Boilers are used in power plants in order to produce high pressured steam so that the plant can generate electricity. The boiler takes in energy from some form of fuel such as coal, natural gas, or nuclear fuel to heat water into steam. The steam then powers a turbine, which generates electricity.
The U.S. EPA created the National Emission Standards for Hazardous Air Pollutants (NESHAP) from three major source categories:
Commercial and Institutional Boilers
The emission standards must reflect the application of the maximum-achievable control technology (MACT). Thus, the NESHAP rule is commonly known as the Industrial Boiler MACT, or IB MACT.