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Internet #203539508

Model #RTH221B

Store SKU #805478

1-Week Programmable Thermostat with Digital Display

  • Simple programming for the entire week, up to 4 periods per day
  • Basic and easily operable programming
  • Easy to read digital display
  • See More Details

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Product Overview

The Honeywell Home 1-Week Programmable Thermostat has a simple interface and offers one basic program for the entire week with 4 program periods. It automatically adjusts the heating or cooling of your home so you are comfortable when you wake up, come home or at any other time you prefer.

Info & Guides

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1-Week Programmable Thermostat with Digital Display
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Brand Honeywell HomeLux
Name1-Week Programmable Thermostat with Digital Display5-2 Day Programmable Thermostat with Digital Backlit Display5-1-1 Day Programmable Thermostat with Digital Backlit Display5-2 Day Universal Application Programmable Thermostat
Price
Ratings
(413)
(1819)
(506)
(59)
FeaturesBattery,Low Battery IndicatorAuto Changeover,Backlit Display,Daylight Savings Time ReadyAuto Changeover,Backlit DisplayRemovable Interface
Thermostat CompatibilityUniversalUniversalUniversalUniversal
Wire Configuration4-Wire4-Wire4-Wire4-Wire
Control TypeManualManualManualManual
Heating & Cooling System TypeSingle Stage2 StageSingle StageSingle Stage
Power OptionsHardwiredHardwiredHardwiredBattery Operated
Thermostat ShapeRectangularRectangularRectangularRectangular
Voltage TypeLow VoltageLow VoltageLow VoltageLow Voltage
IncludedMounting HardwareMounting HardwareMounting HardwareMounting Hardware
View ProductView ProductView ProductView Product

Specifications

Dimensions

Display height (in.)
1 in
Display width (in.)
1.75 in
Product Depth (in.)
1
Product Height (in.)
3.5
Product Width (in.)
4.75

Details

Battery Power Type
Alkaline
Battery Size
AAA
Color Family
White
Control Type
Manual
Features
Battery,Low Battery Indicator
Heating & Cooling System Type
Single Stage
Included
Mounting Hardware
Pack Size
1
Periods per Programmable Day
4
Power Options
Hardwired
Returnable
90-Day
Shape
Rectangle
Thermostat Compatibility
Universal
Thermostat Product Type
Programmable Thermostat
Thermostat Shape
Rectangular
Thermostat Type
Heating and Cooling
Voltage (v)
24v
Voltage (volts)
24
Voltage Type
Low Voltage
Wire Configuration
4-Wire

Warranty / Certifications

Certifications and Listings
No Certifications or Listings
Manufacturer Warranty
1 year limited warranty

Questions & Answers

68Questions26Answers

Will this install in a camper 2007

Asked by Jenny March 27, 2021
3
Answers

If your system is looking for a 24V input from a thermostat to turn on, then the Honeywell Home 1-Week Programmable Thermostat may work. We recommend you contact the original manufacturer of the system to confirm, or to see if they have any recommendations for an appropriate replacement. - Jerry

I bought a RTHL221B. The pictures and description show it being backlight but it is not. Is this model backlight?

Asked by Tim February 25, 2021
2
Answers

The 7 day is not back lighted The 5-2 day is back lighted.

What is the difference between this model and RTHL221B ?

Asked by Tim February 25, 2021
2
Answers

$17. Imagine the kiss principle applied to thermostats, and that’s what you get with our 1-Week Programmable Thermostat. It offers basic operation in a sleek one-piece design. You can set a program for the entire week with up to 4 periods per day, accounting for sleep, wake, leave and return. Features like display options for temperature and time, as well as precision comfort control, add to the thermostats simplicity and comfort. AND $44. Bring easy, convenient climate control into your home with the Honeywell 7-Day Programmable Thermostat with Backlight. An extra-large, user friendly display has a backlight for easy use both day and night. The precise temperature control lets you keep your house at the perfect temperature when you are home and away. Program for the weekdays and weekends with 4 program periods per day Easy to use, basic operation keeps programming easy Precise +/- 1 degree F temperature control Backlit display for easy viewing even in dimly lit rooms or hallways Filter change reminder

Does this have the heat pump on it

Asked by Peggy February 8, 2021
2
Answers

Sorry,I don’t have a heat pump. I doubt it. Better ask the manufacturer.

What is the difference between 2 stage thermostat and a 1 stage thermostat?

