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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.
Using a programmable thermostat is one of the easiest ways to reduce energy costs.
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.
|24-VOLT HEATING AND AIR CONDITIONING SYSTEMS|
|Single-Stage Heating and Cooling||Multistage Heating and Cooling|
|Heating Only||Cooling Only|
|Furnace (Warm Air)||Central Air Conditioning|
|Heat Pump without Auxiliary Heat||Heat Pump with Auxiliary Heat|
|Hot Water||Steam or Gravity|
|750 Millivolt||Gas Fireplaces |
(24 Volt or 750 Millivolt)
|Electric Baseboard Heat |
(120 - 240 Volts)
A Honeywell programmable thermostat can save you significant money off your energy bill. 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 heating and cooling equipment runs less. This one-piece thermostat has one easy program for all days of the week (4 periods - wake, leave, return, sleep). Simple and effective use and performance.
REPLACED OLD MANUAL ONE WITH THIS ONE. WORKS WELL BUT A LITTLE DIFFICULT TO SET TEMPERTURES, CONFUSING
ALL IN ALL THIS PRODUCT DOES THE JOB VERY WELL
Sent me not working one. This didn't work. I didn't know that I got the bad one. I called handy man spent a few hundred bucks for repair. Don't buy this product.Published 2 months ago by RaLak
Here's the problem with this thermostat: it only meets the set temperature within 2 degrees. In other words, you set it to cool to 78 degrees, and you will find your system still... Read morePublished 3 months ago by Dixiecal
This is an easy to install and use device. I have mine setup to control a 24VDC relay in the cool mode. It has been in service for three + years with no problemsPublished 6 months ago by Larry L kelly
For the most part it's pretty good.
From a user perspective, I would not recommend installing this unless you have a very brightly-lit location. Read more