Model # RTH221B

Internet #203539508

Store SKU #805478

Honeywell 7-Day Programmable Thermostat
0085267348553

Honeywell

7-Day Programmable Thermostat

  • Simple programming for the entire week, up to 4 periods per day
  • Compatible with heating, cooling & heat pump w/o auxiliary heat
  • Easy to read digital display
$21.87 /each

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Product Overview

The Honeywell 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. Used as directed, it offers energy savings of up to 33%.

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$20.74 /each
$21.87 /each
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Name 7-Day Manual or Programmable Thermostat 7-Day Programmable Thermostat 5-1-1 Day Programmable Thermostat with Backlight Premium 7 Day Programmable Universal Thermostat
Brand Lux Honeywell Honeywell Emerson
Ratings (7) (132) (67) (35)
Features Backlit Display,Battery Operated,Lockable Battery Operated,Low Battery Indicator Backlit Display,Battery Operated,Filter Monitor,Low Battery Indicator Backlit Display,Battery Operated,Low Battery Indicator
Thermostat Program Type 7 - Day 7 - Day 5 - 1 - 1 Day 7 - Day
Color Family Whites Whites Whites Whites
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Customer Questions & Answers

7-Day Programmable Thermostat
7-Day Programmable Thermostat

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This question is from 7-Day Programmable Thermostat
 
11 answers

Why can't this be used with baseboard heaters?

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Asked by
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January 9, 2014
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Asked by
Seattle, WA
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Home Improvement Profile: DIYer
January 19, 2016
Answer: 
WARNING!! IGNORE EVERONE WHO JUST BLITHELY SAYS "IT WORKS"! It's not that simple, and it could be very dangerous if you do the wrong thing. I have an EE degree, and HarryJ below got it right. You need a transformer to convert line voltage to 24V and a relay in order to use a low-voltage thermostat with baseboards. Furnaces have such devices built-in. Fortunately, you don't have to build your own. Such a Read More
WARNING!! IGNORE EVERONE WHO JUST BLITHELY SAYS "IT WORKS"! It's not that simple, and it could be very dangerous if you do the wrong thing. I have an EE degree, and HarryJ below got it right. You need a transformer to convert line voltage to 24V and a relay in order to use a low-voltage thermostat with baseboards. Furnaces have such devices built-in. Fortunately, you don't have to build your own. Such a device is commercially available. It's called something like a "Level Temp Silent Operator", and it mounts directly in a knockout in a junction box in which you bring the line from the service panel and the line to supply the baseboards. Look up 24A01G-3. Such a device is available on this website under "Thermostat Accessories". They are also available at just about any local electrical supply house. I have hydronic baseboards, and my previous operator just failed after 35 years of flawless service. Because it is likely that you will replace your thermostat a few times over the course of many years, I believe it is a significant safety feature to NOT have a line voltage line feeding the thermostat. Read Less
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Asked by
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January 9, 2015
Answer: 
This runs off 24 volts from a furnace or heat pump and baseboard heaters run off 120 to 240 volts
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Asked by
Manchester, NH
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January 2, 2015
Answer: 
We have hot water baseboard heaters and use this thermostat with no problem.
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Asked by
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December 10, 2014
Answer: 
you need a thermostat made for electric heat, this is low volt
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Asked by
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October 7, 2014
Answer: 
Baseboard heaters normally use line voltage (in other words 120 volts or 240 volts) all the way through the thermostat. Hot air and baseboard hot water systems use low voltage to control a relay that sits near the furnace. You could build a low voltage control with a transformer, a relay an electrical box - but it isn't the kind of thing that most people want to do. The advantage would be you can get Read More
Baseboard heaters normally use line voltage (in other words 120 volts or 240 volts) all the way through the thermostat. Hot air and baseboard hot water systems use low voltage to control a relay that sits near the furnace. You could build a low voltage control with a transformer, a relay an electrical box - but it isn't the kind of thing that most people want to do. The advantage would be you can get fancy programmable thermostats like this one - but there is some electrical knowledge needed and if not done right it can be dangerous.
For the vast majority of people buying the right thermostat for electric baseboard heat is the way to go. Read Less
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Asked by
Waterville, ME, USA
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April 14, 2014
Answer: 
It can you have to look on the back of it has a switch and for baseboard heaters it has to be on electronic not oil belive it or not but it does work I have it and have baseboard heating
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Asked by
Palm Springs, CA, USA
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March 4, 2014
Answer: 
uncertain
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Asked by
Post Falls, ID, USA
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Home Improvement Profile: Professional
January 24, 2014
Answer: 
This thermostat requires 24V to operate, we call this low voltage. Baseboard heaters are wired into 120V, this is what we call LINE VOLTAGE. So baseboards require thermostat that can handle 120 voltage.
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Asked by
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January 23, 2014
Answer: 
Yes this unit can be use with baseboard heaters I bough one for a customer ,but she said that this unit was to hard for her to change the settings It really isn't that hard to do but she was not satisfy , so she went back to the old round Honeywell. Well You can't win all the time Really it is a good unit and simple to set up. I recommend this unit specially for small homes and apartments.
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January 17, 2014
Answer: 
The Honeywell RTH221B is rated for low voltage. Most baseboard heating systems are line voltage.
To confirm what thermostat replacement options there are, please call the Honeywell Consumer Technical Support Line at 1-800-468-1502. When you call please have information on the make/model of your existing thermostat, the voltage it is rated for and designation for each terminal that has a wire attached to Read More
The Honeywell RTH221B is rated for low voltage. Most baseboard heating systems are line voltage.
To confirm what thermostat replacement options there are, please call the Honeywell Consumer Technical Support Line at 1-800-468-1502. When you call please have information on the make/model of your existing thermostat, the voltage it is rated for and designation for each terminal that has a wire attached to it.
Sincerely,
Honeywell Customer Care Read Less
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Asked by
Post Falls, ID, USA
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January 14, 2014
Answer: 
Baseboard heaters require to be wired in to direct line voltage, 120V.
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This question is from 7-Day Programmable Thermostat
 
