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Price: $41.95 $53.95
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  • Mercury free thermostat with simple worry-free operation.
  • Honeywell Classic Round design, world's most popular thermostat.
  • Precise temperature control for heat only systems.
  • Classic round styling.
  • Decorative wall cover ring included, hides wall marks from previous thermostat.
  • Compatible with heating only systems - forced air (gas, oil & electric), hot water & steam, heat pumps without backup.
  • NOT compatible with electric baseboard heat (120-240V), heat pumps with backup or multi-stage heating/cooling.

Round Heat Only Non-Programmable Thermostat

There is a reason why the Honeywell Round Heat Only Manual Thermostat is considered one of the most popular thermostats in the world. Installed in well over 70 million homes and buildings, the Round Heat Only Manual Thermostat is an easily accessible and reliable option to adjusting your surrounding's temperature. This non-programmable thermostat has been designed to be especially user friendly and features a simple and precise round design that's been celebrated for its ease of use and precision. Mercury free and featuring a decorative covering ring to conceal surrounding wall marks, the Round Heat Only Manual Thermostat is a modern classic that has earned its distinction as a top end thermostat. The CT87K Honeywell Thermostat is compatible with heating only systems including: forced air (gas, oil & electric), hot water & steam, heat pumps without backup.

  • Single-Stage Heating and Cooling: No
  • Multi-Stage Heating and Cooling: No
  • Heating Only: Yes
  • Cooling Only: No
  • Compatible with Warm Air Furnace: Yes
  • Compatible with Central Air Conditioning: No
  • Compatible with Heat Pump (No Aux./EM): No
  • Compatible with Heat Pump (With Aux./EM): No
  • Compatible with Hot Water: Yes
  • Compatible with Steam or Gravity: Yes
  • Use with Floor/Wall Furnace 24V or 750mV: No
  • Use with Volt Gas Fireplace 24V or 750mV: No
  • Use with Pellet Stove for mV Thermostats: No
  • Use with Electric Baseboard 120V-240V: No
Product Details
Product Specs
Product Manuals
Honeywell Home Round Heat Only Non-Programmable Manual Thermostat - CT87K Video

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CT87K1004/E1 customer reviews

Overall Rating

5 Reviews
4 customers recommend this product
Honeywell Home Round Heat Only Non-Programmable Manual Thermostat - CT87K Reviews
Roland Dumas
July 6, 2020
Verified Purchase

Great product consistent with its name, keep up the great work. Thanks

Thomas Hayes
December 24, 2018
Verified Purchase
not good

The temperature control part works but the thermometer to read room temp did not work from day 1. I needed the thermostat so will have to live with what i got. Poor quality control

We apologize for the inconvenience. We'd be happy to assist you in resolving this matter. Please see the following attachment for additional information: Return Policy and Instructions
Dianne Karl
November 13, 2018
Verified Purchase

Very satisfied, fast delivery, good instructions, easy to install.

March 13, 2018

So easy to install. Best thermostat on the market, . I had an old one with the mercury And it lasted over 30 yrs. New one works effectively.

Brian  Reshetnik
November 24, 2016
Verified Purchase

Nice product I have used it in two different houses over two decades no problems. Keep making the product.

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