Jackson Systems

Aprilaire 8448 Non-Programmable Heat Pump Thermostat

BRAND: Aprilaire SKU: 8448

This product has been discontinued by the manufacturer


Model 8448 is universal and will control – Standard Systems gas / oil / electric. Single Stage/Heat Pump/Multi-Stage, Millivolt Systems


  • Large 4.5 square inch LCD with high contrast for easier reading
  • Controls 3 Stages Heat / 2 Stages Cool
  • Bright, white backlit display is easy to read
  • Displays room temperature, temperature setting and outdoor temperature (with 8052 sensor) simultaneously
  • Removable battery cover for fast, easy replacement
  • Dual fuel operation built in – eliminates need for a dual fuel kit (requires 8052 outdoor temperature sensor)
  • Dual Powered…choice of battery powered or hardwired, for all applications
  • Easy-to-wire terminal block
  • Millivolt compatible
  • Outdoor temperature (requires 8052 outdoor temperature sensor)
  • Permanent memory retention during power outage
  • Water panel, air filter, dehumidifier and HVAC service indicators
  • Simple "set-up" menu to activate optional features
  • Soft-touch keys
  • Circulate fan mode (if the fan has been off for 20 minutes the fan will be activated for a 10 minute cycle. Use this mode for a balance of energy savings and air circulation/cleaning)
  • Compressor lockout protection
  • Quick reference instructions on board
  • Display temperature offset (+/-4º)
  • Fahrenheit & Celsius
  • Configures as manual heat/cool, or with auto changeover
  • 5 year warranty
  • Adjustable differential for 1st, 2nd, 3rd stage


  • Terminals: Rc, R, W, Y, G, C, S1, S2, 0/B, L, W2, Y2
  • Operating voltage 24 VAC (18 – 30 VAC)
  • Current – Maximum: 2.5A (total), 1.0A (single output)
  • Maximum surge current: 5A
  • Power supply Dual power. Can be battery or 24 VAC powered (When both the sources are available, battery will be used as back up power.)
  • Battery power: AA size alkaline battery x 2
  • Battery life: Approximately 1 year
  • Outdoor temperature sensor Maximum distance: 300 feet
  • Room temperature measurement Display range: 32° to 99°F (0° to 40°C)
  • Outdoor temperature measurement Display range: -20° to 130°F (-30° to 55°C)
  • Temperature setting range
  • Heat: 45° to 90°F (7° to 32°C)
  • Cool: 50° to 99°F (10° to 37°C)
  • Dimensions: 5.25" x 4.50" x 1.00"

Features and Benefits

  • Up to 3H/2C conventional and heat pump systems
  • Large 4.5 in2 LCD screen with high contract for easy reading
  • Outdoor temperature reading (requires optional sensor #8052)
  • Circulate fan mode means fan comes one for 10 minutes every 30 minutes to improve indoor air quality and eliminate hot and cold spots
  • Service reminders for air filter, humidifier pad and service
  • Adjustable differential for 1st, 2nd and 3rd stage
  • Auto changeover
  • Hardwired or battery powered
  • 5-year warranty

Additional information

Power Type



Auto Changeover



Terminal Designations

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UPC 686720844805
Imprinting Available Yes


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