The Honeywell CT50K1002 Standard Heat Only Manual Thermostat is a non-programmable thermostat designed specifically for heating systems. This manual thermostat comes equipped with an integrated thermometer and is relatively simple to install. The design of this heat only thermostat allows for seamless accessibility and installation. The swift installation process coupled with the manual thermostat's size adds a lot of versatility to a product that's already flexible. The Honeywell CT50K1002 Manual Heat Only Thermostat is compatible with gas fireplaces and furnace systems that utilize hot water, steam or gravity.