Characterization of the U.S. Industrial Commercial Boiler Population

Boiler Units
6,000
5,000
4,000
3,000
2,000
1,000
-
Figure A-6 Summary of Commercial Boilers in EPA's ICCR Database
1,265
21,966
714
6,025
3,295
35,761
5,406
91,577
202
2,617
Office Warehouse Retail Education Public
Assembly
A.6 EPA’s ICI Database
110
870
Boiler Units
Boiler Capacity
Energy and Environmental Analysis, Inc. A-9
4,406
64,510
1,108
Lodging Health Other
10,497
120,000
100,000
ICF Consulting produced the Industrial/Commercial/Institutional (ICI) database to
support EPA’s rulemaking process for new air pollution control regulations. The most
recent available version was last updated in 1999. The ICI database, summarized in
Figure A-7, includes 40,000 industrial boilers with an aggregate capacity of 2.8 million
MMBtu/hr. Like the ICCR database, the ICI database is skewed toward larger units, with
lesser coverage of smaller boilers. The average unit size is 71 MMBtu/hr compared to 31
MMBtu/hr for the final composite inventory of industrial boilers. The distribution of
boilers is similar to the ICCR database with most of the boilers in the food, chemicals and
other manufacturing industries. Although the ICI database contains more than 90 percent
of the number of boilers larger than 250 MMBtu/hr in the final inventory, it contains only
42 percent of the number smaller than 50 MMBtu/hr.
80,000
60,000
40,000
20,000
-
Boiler Capacity (MMBtu/hr)