Model # RTH221B

Internet #100633100

Honeywell Basic Programmable Thermostat-DISCONTINUED

Discontinued Honeywell

Basic Programmable Thermostat-DISCONTINUED

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Product Overview

Honeywell's basic programmable thermostat keeps it simple. Simply set your program periods (wake, leave, return, sleep) and they will run at the same time every day.

  • Easy to install and use
  • Precise temperature control of +/-1 degree of your setpoint to ensure maximium comfort
  • Sleek one piece design
  • Soft touch buttons
  • For use with heating and cooling systems
  • Does not work with electric baseboard heat (120-240 V) heat pump systems with backup heat or multi-stage heating/cooling

Info & Guides

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Name 7-Day Programmable Thermostat Basic Programmable Thermostat-DISCONTINUED 5-2 Day Programmable Thermostat with Backlight 5-1-1 Day Programmable Thermostat with Backlight
Brand Honeywell Honeywell Honeywell Honeywell
Ratings (145) (21) (384) (80)
Features Battery Operated,Low Battery Indicator Battery Operated,Low Battery Indicator Backlit Display,Battery Operated,Filter Monitor,Low Battery Indicator Backlit Display,Battery Operated,Filter Monitor,Low Battery Indicator
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Display height (in.)
Display width (in.)
Product Depth (in.)
Product Height (in.)
Product Width (in.)


Battery Size
Color Family
Battery Operated,Low Battery Indicator
Periods per Programmable Day
Thermostat Product Type
Programmable Thermostat
Thermostat Type
Heating and Cooling
Voltage (volts)
Works With
24-Volt Heating & Aiir Conditioning System

Warranty / Certifications

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

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Customer Questions & Answers

does this thermostat have a manual override?

Honeywell Basic Programmable Thermostat
Asked by: Anonymous
Yes, you can manually set the temperature, then press the hold button to hold it on whatever temperature you want at the time. If you don't press the hold button, then it will go back to its programmed setpoints automatically after I think 30 minutes or so. I'm sure the newer model is outstanding compared to this one.
Answered by: FloridaGator
Date published: 2015-11-04
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Customer Reviews

Basic Programmable Thermostat-DISCONTINUED is rated 4.7 out of 5 by 21.
Rated 4 out of 5 by from Quick Fix for Old Mercury Thermostat Installation - 4/5 - Incredibly easy. The wiring bracket is a really thin plastic that could break easy if too much pressure were to be applied. The directions were very clear and easy to follow. The wall mount is great; the thermostat sits off the wall only about an inch. Programming - 4/5 - Incredibly easy. Basically there are four time slots during the day that can be programmed. The time slots are predefined by default, but you have complete control over the time slots and the running temperature during said time slot. This model does not show the programmed temperature on the main display, only the current ambient temperature which may cause some unnecessary adjustments. Overall - 4/5 - This is a great upgrade from an old mercury based or broken thermostat. The programming options are sure to improve your electric bill from the moment installation is complete.
Date published: 2009-10-27
Rated 5 out of 5 by from Great, straightforward thermostat! This was my first time to install a replacement thermostat. The installation was easy (just as the box says 15 mins or less), and the instructions are clear. This unit looks and works a lot better than the old thermostat. It looks like a nice upgrade in my apartment. BTW the thermostat I received exactly matches the photo online.
Date published: 2012-05-03
Rated 5 out of 5 by from great value... no brainer For $20 this is a no-brainer if you simply are upgrading from your old-school thermostat. Installation - easy Programming - easy Batteries - swap like every six months Savings - we have a small house and have noticed a noteworthy savings in less than a year. Con - My friends and I have all noticed that at 4AM, the furnace cooks us - if you look at the thermostat it says 74! We turn it down to 68 at 11PM and up to 72 at 4:30AM. It might be that the bedroom doors are closed??? Somehow it over heats the house during that time period. We are upgrading to the 7 day programmable - we want to be spoiled!
Date published: 2010-02-14
Rated 5 out of 5 by from simple and inexpensive If you want a non programable thermostat then this is the one to get. Simple controls. Simple installation. Inexpensive. Two AAA batteries required (not provided).
Date published: 2012-10-20
Rated 5 out of 5 by from Honeywell Basic Programmable Thermostat RTH221B We have used this thermostat for about a year now and we love it! It is very accurate with the temperature settings, easy to program and a wonderful value. Also, there is no long heater-element delay in getting it to work--it starts up very quickly--a real blessing if you have to change the battery at 3:00 a.m.!!! I highly recommend this thermostat!
Date published: 2009-07-13
Rated 4 out of 5 by from Simple and effective Extremely good price for this product although not as detailed as the 5-2, 5-1-1 thermostats; it is a quick fix and easy to mount to the controls. LED display is efficient and controls are easy to use. Temperatures are always +/- 1degree farenheit of what you program it before the central air activates to adjust the temperature.
Date published: 2009-06-22
Rated 5 out of 5 by from energy saver very good product, very user friendly anybody can do it. Its great you dont have to worry about turning it off at certain times because it will take care of all that for you...just program once and your done.
Date published: 2010-10-06
Rated 5 out of 5 by from I have had this item now 4 weeks it was easy to install,less than 10 Min's .It easy to program and I love the fact it is easy to set a hold temp when I leave and easy to set right back .You will love this thermostat.
Date published: 2010-12-11
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