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Honeywell Home RTH221B 1-Week Programmable Thermostat Front_Angled_Left
Honeywell Home RTH221B 1-Week Programmable Thermostat Front_Flat
Honeywell Home RTH221B 1-Week Programmable Thermostat Back_Flat
Honeywell Home RTH221B 1-Week Programmable Thermostat Front_Flat
Honeywell Home RTH221B 1-Week Programmable Thermostat Front_Flat
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Honeywell Home

Honeywell Home RTH221B 1-Week Programmable Thermostat

#052-2529-8
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Quebec residents: For information on maintenance and repair click here.

Honeywell Home

Honeywell Home

Honeywell Home RTH221B 1-Week Programmable Thermostat

$34.99

Product Details

The Honeywell Home RTH221B 1-Week Programmable Thermostat provides a single program for the entire week, with four distinct periods each day. Its precise temperature control allows adjustments within +/- 0.5 degrees Celsius. Featuring a clear digital display and user-friendly programming, this thermostat includes easy, step-by-step instructions for straightforward DIY installation. It is compatible with heating, cooling, and heat pump systems without auxiliary heat options, making it a versatile choice for any home.

  • Easy to use, basic operation makes programming easy

  • Power options: corded electric and battery-powered

  • Includes thermostat, user guide, and mounting hardware for easy setup

  • White colour complements most home interiors

  • Does NOT work with electric baseboard heat (120-240 V), heat pumps with backup, or multi-stage heating/cooling systems

  • Features low battery indicator and clock display for added convenience

  • Voltage: 240V

Part Number RTH221B1052
Colour White
Shape Rectangle
Display Type Digital
User Interface Buttons
Number of Batteries Required 0
Power Source Battery Operated
Smart System Compatibility No Smart Technology
Programmable Programmable
Automatic/Manual Reset Manual
Operation Modes Cooling, Heating
Stage Single Stage Heating
Accessories List Mounting Hardware
Advanced Features 24V Compatible, Battery Backup, Fixed Temperature
Maximum Operating Temperature (°C) 50.00 °C
Product Use(s) Central Air Conditioning, Cooling, Furnace, Gas Fireplace, Gravity, Heat Pump, Heating, Hot Water, Steam
Daily Program Periods 4
Operating Environment Indoor
Battery Type/Battery Size AA
Weekly Program Periods 7 Day
Certifications No Certifications
Assembled Height (in) 3.50 in
Assembled Length (in) 4.8 in
Assembled Width (in) 1.00 in
Assembled Weight (lb) 0.40 lb
Accessories List Mounting Hardware
Advanced Features 24V Compatible, Battery Backup, Fixed Temperature
Assembled Height (cm) 8.89 cm
Assembled Height (ft) 0.29 ft
Assembled Height (in) 3.50 in
Assembled Length (cm) 12.07 cm
Assembled Length (ft) 0.40 ft
Assembled Length (in) 4.8 in
Assembled Weight (kg) 0.18 kg
Assembled Weight (lb) 0.40 lb
Assembled Width (cm) 2.54 cm
Assembled Width (in) 1.00 in
Assembled Width (mm) 25.40 mm
Automatic/Manual Reset Manual
Battery Type/Battery Size AA
Certifications No Certifications
Colour White
Daily Program Periods 4
Display Type Digital
Maximum Operating Temperature (°C) 50.00 °C
Maximum Operating Temperature (°F) 122.00 °F
Number of Batteries Required 0
Operating Environment Indoor
Operation Modes Cooling, Heating
Package Depth (cm) 6.35 cm
Package Depth (in) 2.50 in
Package Height (cm) 20.16 cm
Package Height (in) 7.94 in
Package Weight (kg) 0.34 kg
Package Weight (lb) 0.75 lb
Package Width (cm) 16.19 cm
Package Width (in) 6.37 in
Power Source Battery Operated
Product Use(s) Central Air Conditioning, Cooling, Furnace, Gas Fireplace, Gravity, Heat Pump, Heating, Hot Water, Steam
Programmable Programmable
Shape Rectangle
Smart System Compatibility No Smart Technology
Stage Single Stage Heating
User Interface Buttons
Weekly Program Periods 7 Day
Warranty:
  • This product carries a 1 year exchange warranty redeemable at any Canadian Tire store.
Online Ordering
  • Pick Up is free at most stores (some stores require a minimum order value before tax)
  • Shipping fee is based on size and weight of products and distance from address to store
  • Same-Day Delivery costs $9.99 per order
  • Online Ordering Information
Returns
  • Most products can be returned or exchanged at any Canadian Tire store within 90 days of purchase
  • Some products are non-refundable and non-exchangeable
  • The return policy outlined above may not apply to the product you are currently viewing. For complete details and eligibility, please refer to our Return Policy for exceptions.

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Reviews

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41 reviews with 5 stars.
37 reviews with 4 stars.
11 reviews with 3 stars.
6 reviews with 2 stars.
29 reviews with 1 star.

Overall Rating

3.4
50 out of 77 (65%) reviewers recommend this product

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Customer Images and Videos

  • NOT "Easy To Use" like is says on the box. Should say, "Very Confusing To Use!"
  • Home thermostat
  • Review photo 3.
  • Review photo 4.