Asked by besttec January 28, 2021
3
Answers

Hi besttec, 1 stage thermostat will only work with one W and one Y wires, they are not compatible with auxiliary or emergency heat. multi stage thermostats will work with more than one W or Y wires. If you need assistance verifying compatibility you can contact our tech support team at 1-800-468-1502 Monday - Friday 9 am to 8 pm, Saturday - Sunday 9 am to 5 pm CST.

Can I use this for heating only

Asked by Jimmy January 25, 2021
3
Answers

Yes.

We just brought this in Home-depot ... We fund this one did not has any week day ( Mon, Tue...) s...

Asked by Sure123 January 4, 2021
4
Answers

You set it for the times you want it and the temperature and it good for the week.

Will it work with a pellet stove

Asked by Jeeper November 8, 2020
2
Answers

If your stove has 2 wires and 24V this model will work.

Is a Genisys model 7505B Advanced Burner control and an AquaSmart 7600 Boiler control compatible ...

Asked by Philly November 8, 2020
2
Answers

This model should do the trick as both of the provided models are 24Vac Thermostat compatible.

Does this unit require a C wire.

Asked by RalphZ October 15, 2020
3
Answers

I use it as a simple 2 wire heat only thermostat.

1-Week Programmable Thermostat with Digital Display - page 2

Customer Reviews

  • 3.7
    out of 413 reviews
  • 64% recommend this product
Filter by:
Showing 1-10 of 413 reviews
Nearly unreadable in hallway with modest lighting
Model I bought was RTH221B and had a gray screen not green as shown. Thermostat display was barely readable making it unsuitable for intended hallway location. The contrast in the actual display was not at all close to that shown on product box. Installation was straightforward with markings on unit and good directions in installation guide.
by Leo
Response from Resideo TeamMay 24, 2021
Hi Leo, we are sorry to hear about this. The RTH221B is not a backlit model, we will be happy to recommend you or help finding a different model at 1 (800) 468-1502 or through social media. - Maria resideo
Poor Quality Control
I've noticed that this model has varying quality controls: the one I bought previously lasted reliably for years, but the next iteration of the same model often says "Heat On" but fails to engage the boiler, and allows my heat differential to drop several degrees (right now it's 61F in my place, and it's supposed to be 70F). i'm in the middle of New England winter, and some days I wake up shivering and have to huddle in a room with a space heater till the thermostat decides to hail the boiler. Pretty miserable now that I'm at home 24/7 under quarantine. I'm an engineer; I understand sometimes you've got to troubleshoot a product. I've gone through almost every relevant internet resource to try and correct this issue, and I even paid to have a professional come over to look at the thermostat and boiler. I'm on my second replacement, which failed even sooner than the first one (first model started malfunctioning the week after the warrantee expired; Honeywell gave me a replacement, which started showing issues after the first month). Advice: I would look at the form factor of the device: if the text on the front says "Honeywell Home", it's one of the more reliable iterations of this model. If it just says "Honeywell", then good luck. Honeywell used to take pride in their brand, but now they just pass any of my complaints over to Resideo Technologies and wash their hands of the problem.
by Usgan
Straight forward install. Switched wires from the old non-programmable to this one and mounted to...
Straight forward install. Switched wires from the old non-programmable to this one and mounted to the wall and all went as expected.
by Yukoneric
Good product, works well. Will buy it again. Don't want all the bells and whistles other brands o...
Good product, works well. Will buy it again. Don't want all the bells and whistles other brands offer.
by BJRU12
The buttons are a little sticky at times, but otherwise...
The buttons are a little sticky at times, but otherwise it is working great
by Ph
This thermostat has no back light. At night you would have to provide a light just to see the rea...
This thermostat has no back light. At night you would have to provide a light just to see the reading when making adjustments
by Dre
10 people found this helpful
thermostat
the thermostat was Easy to install and easy to program plus very inexpensive
by coloradotex
4 people found this helpful
Once it is setup, it works very well!
It was a little difficult to assemble at first because the schematic and directions were different than what I have at my house, but after toying with it with a friend we were able to successfully get it connected and working. It works really well and I love the fact that I can set up different temperatures at different times, so I can keep my energy costs low.
by rt25ga
1 person found this helpful
This product is easy to use.
The installation manual was simple to read, making the set up a breeze. Program it once an your done.
by Suttle
2 people found this helpful
Great Value
The Honeywell programmable thermostat is by far the easiest to use. Many programmable thermostats have way to many bells and whistles that just in my opinion complicate your desire to use some simple features. I found the Honeywell use to connect, program and just let run. A great value for the money.
by Irishmansmiling
1 person found this helpful
Showing 1-10 of 413 reviews