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PRO1 IAQ T855 Universal Electronic Thermostat

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  • Universal Programmable or Non-Programmable Thermostat
  • Heat Pump or Conventional
  • 7-Day or 5/1/1 Programmable
  • Replaces the following thermostats: T-805, PD411065, PD411065-1PK, 662766469943, 662766590418, TP-S-855C VIVE Comfort Thermostats
  • Dimensions of thermostat: 4.7"W x 4.4"H x 1.1"D

The PRO1 T855 Thermostat offers a reliable thermostat at an affordable price; programmable or non-programmable. Our environment is important to all of us , PRO1 products are a great choice to improve the comfort of your indoor of all, you should realize a savings on your electric bill.  Smart , Efficient , Eco-Friendly...quality has never been so affordable.


  • Auto Changeover

  • Easy menu driven programming

  • Intuitive wake, leave, return, sleep programming icons

  • 8 sq. inch display with blue backlight

  • Glow in the dark light button

  • Programmable fan

  • Electric or Gas configurable

  • Room temperature calibration adjustment

  • Separate heating and cooling swing (cycle rate) adjustments

  • Keypad lockout

  • Heating and cooling setpoint limits

  • 5 minute compressor delay protection (selectable on or off)

  • Filter change indicator(selectable on or off)

  • Simple private label badge system

  • Easy wire color coded terminal blocks

  • Universal sub-base

  • Mounts on wall or junction box

  • Battery or 24v power


Free Shipping Next Business Day

Customer Reviews

Based on 1 review
miguel croce

install new thermostat working great I can control cooling know

thank you