Pro1 T721 Thermostat




   Heat Pump
   2 Heat 1 Cool
   Battery or Hardwired 






  • 4 sq. inch display

  • Blue backlight

  • Glow in the dark light button

  • Easy access battery compartment

  • Electric or Gas configurable 

  • Separate heating cooling swing (cycle rate) adjustments including 2nd stage adjustments 

  • Filter change indicator (select-able on or off)

  • 5 minute compressor delay protection (select-able on or off)

  • Room temperature calibration adjustments

  • Simple private label badge system

  • Easy wire color coded terminal blocks

  • Universal sub-base

  • Mounts on wall or junction box

  • Battery or 24V power

  • 5 year warranty


Version 1.0

T805 Installation Manual T805 Operation Manual


Version 2.0

T805 Installation Manual T805 Operation Manual







800 Family Brochure Pro1 Linecard



T721 Thermostat
The display range of temperature 41°F to 95°F (5°C to 35°C)
The control range of temperature 44°F to 90°F (7°C to 32°C)

Load rating

1 amp per terminal, 1.5 amp maximum all terminals combined
Display accuracy ± 1 °F 
Swing (cycle rate or differential) Heating is adjustable from 0.2°F to 2.0°F 
Cooling is adjustable from 0.2
°F to 2.0°F 
Power source 18 to 30 VAC, NEC Class II, 50/60 Hz for hardwire (common wire) 
Battery power from 2 AA Alkaline Energizer batteries 
Operating ambient

32° to +105° (O° to + 41°C) 

Operating humidity

90% non-condensing maximum

Dimensions of thermostat

4.7"W x 4.4"H x 1.1"D