A simple, easy to use 1-week programmable thermostat. A programmable thermostat can save you up to 33-Percent off your energy bill, if used as directed. You set it up to adjust the temperature when you are away or asleep-times when you don’t necessarily need to heat or cool your home to optimum comfort-and your HVAC
A simple, easy to use 1-week programmable thermostat. A programmable thermostat can save you up to 33-Percent off your energy bill, if used as directed. You set it up to adjust the temperature when you are away or asleep-times when you don’t necessarily need to heat or cool your home to optimum comfort-and your HVAC equipment runs less. Plus, your heating or cooling comes back to the comfort level you desire before you come home or wake up. Honeywell programmable thermostats are easy to install and are pre-programmed for your convenience. For more than a century, Honeywell thermostats have been the popular choice of homeowners. This thermostat is compatible with single-stage heating/cooling systems, heating, cooling, heat pumps without backup heat, mill volt, pellet stoves and fireplaces. It does NOT work with electric baseboard heat (120-240 V), heat pump systems with backup heat or multi-stage heating/cooling. 
• Easy to read display • Precise temperature control • Slim, compact design
The Honeywell RTH221B thermostat is a simple, easy to use 1-week programmable thermostat. This one-piece thermostat has one easy program for all days of the week (four periods — wake, leave, return, sleep). A programmable thermostat can save you up to 33 percent off your energy bill, if used as directed. You set it up to adjust the temperature when you are away or asleep-times when you don’t necessarily need to heat or cool your home to optimum comfort-and your HVAC equipment runs less. Honeywell programmable thermostats are easy to install and are pre-programmed for your convenience.
Features: Simple Programming — one program runs for the entire week (four periods per day) Easy-To-Use — basic operation keeps programming easy Works with heating and cooling systems Does not work with heat pump systems or electric baseboard heat (120-240 volts) 1-year warranty
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Very easy to install and works well I wanted a simple to install thermostat to replace the aging, mercury switched Honeywell items that control our heat and cooling. After researching I decided that a simple weekly timer is good enough, and certainly better that what we had originally. The RTH221B shows the current temperature and can be set to adjust the temperature when you wake, leave, return and night. It is simple to use with 15 minute increments.Installation says “15 minutes or under” and I found this to be true.To install: Turn off power to furnace and thermostat (although it is a low voltage feed, you MUST still do this) Unscrew the original thermostat from the wall but leave wires attached Check the color of the wires and which terminals they attach to on the original (look for small letters W,R,Y,Rc etc) Mark the wires (if needed) with the stickers provided in the package Unhook wires from the original Remove backing plate from new…
Simple Enough but Lacks Backlight 0