7 answers

furnace oil heating

This question is from 7-Day Programmable Thermostat
Asked by
Manchester NH
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December 27, 2013
I have forced hot water heat only and burn oil and i am looking to save 20% on buying oil what ius the best progmable thermostate avaiable?
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Answers (7)

Asked by
Manchester, NH
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January 2, 2015
Answer: 
Our forced hot water is fueled by natural gas and this works just great. Program it and forget it.
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Asked by
PA
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December 11, 2014
Answer: 
YES THIS IS MADE FOR THAT SYSTEM
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Asked by
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October 7, 2014
Answer: 
It depends on your life style. If you have a fairly regular schedule (get up, go to work, come home, go to bed) and are home two continuous days then a simple 7 day thermostat will work. The inexpensive ones have two settings - weekdays and weekends. They have worked for me for years. If you have a more variable schedule you might need something that allows you to program each day separately. All of them Read More
It depends on your life style. If you have a fairly regular schedule (get up, go to work, come home, go to bed) and are home two continuous days then a simple 7 day thermostat will work. The inexpensive ones have two settings - weekdays and weekends. They have worked for me for years. If you have a more variable schedule you might need something that allows you to program each day separately. All of them have the ability to override the schedule in case you are off for a holiday or your plans change.
The ones that have more days are generally not worth the extra money in my experience as there seems to be a big jump in price. Mine have lasted for many years with only a battery change every 4-5 years.
As to whether you will save 20% on oil, there are a lot of variables - but turning down the thermostat when you are not home is a big help. Read Less
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Asked by
Waterville, ME, USA
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April 14, 2014
Answer: 
Honeywell is a great product I saved $100.00 2months ago simply by installing it I even upped my temp to 72 vs 68 that I had it to prior I highly recommended it along with home depot I got it for $20 well worth the money
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Asked by
Frisco, TX, USA
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January 26, 2014
Answer: 
To obtain the savings that you need make sure that you get more than a basic programmable thermostat. You will want to be more in control of your times and temperature settings including the weekends. I recommend that you go to www.homedepot.com and look at the various models available and compare them before making your purchase. If not comfortable with that, just visit a store and I am sure you will Read More
To obtain the savings that you need make sure that you get more than a basic programmable thermostat. You will want to be more in control of your times and temperature settings including the weekends. I recommend that you go to www.homedepot.com and look at the various models available and compare them before making your purchase. If not comfortable with that, just visit a store and I am sure you will walk out with the product that you need. And by the way, highest price does not always mean the best product. And no I do not work for Home Depot. Read Less
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Asked by
Post Falls, ID, USA
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January 14, 2014
Answer: 
I would use a lower end to a mid level programmable thermostat. The higher end thermostats have such a close temperature range of heat an cool, that may cost you more fuel usage than savings.there are more issues to consider than just a thermostat.
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December 28, 2013
Answer: 
The Honeywell RTH221B is rated for low voltage and can be used on a variety of heating and cooling systems.
One of the keys to helping save energy is the use of a programmable thermostat. With that in mind there may be number of possible options for your application.
To determine which thermostat(s) may be compatible on your system, and has the features you want, the following information would be Read More
The Honeywell RTH221B is rated for low voltage and can be used on a variety of heating and cooling systems.
One of the keys to helping save energy is the use of a programmable thermostat. With that in mind there may be number of possible options for your application.
To determine which thermostat(s) may be compatible on your system, and has the features you want, the following information would be needed:
- The make/model of your existing thermostat.
- The voltage it is rated for.
- The letter designation for each terminal on it that has a wire attached to it.
Once you have that information, please call the Honeywell Consumer Technical Support Line at 1-800-468-1502.
Sincerely,
Honeywell Customer Care Read Less
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This question is from 7-Day Programmable Thermostat
 
