0085267263672

Honeywell

Model # CT87K

Internet # 100476730

Store SKU # 376234

Round Mechanical Thermostat Heat Only

$26.98 /each
  • "The Round" thermostat is the world's most popular thermostat
  • Mercury free thermostat
  • Precise temperature control for heat only systems

Frequently Bought Together

Product Overview

The Honeywell Round Mechanical Thermostat has dial-style mechanical operation in a traditional circular housing. It offers time-tested, precise temperature control in a simple, mercury-free thermostat.

  • Non-programmable
  • Familiar and easy-to-use dial
  • Precise temperature control
  • Suitable for home heating systems

Info & Guides

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Specifications

Dimensions

Product Depth (in.) 
1.5 
Product Height (in.) 
Product Width (in.) 

Details

Color Family 
Whites 
Control Type 
Dial 
Number of HVAC Zones 
Operation Type 
Mechanical 
Returnable 
90-Day 
Shape 
Circular 
Thermostat Type 
Heat Only 
Voltage (volts) 
24 

Warranty / Certifications

Certifications and Listings 
No Certifications or Listings 
ENERGY STAR Certified 
No 
Manufacturer Warranty 
1 year limited warranty 

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Customer Questions & Answers

28 Questions28 Answers

Customer Questions & Answers

Round Mechanical Thermostat Heat Only
Round Mechanical Thermostat Heat Only

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4 answers

will this work with a 2 wire system?

This question is from Round Mechanical Thermostat Heat Only
Asked by
Mongie
January 10, 2013
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Answers (4)

Asked by
Stratford, CT USA
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March 27, 2013
Answer: 
Yes
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Asked by
Buffalo, NY, USA
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February 26, 2013
Answer: 
Yes it will. No problem.
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January 22, 2013
Answer: 
The CT87K is compatible with the following two wire, low voltage systems: warm air, high efficiency warm air, hot water, steam, gravity and 2 wire normally closed zone valves. It is also compatible with Series 20 valves which have 3 wires and are powered open and closed.
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January 10, 2013
Answer: 
Hi Mongie,
This thermostat is designed for a two wire system and will work fine with your furnace. However if you have central air conditioning, you will need a different unit.
Mike, The Home Depot Answer Man
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3 answers

Will this work for a boiler system?

This question is from Round Mechanical Thermostat Heat Only
Asked by
Portage, MI
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May 19, 2016
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Answers (3)

June 8, 2016
Answer: 
Hi Macy, We would be happy to help you check compatibility. Please give us a call at 1-800-468-1502 - 8AM to 7PM CST from Monday to Friday. 8AM to 6PM CST on Saturday. And 9AM to 6PM CST on Sunday. Thank you.
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May 20, 2016
Answer: 
Yes, this will work for a boiler system.
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Asked by
Albuquerque, N. M.
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Home Improvement Profile: Professional
May 20, 2016
Answer: 
Yes, a thermostat is nothing but a switch that is operated via room temperature. So, it will operate your heating system boiler.
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2 answers

I have a 3 wire hot water system, with a normally open valve. Will this t-stat work for me?

This question is from Round Mechanical Thermostat Heat Only
Asked by
West bend, wi
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April 4, 2015
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Answers (2)

Asked by
Anonymous
Chicago, IL
Home Improvement Profile: Professional
June 28, 2016
Answer: 
Yes
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April 9, 2015
Answer: 
Dear Home Depot Valued Customer,
"The Honeywell CT87K will work for a Series 20 zone valve in a 3 wire configuration, but not a N.O. zone valve. The fact that you have 3 wires suggests you have a power open/power closed zone valve. If this is the case the CT87K will be fine. Honeywell Customer Care"
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2 answers

can I replace this with a programible thermostat

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Asked by
blanch,NC
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February 26, 2015
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Answers (2)

Asked by
Vernon, CT
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April 8, 2015
Answer: 
I didn't like the programmable thermostat I had so I replaced it with this manual model. I'm sure it could be converted back if someone wanted to.
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Asked by
Binghamton, NY
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Home Improvement Profile: DIYer
February 27, 2015
Answer: 
Yes, a programmable thermostat installs in the same manor and is an easy exchange. A programmable thermostat just allows you to automatically set the power on and off. In the off position you will not get heat.
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Customer Reviews

Rated 3.5 out of 5 by 74 reviewers.
Rated 5.0 out of 5.0 by Easy to install Easy , detailed instructions. This took only 15 minuets to install. :) June 28, 2016
Rated 5.0 out of 5.0 by great replacement for the old one. The new thermostat was a great replacement. Easy to install and works just fine. April 27, 2016
Rated 5.0 out of 5.0 by Great Item Very easy to install and works great. Hadn't ever done anything like this before but was so easy. April 26, 2016
Rated 1.0 out of 5.0 by worthless I bought 2 of these items they were both worthless badly calebrated April 12, 2016
Rated 5.0 out of 5.0 by best stat works great the best for your money simple to install easy to use. March 15, 2016
Rated 5.0 out of 5.0 by Great basic heat only thermostat Works very well, easily installed.and very accurate March 8, 2016
Rated 5.0 out of 5.0 by Great product! I had a programmable thermostat which was not an easy item to program. [My son-in-law would do it for me]. As a woman senior citizen I needed some thing that was simple to operate so I purchased a Honeywell Thermostat and installed it myself. It took about 10 minutes and, boom, done! Great product ... highly recommend. February 10, 2016
Rated 5.0 out of 5.0 by Great Purchase Very great product, affordable, last along time!!! February 23, 2016
  • 2016-07-27 T13:24:07.842-05:00
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