Set your thermostat to your desired comfort level. Regardless of outside temperature changes due to sunny days or cold windy nights, your thermostat will maintain a steady house temperature without any adjustments.
Furnaces
When you compare the cost of the Keystoker with any automatic hot water heating unit, you’ll realize how reasonable Keystoker is priced.
Boilers
Keystoker is most economical and efficient using anthracite rice or buckwheat coal. The savings on fuel bills alone will pay for your Keystoker in the course of time.