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Honeywell RTH221B1021/E1 RTH221B1021/A 1 Week Programmable Thermostat
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- One program for the entire week-4 periods per day
- Digital display;Dimensions: 3-3/8 inches wide x 4-3/4 inches. high x 1-1/8 inches deep.
- Compatible with heating, cooling and heat pumps without auxiliary heat, Does not work with electric baseboard heat (120-240V) multistage HVAC systems
- Accurate temperature control of +/-1-Degree F for consistent comfort
- Display options: Fahrenheit or Celsius temperature display, 12 or 24 hour clock
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A simple, easy to use 1-week programmable thermostat. 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.
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|Sold By||Amazon.com||Amazon.com||Amazon.com||ProWholeSaleNY Fulfillment||Amazon.com||Saswell Control|
|Are Batteries Required||Yes||Yes||No||Yes||Yes||Yes|
|Item Dimensions||1 x 3.75 x 4.75 in||5 x 1.5 x 3 in||5.37 x 1.12 x 3.37 in||10 x 12 x 3 in||10 x 2 x 9 in||—|
Top customer reviews
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We are very pleased with our new thermostats. They were very easy to install; it took about twenty minutes to hook each one up. The digital display is easy to read, although it doesn’t have a back-light for viewing in hours of darkness. Programming the thermostat was a reasonably straightforward and painless procedure.
These Honeywell RTH221B1021/A thermostats seem to do a much better job of regulating the heat in our house than the ones they replaced. It is too early to tell if we will see any savings on our heating oil budget. I would bet, however, that we will.
There are certainly more advanced and sophisticated thermostats on the market, but they cost a lot more. For our needs, these simple and inexpensive Honeywell RTH221B1021/A thermostats are perfect. Highly recommended.
Installation says "15 minutes or under" and I found this to be true.
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 thermostat, thread wires through hole and place against wall
Attach backing plate using screws and wall plugs provided
Put 2 x AAA batteries(NOT supplied)in the faceplate
Attach previously marked wired to the matching terminals at the back of the faceplate
Snap faceplate onto backing plate
Read instructions for setting time and programs
Turn power to furnace back on
Pros: cheap, easy to install, good instructions
Cons: would have been nice to include 2 x AAA batteries
Overall a good buy. I fitted one as a test and then bought 3 more.
As other reviewers have noted, you can only program one day that's repeated each day of the week. Calling this a 7 day timer is a lie.
After a year, I don't like it. I really just need an on/off that I set a temperature for. I thought it would be nice to be able to program it as an option. Unfortunately one HAS to program it. It's not an option. It does have a temporary mode but at some point that resets to default. An example, I have a default of 68. I set a temporary of 64 for overnight. I'm not sure when it reset but when I woke up the heater was running at 68.
So, if you need set times and set temperatures for the whole week this will work but if your use varies you will do a lot of reprogramming.
I'll be buying a set the temp and turn on or off thermostat.
I purchased this one to replace a non-programmable version and it is performing as expected.
The only negative that I found with this model was the labeling of the terminals inside: the red wire label is shifted such that the unused terminal can be mistaken with the one intended for the red wire, especially since the correct one has a wire bridge to the adjacent terminal; two wires go into the red terminal: the red itself and the factory equipped bridge.
Other than the above, it is a good product and simple to use.
so if you do not need sat sun programing, get this at best price, a lot of returns due to honeywell mis-advertising. they should fire exec in charge of advertising.