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
  • Easy to read digital display
$1988 /each
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Frequently Bought Together

Product Overview

  • Simple programming for the entire week, up to 4 periods per day
  • Easy to read digital display
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.

Product Overview

  • Simple programming for the entire week, up to 4 periods per day
  • Easy to read digital display
Model #: RTH221B
Sku #: 805478
Internet #: 203539508

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.

Info & Guides

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Name 7-Day Programmable Thermostat 7-Day Manual or Programmable Thermostat 5-2 Day Programmable Thermostat with Backlight 5-1-1 Day Programmable Thermostat with Backlight
Brand Honeywell Lux Honeywell Honeywell
Ratings (148) (15) (419) (90)
Features Battery Operated,Low Battery Indicator Backlit Display,Battery Operated,Lockable Backlit Display,Battery Operated,Filter Monitor,Low Battery Indicator Backlit Display,Battery Operated,Filter Monitor,Low Battery Indicator
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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
Whites
Features
Battery Operated,Low Battery Indicator
Included
Thermostat
Periods per Programmable Day
4
Returnable
90-Day
Shape
Rectangle
Thermostat Product Type
Programmable Thermostat
Thermostat Type
Heating and Cooling
Voltage (volts)
24
Works With
24-Volt Heating & Aiir Conditioning System

Warranty / Certifications

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

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
Whites
Features
Battery Operated,Low Battery Indicator
Included
Thermostat
Periods per Programmable Day
4
Returnable
90-Day
Shape
Rectangle
Thermostat Product Type
Programmable Thermostat
Thermostat Type
Heating and Cooling
Voltage (volts)
24
Works With
24-Volt Heating & Aiir Conditioning System

Warranty / Certifications

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

Questions & Answers

Why can't this be used with baseboard heaters?

Asked by: MacG
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.
Answered by: EdwardS
Date published: 2017-02-14

furnace oil heating

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?
Asked by: David
Our forced hot water is fueled by natural gas and this works just great. Program it and forget it.
Answered by: toolgirl
Date published: 2015-11-08

Is it easy to install

Replace my old unit
Asked by: Myke
No, it disintegrated into pieces in my husbands hands. Almost got stuck with NO A/C in the middle of July!
Answered by: Dino
Date published: 2017-07-27

purpose of battery

Is the battery actually used for back-up or just used for background lighting?
Asked by: Butch
Back up for power outages to keep your settings.
Answered by: Jeremy
Date published: 2017-03-28
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Customer Reviews

7-Day Programmable Thermostat is rated 3.6 out of 5 by 148.
Rated 5 out of 5 by from Installed in a matter of minutes. Instructions were easy to follow, and the job quite simple with... Installed in a matter of minutes. Instructions were easy to follow, and the job quite simple with the labels they provided for the wiring. My other thermostat had stopped working completely (and in the deep south this time of year, that's a major issue) - and not only did this correct the problem, I've noticed my temperature inside is staying more constant - and the a/c is not cycling as often or long. I suspect this will end up saving me money in the long run.
Date published: 2017-08-08
Rated 5 out of 5 by from Great For the price it's the best on the market, easy to use and program. Would buy it again in fact I did cause my last house I put one in there and it worked great for years.
Date published: 2017-08-29
Rated 1 out of 5 by from It fell apart into a million pieces as my husband tried to install it. DO NOT BUY THIS ITEM!!! W... It fell apart into a million pieces as my husband tried to install it. DO NOT BUY THIS ITEM!!! We Would have been without any A/C that night if my husband hadn't gotten the old broken one back on immediately: Not worth risking a night without heat or air because this crumbled. I was going to return the "parts" but decided for the refund price, we are going to use it as a gag gift at our son's wedding rehearsal dinner.
Date published: 2017-07-27
Rated 4 out of 5 by from Works great I gave it 4 stars because it does what it's supposed to do. The instructions didn't include my particular ac unit so I had to go online to find out how to correctly install it. If it would have it'd gotten a 5 star rating.
Date published: 2017-07-04
Rated 5 out of 5 by from Easy to install and works as described! I installed this... Easy to install and works as described! I installed this myself and I’m a mom of two young kids. I love for them to see that women are just as handy as men.
Date published: 2017-10-07
Rated 4 out of 5 by from Works well but has no internal light for adjusting. The directions are somewhat opaque,I had to ... Works well but has no internal light for adjusting. The directions are somewhat opaque,I had to call them twice.
Date published: 2017-05-30
Rated 1 out of 5 by from Not worth $1 Failed after just about 1 year. Buy a different thermostat.
Date published: 2017-05-12
Rated 3 out of 5 by from 3 Star Review Rating provided by a verified purchaser
Date published: 2017-04-21
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