1-Week Programmable Thermostat RTHL221B

DIY Install
This 1-Week Programmable Thermostat keeps it simple. Convenient features such as one-week programming and precision temperature control make it a clear choice.
Verify compatibility with your home heating and cooling system, remove your existing thermostat and follow step-by-step instructions for installation.
Simple programming. Easy to use.

Imagine the KISS principle applied to thermostats, and that’s what you get with our 1-Week Programmable Thermostat. It offers basic operation in a sleek one-piece design. You can set a program for the entire week with up to four periods per day, accounting for sleep, wake, leave and return. Features like display options for temperature and time, as well as precision comfort control, add to the thermostat’s simplicity and comfort.

  • Simple programming (one program for entire week, plus four periods per day)
  • Easy to use
  • Display options (Celsius or Fahrenheit temperature — 12- or 24-hour clock)
  • Sleek one-piece design
  • One-year warranty
  • DIY installation
Precision Temperature Control
Within +/-1 degree F for maximum comfort
  • Model number: RTHL221B1016
  • Color: White
  • Dimensions: 4-3/4 in. wide x 3-3/8 in. high x 1-1/8 in. deep

Compatible with systems

  • This thermostat is compatible with low volt heating/cooling systems.
  • It is not compatible with multi-stage heating/cooling, heat pump systems or electric baseboard heat (120/240V).

Follow the quick installation guide that comes with the 1-Week Programmable Thermostat RTHL221B. If you misplaced this guide, you can find it in the resources section below. Installation is fast and easy. Remove your old thermostat, but be sure to label the wires. Install and wire your new thermostat. Set your new thermostat to match your heating/cooling system.