Introducing HeatManager - the newest technology in boiler controls for saving fuel and money with residential hot water heating systems The HeatManager fuel economizer is the newest advance in boiler controls for residential boilers. It works with any fuel, and improves hot water home heating systems. And, it's guaranteed to reduce heating fuel consumption by at least 10%! This improves the efficiency of most gas, oil, or propane-fired residential boiler home heating systems, resulting in fuel and energy savings. It automatically adjusts the burner run pattern to match the system's heat load, substantially improving efficiency. You will experience lower gas, propane and heating oil bills, while improving boiler efficiency. It adds patented, state-of-the-art microprocessor technology to the boiler to optimize the overall heating system efficiency. When installed on a new or existing boiler heating system, it reduce fuel consumption, wear on parts, flue emissions, and electrical usage. Best of all, lower heating bills are guaranteed! You will experience a savings of 10 to 20% in heating fuel usage. Includes one sensor, optional 7518 sensor may be purchased.FEATURESMake your home more comfortable and energy-efficient today.The HeatManager fuel economizer is the newest advance in boiler controls for residential boilers.This improves the efficiency of most gas, oil, or propane-fired residential boiler home heating systems.Includes one sensor, optional 7518 sensor may be purchased.