The Burnham Alpine Boiler is a gas fired, condensing stainless steel boiler. The Alpine is Energy Star rated, with an efficiency rating of 95 AFUE. The Alpine features a stainless steel heat exchanger and smart controls, which allow settings to be adjusted with the push of a button. The easy to remove control panel allows for easy servicing, and the gas, water, and electrical connections are all made from the left side of the boiler. The Alpine comes in seven models, ranging in size from 80,000 to 500,000 BTU's, and can be converted from natural gas to LP gas with the turn of a screw.