4 answers

Can this thermostat be used with a heat pump system?

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June 6, 2014
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Asked by
CT
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January 5, 2016
Answer: 
Yes but i would not if you are talking Geo-thermal heat pump. If you are talking air-based heat pump you are fine.
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Asked by
Camden, Arkansas
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August 18, 2015
Answer: 
Yes it works with my heat pump system. It is compatible with gas heat also. It has a manual switch for AC and can be left at that position, until you need heat, it won't automatically switch from AC to heat.
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Asked by
Crystal River, Fl
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December 10, 2014
Answer: 
Yes it can.
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June 10, 2014
Answer: 
The Honeywell RTH221B can be used with a 24 volt heat pump system that does not have an auxiliary backup.
If you have further questions, please contact the Honeywell Consumer Support Line at 1-800-468-1502.
Sincerely,
Honeywell Customer Care
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This question is from 7-Day Programmable Thermostat
 
3 answers

Can this be used for central air conditioning control only?

This question is from 7-Day Programmable Thermostat
Asked by
Iowa
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June 13, 2015
I have separate central air and heating is the boiler/radiator. I currently have two separate thermostats. Is there a thermostat that can be used to control both? Or should I keep separate controls? I need to at least replace the ac thermostat with a programmable one, and wonder if this thermostat would work for the ac alone.
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Asked by
Camden, Arkansas
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August 18, 2015
Answer: 
It will work for the AC alone. It has a manual switch to make it work for either gas heat, or AC. In your application, you can just leave it set on AC, and then program it to your daily preferences
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Asked by
Mineral, VA
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August 16, 2015
Answer: 
Honeywell has a toll-free number to call: 1-800-468-1502; you can ask them.
Meanwhile, educated wild guess: you have two entirely independent systems, and I'm guessing you turn one or the other on as needed.
*IF* the wiring is compatible (the installation manual is available here as a PDF), you can probably set this thermostat to COOL (or OFF when not needed), and run just the cooling system.
Again, Read More
Honeywell has a toll-free number to call: 1-800-468-1502; you can ask them.
Meanwhile, educated wild guess: you have two entirely independent systems, and I'm guessing you turn one or the other on as needed.
*IF* the wiring is compatible (the installation manual is available here as a PDF), you can probably set this thermostat to COOL (or OFF when not needed), and run just the cooling system.
Again, I'd check with Honeywell to be sure.
*PROBABLY* using one thermostat to control both heating and cooling systems would require some additional circuitry between the thermostat and each system to sort out which system is being called.
Again, I'd check with Honeywell. Read Less
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July 1, 2015
Answer: 
Thank you for your recent inquiry with The Home Depot. The Home Depot cannot advise any customer of how to use the product purchased or will be purchased. It is to the customer’s discretion of how they use the product. However, any injuries resulting in improper use of product are not the responsibility of the Home Depot. Please be sure to read the instruction manual that comes with your product. For any Read More
Thank you for your recent inquiry with The Home Depot. The Home Depot cannot advise any customer of how to use the product purchased or will be purchased. It is to the customer’s discretion of how they use the product. However, any injuries resulting in improper use of product are not the responsibility of the Home Depot. Please be sure to read the instruction manual that comes with your product. For any other questions, please call us at HomeDepot.com Customer Service 800-430-3376. Thank you for shopping Home Depot. Read Less
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Customer Reviews

