Boilers, which have an average overall cost of about $7,000 for a replacement unit, commonly use natural gas, propane, oil, or electricity as their fuel. Their efficiency level is denoted by AFUE ...

Sunapee Middle-High School is swapping out its old oil-fueled heating system and switching to renewable wood fuel.

Oil is an efficient fuel, so you get a good return on each unit of energy Replacing a standard oil boiler with a more efficient modern condensing one is relatively straightforward You can stock-up on ...

When discussing boiler efficiency improvements, three primary applications are involved: Accurate inlet air and fuel (natural gas, waste gas, oil, or coal) measurement for efficient combustion. Inlet ...