PRODUCT DESCRIPTION With its familiar circular design and simple twist action, The Round® Non-Programmable Thermostat makes setting your ideal temperature quick and easy. Plus, the popular thermostat design fits perfectly into your home. FROM THE MANUFACTURER The Round Manual thermostat by Honeywell Home is the world's most popular thermostat - installed in over 70 million homes and buildings. This CT87K heat only model provides precise accurate performance with the ease of use that you've grown accustomed to - simply turn the dial to desired temperature and let the thermostat take over.