Honeywell Home RTH221B 24-Volt Basic schedule Programmable Thermostat
Item #894189 |
Model #RTH221B1039/E1
Set one program for the entire week with four program periods per day including wake, leave, arrive and sleep
Precise temperature control of +/- 1 degree Fahrenheit
Easy-to-read digital display with an intuitive interface for one-touch access to set point temperature
Easy to install yourself and basic operation keeps programming simple
Built-in battery change reminders
Compatible with: heating, cooling and heat pumps without auxiliary heat options
Does not work with electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling
The RTH20B is a replacement for the RTH221B, offering 5-2 day scheduling
General | |||
|---|---|---|---|
Series Name | RTH221B | Wiring Type | 2-wire |
Type | Thermostat | Heating Only | Yes |
Package Quantity | 1 | Cooling Only | Yes |
Shape | Rectangle | Temperature Displayed | Current room temperature |
Display Type | Digital | ||
Dimensions | |||
|---|---|---|---|
Depth (Inches) | 1 | Width (Inches) | 4.75 |
Height (Inches) | 3.5 | ||
Features | |||
|---|---|---|---|
Auto System Change from Heat to Cool | No | Multi-Stage Heating | No |
Backlit Display | No | Optional Battery-Free Operation | No |
Batteries Included | No | Program Periods per Day | 4 |
Built-In Z-Wave | No | Remote Control Included | No |
Daylight Savings Time Ready | No | Single-Stage Cooling | Yes |
Early-Start Comfort Function | No | Single-Stage Heating | Yes |
Filter Monitor | No | Temporary Vacation Override | No |
High/Low Desired Temperature Limits | No | Touch Screen Programming | No |
Hold Temperature Button | Yes | Voice Controlled | No |
Hub Required | No | Voltage (Volts) | 24 |
Multi-Stage Cooling | No | Program Settings | Basic schedule |
Compatibility | |||
|---|---|---|---|
App Compatibility | No | Works with Amazon Alexa | No |
Bluetooth Compatibility | No | Works with Android | No |
Compatible with Central Air Conditioning | Yes | Works with Apple HomeKit | No |
Compatible with Heat Pump (No Aux.) | Yes | Works with iOS | No |
Compatible with Heat Pump (No EM) | Yes | Works with SmartThings | No |
Compatible with Heat Pump (With Aux.) | No | Works with the Google Assistant | No |
Compatible with Heat Pump (With EM) | No | Use with Electric Baseboard 120V-240V | No |
Compatible with Hot Water | Yes | Use with Floor/Wall Furnace 24V or 750mV | Yes |
Compatible with Steam or Gravity | Yes | Use with Volt Gas Fireplace 24V or 750mV | Yes |
Compatible with Warm Air Furnace | Yes | Use with Pellet Stove for mV Thermostats | No |
Wi-Fi Compatibility | No | ||
Warranty | |||
|---|---|---|---|
Warranty | 1-year limited | ||
Certifications | |||
|---|---|---|---|
CA Residents: Prop 65 Warning(s) | No | Safety Listing | UL safety listing |
Miscellaneous | |||
|---|---|---|---|
UNSPSC | 41112200 | ||
Check out the Best Selling Programmable Thermostats on Lowes.com
Ratings may include incentivized customer reviews.
What Customers Are Saying
The product appears to have issues with programming and functionality, with many users reporting difficulties in setting temperature and schedules, as well as frequent malfunctions that fail to maintain the desired temperature. The design is also criticized as poorly thought-out. However, the summary focuses solely on the product's features, quality, and usage, without any mention of customer service or other non-product-specific aspects.
Customer review summary generated by AI, including incentivized reviews.Works, but very hard to program.
As a thermostat, it works. That's about all I can say for programming is extremely difficult without a bright flashlight, making the text visible.
Verified Purchaser
won't shut off at proper temperature
Set thermostat at 73 degrees. Temp go to 74 degrees. Air conditioning turns on. Temp hits 73 degrees but air conditioner stays on until the temp reaches 72 degrees. The heat part of the thermostat works the same way!
From resideo.com
Hi, thank you for bringing this to our attention. We will be happy to help troubleshooting to verify if this is a thermostat or HVAC system issue. At ...
Needs background light
I’ve had this thermostat for about a year now. I original had a nest thermostat and while I really liked it, it would not stay connected to my phone. I think I kept zapping it with static electricity and it would make the Wi-Fi part in it go out. So I just bought something simple. I’ve read a lot of the reviews and I have not had any of the issues others have had from what I remember setting it up a year ago it was fairly easy. my only issue with it is there’s no backup light and I can’t figure ...
From resideo.com
Worst
Very very confusing. I cannot turn On AC when i want. Such an irritating setup this system has. When I want to change the temperature the screen is locked and itdoesnt allowmw to change. Oneof the worst thermostats i have ever used
From resideo.com
Hi, we appreciate your feedback and would like the opportunity to help. Our Support Center link at the top of the page has all the ways you can get in...
It does not have a back light.
It was easy to install, and works well.
Verified Purchaser
Not easy to st up
Nice looking Very hard to figure out the dimplest form kf the wiring so i could get get to work. I can always get wlectronic things to work so i will return it
Verified Purchaser
Hi, we're sorry to hear you're experiencing this with installation. Please feel free to get in touch with us for support at 800-633-3991. ...
Sometimes, less is more
Excellent, works perfect & easy to install
Verified Purchaser
Lowe's resell faulty thermostat
It makes sense that this was marked down cuz many people probably brought it back and you sell it as a final sell and no one can return it so y'all still win and we still lose when we originally lost out when we needed a thermostat so here I've spent $29 on the thermostat just to have to turn back around and buy a new one that actually works. This thermostat the first day that I put it on was at 90° when I put it to 70 when I try to put it down it only stays up in the 80s every time I put on thi...
Difficult to Navigate
Had to look up YouTube videos to make a temp stay that temp until you change it. Woke up and the heat was off and nothing was set after i set it 2 days before that. Spend a little bit more money and get one that is non programmable and just has arrows and set button
Hi Kyndall, thank you for taking the time to rate the Honeywell Home Basic Schedule Programmable Thermostat. We appreciate the feedback and will util...
10 Questions
2
Answers
1
Answer
1
Answer
1
Answer
1
Answer
1
Answer
1
Answer
1
Answer
How do you reset the program for the week setting
Deel on January 8, 20220
Answers
How do you set this thermostat it’s always cold in winter time
Angie on November 23, 20210
Answers
Hi JohnB, thank you for your review of the 24-Volt Basic schedule Programmable Thermostat. We highly appreciate your feedback and take your comments ...