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1 to 5 of 124 Reviews.
1 – 5 of 124 Reviews

Good quality Good Price

6 months ago
Price is RIGHT. It is basic programmable It is simple installation.
Helpful?

Honeywell Home RTH221B 1-Week Programmable Thermostat

7 months ago
It's working exactly as expected.
Helpful?

Programmable thermostat

8 months ago
Great product this is to replace our old one which was the same product in it last for years easy to use
Helpful?

Not A Bad Unit

8 months ago
Easy to install but connecting the wiring was a pain. Wiring entry point is very close to the terminals in which the wires terminate. It required some wiring gymnastics but I eventually got them terminated.
Helpful?

Good thermostat with terrible instructions

9 months ago
This unit works well, but the instructions are almost useless. It is sold in Canada but the unit is set in degrees Fahrenheit and the instructions do not give any hint as to how to change to the Canadian standard Celsius/Centigrade. Also the instructions for installing in a previous two-wire set-up are not clear as to which wire goes where.
Helpful?
1 – 5 of 124 Reviews

Questions

1 - 10 of 33 Questions

Q: would this unit work with a 1993 carrier furnace / a/c ? have an old dial thermostat

5 years ago
2 Answers
  • A: Yes, the Honeywell Home Programmable Thermostat is designed to work with most heating and cooling systems; this includes fossil fuel or electric furnaces with a/c. -Jerry
    5 years ago
    Helpful?

Q: How do I turn on the back-light?

12 years ago
2 Answers
  • A: Purchased this item, could not get the back-light to work, called the Honeywell hotline, they told me this model does NOT come with a back-light, even though the manual seems to say that it does.
    10 years ago
    Helpful?

Q: Do this or other thernostat models havve an off setting

13 years ago
2 Answers
  • A: Yes it can been turned off
    13 years ago
    Helpful?

Q: Would this work with baseboard heaters connect through a 24v transformer? My new (old) home has baseboard heating. I have been converting my thermostats to digital, but one of my rooms is connected through a transformer to operate on a low voltage thermostat. Will this thermostat work for that set up?

13 years ago
2 Answers
  • A: The RTH221B1008 is a low voltage thermostat. It is rated for a minimum of 20Vac and a maximum of 30Vac. It is compatible with the following types of systems: Gas, oil or electric furnace — 2 or 3 wires Central air conditioner — 2 or 3 wires Hot water system (steam or gravity) with or without pump — 2 wires Millivolt system — 2 wires Central heating system with air conditioning — 4 or 5 wires Based on the description of your existing system and how the thermostat has been installed, it is quite likely the RTH221B1008 could be used as a compatible replacement thermostat. To verify that, as well as confirm how the RTH221B would actually be wired, we would recommend contacting our consumer technical support group at 1-800-468-1502. Please be prepared to provide information on the make and model of your existing thermostat, as well as the designation for each terminal that has a wire attached to it.
    13 years ago
    Helpful?

Q: How do I get this to display in celcius?

14 years ago
2 Answers
  • A: To enter the personal settings mode 1) Press the up and the down triangular buttons at the same time. 2) You will then see a 1 and then a smaller number beside it. because the thermostat is factory set to Fahrenheit the number will be 0 3) Press the up triangular button so that the 0 becomes a 1. 4) Press the up and the down triangular buttons at the same time again until you have excited out of the menu. Your display will now be in Celsius if all was done correctly.
    13 years ago
    Helpful?

Q: How do I Hook up the batteries on the new thermostat model RTH111B1042 from the old thermostat model YRLV3100A1019. Any advice will be helpful. Big John.

2 years ago
1 Answer
  • A: The new batteries are 2 aaa batteries that go on the back of the display. Which then snaps onto the plate on the wall
    2 years ago
    Helpful?

Q: What is the Honeywell Model number for this thermostat? Will it work on a millivolt system?

5 years ago
1 Answer
  • A: Hi Steve, this looks like the RTH221B thermostat and it is compatible with millivolt.
    5 years ago
    Helpful?

Q: Est-ce que la température est affichée en C° ou F° ou seulement en F° pour le modèle RTH221B1008?

6 years ago
Translate with Google
1 Answer
  • A: Tous les thermostats canadiens sont réglés au centigrade, mais peuvent être réglés à l'affichage en Fahrenheit, si on le préfère.
    6 years ago
    Helpful?
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Q: Does this thermostat require a battery

6 years ago
1 Answer
  • A: Yes, it takes two AAA alkaline batteries and it has a battery change reminder.
    6 years ago
    Helpful?

Q: is this thermostat compatible with CT60A1036? Ty

7 years ago
1 Answer
  • A: Assuming your customer already has the CT60A which is an electric heat thermostat, then I recommend the following programmable electric baseboard heat thermostat as a replacement: 0528890 HW 5/2 TSAT ELECBSBD - Honeywell 5-2 Electric Baseboard Thermostat RLV4300A1014 The other thermostat they asked about is not for electric heat, it is a 7 day programmable thermostat (low voltage.)
    6 years ago
    Helpful?
1 - 10 of 33 Questions