Internet #100476730

Model # CT87K

Store SKU #376234

0085267263672

Round Mechanical Thermostat Heat Only

  • "The Round" thermostat is the world's most popular thermostat
  • Mercury free thermostat
  • Precise temperature control for heat only systems
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Frequently Bought Together

Frequently Bought Together

Product Overview

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

Product Overview

  • "The Round" thermostat is the world's most popular thermostat
  • Mercury free thermostat
  • Precise temperature control for heat only systems
Model #: CT87K
Sku #: 376234
Internet #: 100476730

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.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Key Features

Product Overview
Key Features
  • "The Round" thermostat is the world's most popular thermostat
  • Mercury free thermostat
  • Precise temperature control for heat only systems
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.

Product Overview

  • "The Round" thermostat is the world's most popular thermostat
  • Mercury free thermostat
  • Precise temperature control for heat only systems
Model #: CT87K
Sku #: 376234
Internet #: 100476730

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.

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Compare Similar

Compare Similar Products
Brand Honeywell Honeywell Honeywell
Name Economy Heat/Cool Manual Thermostat Manual Electric Baseboard Thermostat Digital Non-Programmable Thermostat Round Mechanical Thermostat Heat Only
Price
$19.47
$21.98
$24.97
Ratings (180) (170) (637) (358)
Operation Type Mechanical Mechanical Digital Mechanical
Features No Additional Features Battery Operated,Low Battery Indicator No Additional Features
Thermostat Type Heating and Cooling Heat Only Heating and Cooling Heat Only
View Product View Product View Product View Product

Specifications

Dimensions

Display height (in.)
3.68
Display width (in.)
3.68
Product Depth (in.)
1.5
Product Height (in.)
3
Product Width (in.)
3

Details

Color Family
White
Control Type
Manual
Features
No Additional Features
Heating & Cooling System Type
Single Stage
Included
Mounting Hardware
Operation Type
Mechanical
Power Options
Hardwired
Returnable
90-Day
Shape
Circular
Thermostat Compatibility
Universal
Thermostat Product Type
Non-Programmable Thermostat
Thermostat Shape
Round
Thermostat Type
Heat Only
Voltage (v)
24v
Voltage (volts)
24
Voltage Type
Low Voltage
Wattage (watts)
24
Wire Configuration
2-Wire

Warranty / Certifications

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

Specifications

Dimensions

Display height (in.)
3.68
Display width (in.)
3.68
Product Depth (in.)
1.5
Product Height (in.)
3
Product Width (in.)
3

Details

Color Family
White
Control Type
Manual
Features
No Additional Features
Heating & Cooling System Type
Single Stage
Included
Mounting Hardware
Operation Type
Mechanical
Power Options
Hardwired
Returnable
90-Day
Shape
Circular
Thermostat Compatibility
Universal
Thermostat Product Type
Non-Programmable Thermostat
Thermostat Shape
Round
Thermostat Type
Heat Only
Voltage (v)
24v
Voltage (volts)
24
Voltage Type
Low Voltage
Wattage (watts)
24
Wire Configuration
2-Wire

Warranty / Certifications

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

Questions & Answers

Does this have a removable or rechargable cbattery?

Asked by: HdweVice
No this is a manual heat only thermostat. It is applicable for 2 wire installations, however it is possible to get a faulty unit. I got a bad unit that would not allow the heat to shut off. I replaced the thermostat with another of this model and everything was fine. Very simple installation
Answered by: NJTeddy
Date published: 2019-01-21

Is this thermostat able to be used with natural gas?

Is this thermostat able to be used with natural gas?
Asked by: Tam
I am using the thermostat with 2 wire system to control a furnace fed by natural gas.
Answered by: NJTeddy
Date published: 2019-01-06

CAN THIS THERMOSTAT BE SET FOR 80 DEGREES OR HIGHER??

