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Technical Details :
  • All control buttons are on the face of the product with a display that shows current and set temperatures
  • Precise temperature control of +/- 1 degree F
  • Basic one programmable with four programmable periods per day
  • Vertical positioning for easy upgrade from standard manual thermostats
  • One-touch hold
Product By Honeywell
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Product Description :

Offering the ease and reliability of basic programming, the Honeywell RTH221B One-Week Programmable Thermostat can help save money on your energy bills--without sacrificing your comfort. Featuring a sleek one-piece design that blends seamlessly with any decor, the RTH221B is compatible with most heating and cooling systems.

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RTH221B One-Week Programmable Thermostat
At a Glance:
  • Basic operation keeps programming easy

  • 4 program periods per day

  • Precise temperature control of + /- 1 degree

  • For use with central gas, oil, or electric furnaces and AC

  • 1-year warranty
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Honeywell RTH221B One-Week Programmable Thermostat
Using a programmable thermostat is one of the easiest ways to reduce energy costs.
Precise, Programmable Temperature Control
The RTH221B lets you control the temperature inside your home, even when you're not there. In just minutes, you can create one simple program that will run for the entire week, with up to four program periods per day (wake, leave, return, and sleep).

For further convenience, the RTH221B gives you precise temperature control plus or minus one degree Fahrenheit, so you can create the atmosphere that's perfect for you.

Save up to 33% on Annual Heating Costs
Using a programmable thermostat is one of the easiest and least expensive ways to reduce energy costs and protect the planet--without sacrificing personal comfort.

By creating a program that automatically adjusts the temperature during times when optimum comfort is not necessary (e.g. when you're sleeping or away from home), you can significantly cut down on your overall energy usage and reduce your monthly bills. In fact, depending on your geographic region and usage patterns, the RTH221B can help you save up to 33% on annual heating costs.

User-Friendly, One-Piece Design
One of the RTH221B's key advantages is its user-friendly, one-piece design. All control buttons are visible on the front of the unit for quick and easy accessibility, and the display clearly shows current and set temperatures. Soft-touch/one-touch hold buttons keep things simple, while vertical positioning makes for an easy upgrade from standard manual thermostats.

Compatibility and Warranty Information
The RTH221B works with central gas, oil or electric furnaces, AC, and millivolt systems. It is not compatible with multi-stage heating/cooling systems, heat-pump systems, or electric baseboard heat (120 - 240 volts).

The Honeywell RTH221B One-Week Programmable Thermostat and is backed by a one-year warranty.

What's in the Box
Honeywell RTH221B One-Week Programmable Thermostat; mounting hardware; warranty card; and manual.


COMPATIBILITY
24-VOLT HEATING AND AIR CONDITIONING SYSTEMS
Single-Stage Heating and Cooling yesMultistage Heating and Cooling 
Heating OnlyyesCooling Onlyyes
Furnace (Warm Air) yes Central Air Conditioningyes
Heat Pump without Auxiliary Heat Heat Pump with Auxiliary Heat  
Hot Water yes Steam or Gravity yes
750 Millivolt yes Gas Fireplaces
(24 Volt or 750 Millivolt)		 yes
Electric Baseboard Heat
(120 - 240 Volts)		      

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Honeywell RTH221B Basic Programmable Thermostat