#1 Home Improvement Retailer

Internet #309440685

Model #RTHL221B1008/K1

1-Week Programmable Thermostat with Digital Backlit Display

  • Easily programmable for a week or 4 periods a day
  • Display options for easy temperature and time setting
  • Sleek 1-piece design enables easy operation
  • See More Details

Frequently Bought Together

+
+
Price:

Product Overview

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.
  • Simple programming (one program for entire week, plus four periods per day)
  • Easy to use
  • Display options (Celsius or Fahrenheit temperature 12- or 24-hours clock)
  • Sleek one-piece design

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar Programmable Thermostats

current product
1-Week Programmable Thermostat with Digital Backlit Display
1-Week Programmable Thermostat with Digital DisplayBest Seller5-2 Day Programmable Thermostat with Digital Backlit Display5-1-1 Day Programmable Thermostat with Digital Backlit Display
BrandHoneywell Home Honeywell Home
Name1-Week Programmable Thermostat with Digital Backlit Display1-Week Programmable Thermostat with Digital Display5-2 Day Programmable Thermostat with Digital Backlit Display5-1-1 Day Programmable Thermostat with Digital Backlit Display
Price
Ratings
(119)
(413)
(1819)
(506)
FeaturesNo Additional FeaturesBattery,Low Battery IndicatorAuto Changeover,Backlit Display,Daylight Savings Time ReadyAuto Changeover,Backlit Display
Thermostat CompatibilityUniversalUniversalUniversalUniversal
Wire Configuration4-Wire4-Wire4-Wire4-Wire
Control TypeManualManualManualManual
Heating & Cooling System Type2 StageSingle Stage2 StageSingle Stage
Power OptionsHardwiredHardwiredHardwiredHardwired
Thermostat ShapeRectangularRectangularRectangularRectangular
Voltage TypeMillivolt 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.)
1.125
Product Height (in.)
3.375 in
Product Width (in.)
4.75 in

Details

Battery Power Type
Alkaline
Battery Size
AAA
Color Family
Off-White
Control Type
Manual
Features
No Additional Features
Heating & Cooling System Type
2 Stage
Included
Mounting Hardware
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
Millivolt Voltage
Wire Configuration
4-Wire

Warranty / Certifications

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

Questions & Answers

49Questions16Answers

Can i use this thermostat in a camper to replace original camper thermostat

Asked by Bionic1 March 22, 2021
1
Answer

Hi there, 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

common wire

Asked by Chris February 22, 2021
2
Answers

No. Doesn’t need it

We have never programmed our thermostat,but our window has the word leave there, I don't know wha...

Asked by Gloria January 28, 2021
2
Answers

Hi there, it sounds like the thermostat may be in the leave schedule period. We would like to gather some more information on this to further assist. Please call our support line at 1-855-733-5465. We look forward to hearing from you soon. -Jay

where can I get the programing instructions . We were not given these when we bought our house?

Asked by sandy January 10, 2021
4
Answers

On this Home Depot page for this product, scroll down a little and look for "Info & Guides" to the right next to "Product Overview," click on "Instructions / Assembly"

Follow up info needed on a 2 wire seasonal use heat/boiler on or off..

Asked by BrYAn January 5, 2021
2
Answers

I hear ya, same sitch here. So I looked @ the controller on the furnace and reverse engineered it. You can pretty much use the printed mis directions for pandemic t.p.

Hello, will this unit retain programming when the batteries are removed for replacement?

Asked by DJU4ic January 5, 2021
1
Answer

Hi there, the settings are stored in non-volatile (permanent) memory. Only the clock and the day must be set after you replace the batteries. We hope this helps.

I have heat only and a 2 wire tstat now. will there be any issues if I use this new one

Asked by bill January 1, 2021
1
Answer

Hi Bill, the Honeywell Wi-Fi Smart Color Silver Thermostat does work with a two-wire application; however, the compatibility is based on the type of HVAC system you have not the number of wires. When you have a moment, please contact us at 1-855-733-5465, or through live chat at https://www.resideo.com/us/en/support for further assistance. You can also reach us through Twitter or Facebook under Honeywell Home.

Why falsely advertise "Digital Backlit Display" when the display does not light up? Another wast...

Asked by Grouchbag December 27, 2020
1
Answer

Hi there, we always hope that customers are satisfied with our products so it's disappointing that this wasn't the case for you. Please know that we value your business and would welcome the opportunity to discuss this further. Feel free to contact us at 1-855-733-5465, or through live chat at https://www.resideo.com/us/en/support/. You can also reach us through Twitter or Facebook under Honeywell Home.

Will this thermostat work on a floor furnace

Asked by Khole December 15, 2020
1
Answer

Hi Khole, This model is compatible with the following system types. -Gas or oil furnace: Use this setting if you have a standard gas or oil furnace that is less than 90% efficient. -Electric furnace: Use this setting if you have any type of electric heating system. -Heat pump, hot water or high-efficiency furnace: Use this setting if you have a hot water system or a gas furnace of greater than 90% efficiency. -Gas/oil steam or gravity system: Use this setting if you have a steam or gravity heat system.

The light went out. How do I change the battery?

Asked by star December 7, 2020
1
Answer

You can access the batteries you will need to detach the faceplate, pull from the bottom of the unit and pull away from wall plate.

1-Week Programmable Thermostat with Digital Backlit Display - page 2

Customer Reviews

  • 4.1
    out of 119 reviews
  • 70% recommend this product
Filter by:
Showing 1-10 of 119 reviews
The description is wrong
It says in the description on The Home Depot website that this model has a backlit display, it does not. The instructions clearly state that the RTHL2310 does, and not the RTHL221. I am very disappointed in this since, I was expecting it to have a backlit display
by Samantha
A good thing at a good price is worth buying!
The temperature is very well controlled,it works great for me!
by jimmyM
2 people found this helpful
Works great, easy to install, exactly what I expected! Has been installed for several weeks and i...
Works great, easy to install, exactly what I expected! Has been installed for several weeks and it works well.
by Nasa1
3 people found this helpful
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Easy to install, easy to program, works well
Easy to install, easy to program, works well
by Rod
easy install, great price
easy install, great price
by FIXER
I installed the thermostat as instructed & the cooling worked...
I installed the thermostat as instructed & the cooling worked well when I turned on the heat the transformer on my heating unit burnt out costing me for parts with labor almost $250.00
by GARRY
Response from Resideo TeamApr 21, 2021
Hello Garry, thanks for taking the time you took to share your experience with us. We'll forward your comments with our team. Thermostats work with an specific voltage, we always recommend to verify the power and system compatibility. Please feel free to contact our support team for additional questions or concerns at 1-800-468-1502 . We'll be glad to help. resideo
Easy to install, good programming options....
Easy to install, good programming options.
by ItsAllGood
good product and easy to DIY...
good product and easy to DIY
by HomeDepotCustomer
Great value item Works great...
Great value item Works great
by ROGER
Showing 1-10 of 119 reviews