CAN THIS THERMOSTAT BE SET FOR 80 DEGREES OR HIGHER??
Asked by: bob
YES. IT WILL SET UP TO 85 DEGREE'S. ITS VERY ACCURATE. EASY TO USE.
Answered by: chuckman
Date published: 2018-11-22

i have oil heat does this work on it

i have oil heat does this work on it
Asked by: Dee
It can work on most heating systems but what you have to understand is that the thermostat is just a switch that turns on automatically when the temperature goes below the setting that you have set on the thermostat. The important thing to realize is that the thermostat is rated for 24 volts or less so the voltage of what you are controlling and compatible wiring must be 24 volts or less. I hope this helps.
Answered by: Handy1
Date published: 2018-11-05
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Customer Reviews

Honeywell Round Mechanical Thermostat Heat Only is rated 3.7 out of 5 by 358.
Rated 1 out of 5 by from Honeywell thermostat I have a two zone forced hot water system for my home and replaced the old mercury style thermostats with these new ones. The old ones worked quite well but I wanted to change them to a white color to coordinate better with the newly painted walls. The only thing I can say about these thermostats are that they are easy to install. I installed one and discovered that there was a twelve degree discrepancy in the setting and actual temperatures. I called Honeywell and they concluded I must have installed it with the wrong settings. After discussing it with Honeywell he decided that I had installed it correctly but it was a defective unit. Home Depot replaced it without incident. By this time the rest of my home was repainted and I installed both thermostats. Neither temperature settings are accurate. One registers a ten degree difference and the other a six degree difference. These products are junk! I am currently looking at other thermostats and reading customer reviews before I purchase.
Date published: 2015-11-13
Rated 1 out of 5 by from Bought this product today to replace a 30 year-old thermostat that died. Installed according to ... Bought this product today to replace a 30 year-old thermostat that died. Installed according to instructions, and thermostat does not work! Heat turns on when wires are touched together, but not when installed in thermostat. I even tried hooking up the wires backward with no result, and in the third, "Y", station heat turned on, but wouldn't turn off. Tried wires back in correct position and it still didn't turn heat on. Apparently I can't return this item to Home Depot. Called customer service at 7 p.m. when unit didn't work. Customer service was closed. Will see what customer service tells me tomorrow when they are open for business again. I hope we won't have to do without heat (except "hot wiring" the heater) for weeks. Will update after speaking with Honeywell. Calling got me NOWHERE! I sat on the line for 45 minutes with a recording telling me every two minutes that I was the 15th in line. I gave up when a friend got my OLD thermostat working again. Taking product back to the store TODAY.
Date published: 2017-09-20
Rated 4 out of 5 by from Well, it works! The question is how long will it... Well, it works! The question is how long will it last. So ask me again in about ten years ( I will be dead) and I will let you know if it’s any good.
Date published: 2019-10-01
Rated 5 out of 5 by from very nice put this in my ouhter house for my folks,this is what they grew up with,easy to use and... very nice put this in my ouhter house for my folks,this is what they grew up with,easy to use and see.two wire hook up new mounting screws all done.easy and looks nice white.
Date published: 2019-09-10
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-10-09
Rated 4 out of 5 by from It’s good ... It’s good
Date published: 2019-08-28
Rated 1 out of 5 by from Not really functional I just wanted a simple, round thermostat for my hydronic heating system. It was easy to install - I have just a two wire system - and it looks fine. When it came time to call for heat, it would turn on correctly. The problem was it would never turn off. There are dip switches which allow you to set the type of system you have, presumably to preemptively turn on, and how much over the set point it will go before it turns off. However, no setting (after trying the applicable one) worked to shut the system down. For instance the set point was 68. When I came home from work (24 hours later) the thermostat said the temperature was 81... So the heat was working, the thermometer part was correct, but it just never shut off. It was cheap, so that was good. But you get what you pay for I guess. A friend of mine had an unused digital stat lying around - threw that in and its working like a charm.
Date published: 2015-12-08
Rated 1 out of 5 by from Inaccurate - Poor Quality Control Bought this unit (multiple) to replace the same unit which stop working at three years. (All replacing the classic mercury switch model which was in service for 30 years plus.) Buy first unit from Home Depot was 12 degrees off. Set to 70 degrees gave 58 degrees heat. (Return first unit without issue.) Buy second unit from Home Depot, this was 6 degrees off. Set to 70 degrees gave 64 degrees heat. (Hold on to this unit for the time being so I have something => it 20 degrees at night here now. Thinking Home Depot has a bad batch.) Buy third unit from a local plumbing supply house, same unit without consumer packaging, just a cardboard box. This unit is 6 degrees off. Ok so now two units with matching results. Maybe it is the system? Call in a technician to look at the system, this cost $150 and he finds no issues! Three separate trips to buy these thermostats from two different suppliers and ALL three units are grossly inaccurate. All I can say is good luck finding a unit that is remotely accurate. I would not recommend this product. No doubt this review will be followed by five or six calling it "a classic" and "nestalgic". Good luck with that.
Date published: 2016-01-07
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