Honeywell YCT30A

Bimetal temperature sensor Decorative back plate included Low voltage control of gas or oil heating and cooling equipment Simple, worry-free operation Snap acting switch (magnetic switch) does not require leveling and is mercury-free 24-volt heating systems. Low voltage control of gas or oil heating equipment. Bimetal temperature sensor. Snap acting switch (magnetic switch) does not require leveling and is mercury-free. Simple, worry-free operation. Compatible for heating, furnace (warm air), hot water, steam or gravity and gas fireplaces. Economy, heat only thermostat, simple worry free operation, bi-metal temperature sensor, snap action switch, mercury free, decoration back plate included, does not work with heat pumps.