, Fan Switching: Circulate, 2 Stage, 24 VAC, 5 A, Battery/24 VAC Hardwired, 4-1/2 Inch L x 5-1/4 Inch W x 1 Inch H
  • Displays room temperature, temperature setting, and optional outdoor temperature
  • Front battery door access for fast, easy replacement
  • Air filter, humidifier, dehumidifier, and HVAC service indicators
  • A large 4-1/2 sq Inch LCD screen with a high contrast, backlit display for easy reading
  • Simple setup menu for activating optional features
  • Quick-reference instructions on board
  • Soft-touch keypad
  • Compressor lockout protection
  • Water panel, air filter, dehumidifier and HVAC service indicators

Application: Cooling and Heating Systems

Products specifications
Attribute nameAttribute value
Brand NameAprilaire®
Control Range45 - 99 deg F
Differential+/-1 deg F
Dimensions4-1/2 Inch L x 5-1/4 Inch W x 1 Inch H
Fan SwitchingCirculate
Full Load Current5 A
ManufacturerResearch Products Corporation
Number of Stages1 Heat/1 Cool
Power SourceBattery/24 VAC Hardwired
Terminal DesignationsRC, R, W, Y, G, C, S1, S2
Voltage Rating24 VAC