Condensing boilers fueled by natural gas or propane are VERY efficient, often running at 95% efficiency. A condensing boiler takes advantage of the fact that when the fire burns at a lower temperature, it can condense and make water vapor that is used to pull more heat energy out of the heat exchanger. This increases efficiency and saves on gas or propane use over the life of the boiler. Condensing boilers also draw in outside air to burn, meaning less heat loss from your home. We have installed