7-Day Programmable Thermostat is rated 3.6 out of 5 by 132.
Rated 1 out of 5 by from My experience with this thermostat and customer service was, in a word, HORRIBLE. The thermostat ... My experience with this thermostat and customer service was, in a word, HORRIBLE. The thermostat would not work. I could turn it on, but it would not turn off. It did not respond to simple changes in settings and more than likely it is not programmed to accepted standard color coded wiring. I contacted customer service for help and after waiting about 15 minutes was connected. The rep immediately went down a path that blamed me for the reason the thermostat wouldn't work, even though I had the thermostat wired exactly like the one I was replacing. I finally gave up trying to reason with him when he told me I needed to contact a contractor. This was a dodge because he didn't want to acknowledge a defective thermostat or work with me on how to fix it. I reinstalled the old thermostat with no problems and will look for another digital thermostat....from a DIFFERENT company. Never again.
Date published: 2016-11-14
Rated 4 out of 5 by from It was easy to install, but you can not read the face dial if there is no light in the room It was easy to install, but you can not read the face dial if there is no light in the room
Date published: 2016-12-18
Rated 1 out of 5 by from Worked great for a little over a year. Now it calls for heat at random times. My wake time is s... Worked great for a little over a year. Now it calls for heat at random times. My wake time is set for 7.30 am and 67. I have been woken up all week between 3 and 6 am with the heat on. The thermostat says it is in the wake mode. UGH. It is also heating beyond the programmed temp. Currently my house is 73 but the thermostat is set to 67. I called Honeywell and since it is over a year old it is out of warranty and I need to buy a new one. If it matters I have used this with an oil fired boiler. And I have changed the batteries twice in the last 3 weeks hoping this would fix the issue. But it is a flaw in the thermostat.
Date published: 2017-01-13
Rated 5 out of 5 by from Easy to replace old unit, looks clean. 4 temperature settings/day, the same 4 settings each day, ... Easy to replace old unit, looks clean. 4 temperature settings/day, the same 4 settings each day, simple. My routine is simple & the same everyday, I just have to program 1 day rather than 7 days, or 5+1+1 etc. One thing I miss on the old thermostat, this thermostat only shows the temperature in the room, not what it is currently set at in the program.
Date published: 2017-01-04
Rated 1 out of 5 by from Very effective at maintaining a consistent 54-57 degrees, regardless of what you set it to. Unfor... Very effective at maintaining a consistent 54-57 degrees, regardless of what you set it to. Unfortunately, like many people I prefer a temperature in the low 70s. It's too cheap a product for it to be worth it to fight with customer service for a refund, but will be getting something more functional in the near future. And not from this manufacturer.
Date published: 2016-12-17
Rated 5 out of 5 by from Works and easy install - Replaced Nest Tried to move to a Nest thermostat, but unfortunately it didn't work properly on our 2 wire heating system. So instead of installing a C wire and going through all that expense, we just rolled back to a tried and true digital thermostat. Works great and was very easy to install.
Date published: 2016-11-08
Rated 5 out of 5 by from Took it to the house pluged it in worked great! I was repairing an existing unit because the read out was not working. I took the old unit with me to the store and it turns out this unit was an exact match to the one I was repairing. Took it to the house put the batteries in programed it and it work like a charm.
Date published: 2016-09-27
Rated 5 out of 5 by from Honey Well programmable thermostat We were having issues with our previous thermostat not making contact to keep our heat going. After installing this Honeywell Thermostat heat control is no longer a concern.
Date published: 2016-12-27
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