|Item Weight||5.6 ounces|
|Product Dimensions||11 x 7.5 x 9 inches|
|Item model number||RTH221B|
|Item Package Quantity||1|
|Warranty Description||1 Year Product Warranty|
|Assembled Diameter||1.1 inches|
Honeywell RTH221B Basic Programmable Thermostat
|Price:||$45.89 & FREE Shipping. Details|
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- Installation of 1 customer-supplied thermostat
- Proper disposal of replaced thermostat
- Testing new thermostat for proper function
- Instructions on proper use
- Pro will contact you within 1 business day to schedule
- Kick back and only pay when the job is done
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- 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
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Using a programmable thermostat is one of the easiest ways to reduce energy costs.
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.
|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)
From the Manufacturer
Top Customer Reviews
I had never installed a thermostat before, but it was a breeze to install. I turned off the breakers to my living room, carefully removed the old thermostat, attached two wires, installed a couple of screws (I think that I ended up drilling one new hole), and turned the power back on. Less than 15 minutes from start to finish, and I'm not the handiest gal you'll ever meet. It worked. I set it to turn down at night while we're sleeping and during the day when we're gone. I also put the plastic on the windows, but other than the new thermostat I did nothing different this year than last.
February 2008- the portion of our utility bill for natural gas was $188.03. February 2009, with the average temperature just 4 degrees warmer, our natural gas bill was $88.08. We have saved at least $40 every month since I installed it. It's paid for itself several times over. It's probably the best thing I've purchased in a very long time.
I wanted a vertical style to match the placement of the old one which narrowed the field considerably. I wanted a simple day/night setback and didn't need separate settings for weekends. I wanted simple controls and ease of temporary adjustment. This one fit the bill perfectly.
Installation was a breeze. The instructions are clear and easy to follow. My two-wire system connected to the Rh (Red - heat) and W (White) terminals. The wires weren't that color (probably the original 90 year old wires!) so I either guessed right or, more likely, it would have worked if they were reversed since it's simply an open/close switch to activate the heater. I even reused the mounting screws from the old unit - sweet! Stop by your local Dollar Store and pick up a mini screwdriver set if you don't have one.
Programming is straightforward, and again the instructions are clear. It comes preprogrammed with four periods - Wake, Leave, Return, and Sleep. It's easy to adjust these to your desired time/temp. I skipped two of them completely by simply pressing the Hold button for four seconds while that period was displayed during setup. Believe me, you'll be tweaking your settings with abandon after the first run-through... it's that easy.
I love the simplicity of the display. What's the current temp? Look at the screen. You're a bit cold? Tap the up arrow once and read the setpoint; tap it again to temporarily raise the setpoint one degree, again for two degrees, etc.Read more ›
The apartment that received the RTH221B is a simple heat-only, oil-fired steam radiator system. The installation instructions were generally easy to follow, but I also found additional information on the Honeywell website explaining what each terminal actually was. It would have been useful for Honeywell to print this in the instructions. Summarized:
Rh : Heating power supply
Rc : Cooling power supply
W : Heating signal
Y : Cooling signal
G : Fan
Both of the two environmental systems in my home are ONLY heat, and have a two-wire connection.Read more ›
Most Recent Customer Reviews
This was exactly what I was looking for. Product works fine. Seller exceeded shipping expectations.Published 13 days ago by Amazon Customer
Great stat but lightening kills them all. I'm back to round Honeywells.Published 1 month ago by Steve
Specifically ordered the older, more expensive VERTICAL model of the RTH221B shown in the vendors photo. Read morePublished 1 month ago by Gill
This thermostat is great as you can heat your house by day and let it get cool at night all on its own once you program it. Easy to use and it will save you money on energy costs.Published 3 months ago by Amazon Customer
Thankful to find a vertical t-stat. Works well. Reasonably priced.Published 4 months ago by Stephen B.
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 7 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 9 months ago by Dixiecal