Put one in many years ago at the customers request...their mother with Alzheimers lived with them and if she was cold, she cranked it up and they came home to a 85 degree house all the time...I deal with lots of customers that think a thermostat is a cold or heat control and the lower or the higher you crank it, the faster it will get to a temp...all you can do is try to educate them...p.s....it still doesn't work...they all have Alzheimers symptoms