Honeywell 661185 Honeywell Heat-Cool Easy-To-See T-Stat
5-Year Warranty. The easy-to-see face has enlarged scale and raised numbers - -plus it click at every 2�F change. Mercury Free. Classic Styling. Premier Whit. Separate temperature setting and thermometer. The T87K heat only works with 2 or 3 wire heat only systems. The Round T87K and T87N thermostats provide electronic control of 24Vac heating and cooling systems with the classic twist to set dial.