Up to 2 Heat, 2 Cool Convnetional
Up to 3 Heat, 2 Cool Heat Pump 
Battery or Hardwire

7 Day, 5/1/1 or Non-Programmable
Compatible With Wired Remote Sensors

Simple. Affordable. Professional.


The display range of temperature:

41˚F to 95˚F (5˚C to 35˚C)

The control temperature range:

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 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

    • 7 Day, 5/1/1 Programmable or Non-Programmable

    • Easy menu-driven programming

    • Intuitive wake, leave, return, sleep programming icons

    • 4 sq. inch display

    • Blue back-light

    • Glow in the dark light button

    • Easy access battery compartment

    • Electric or Gas configurable 

    • Separate B & O terminals

    • Separate heating and cooling swing (cycle rate) adjustments

    • Filter change indicator (selectable on or off)

    • Room temperature calibration adjustments

    • 5-minute compressor delay protection (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

    • 5-year warranty

    • Universal 2H/2C Conventional or 3H/2C Heat Pump

    • Compatible with Indoor Remote Sensor (R251S) or Outdoor Remote Sensor (R250S)

    • Add Indoor Sensor(s) to move the System Sensing Point or Sense a System Average

    • Set Hardware Dual Duel Balance Point with Outdoor Remote Sensor (R250S)

    • Tightly Control Hydronic Radiant System with Slab Sensor (R250S)