A high-efficiency boiler is a heating system designed to convert fuel into heat with minimal energy loss. These boilers typically achieve efficiency ratings of 90% or higher, meaning they use most of the energy from the fuel to produce heat for homes or buildings. This efficiency is often achieved through advanced technology, such as condensing heat exchangers, which capture and reuse heat from exhaust gases. By using a high-efficiency boiler, homeowners can reduce their energy bills and lower their carbon footprint. Many models are compatible with various fuel types, including natural gas, propane, and oil, making them versatile options for heating needs.