Industrial/Commercial/Institutional Boilers
and Process Heaters NESHAP Summary
Main : 1 :
2 : 3 : 4 : 5 : 6 : 7 : 8
2. What Type Units Are NOT Affected by the Final Boiler
MACT Rule?
US EPA Combustion - Air Rules Web Site
 Waste heat boilers are excluded from the definition of
boiler. A waste heat boiler (or heat recovery steam generator)
means a device, without controlled flame combustion, that
recovers normally unused energy and converts it to usable
heat. Waste heat boilers incorporating duct or supplemental
burners that are designed to supply 50 percent or more
of the total rated heat input capacity of the waste heat
boiler are considered boilers and not waste heat boilers.
Emissions from a combustion unit with a waste heat boiler
are regulated by the applicable standards for the particular
type of combustion unit. For example, emissions from a
commercial or industrial solid waste incineration unit,
or other incineration unit with a waste heat boiler are
regulated by standards established under section 129 of
the Clean Air Act.
Hot water heaters also are not regulated under the final
rule. A hot water heater is a closed vessel, with a capacity
of no more than 120 U.S. gallons, in which water is heated
by combustion of gaseous or liquid fuel and is withdrawn
for use external to the vessel at pressures not exceeding
160 pounds per square inch gauge and water temperatures
not exceeding 210 degree Fahrenheit (99 degrees Celsius).
Temporary boilers also are not regulated under the final
rule. A temporary boiler is any gaseous or liquid fuel-fired
boiler that is designed, and is capable of, being carried
or moved from one location to another, and remains at any
one location for less than 180 consecutive days. Additionally,
any new temporary boiler that replaces an existing temporary
boiler and is intended to perform the same or similar function
will be included in the determination of the consecutive
180-day time period.
Boilers or process heaters that are used specifically
for research and development are not regulated under the
final rule. However, units that only provide steam to a
process at a research and development facility are still
subject to the final rule. Process heaters do not include
units used for comfort heat or space heat, food preparation
for on-site consumption, or autoclaves.
Boilers & Process Heaters NOT subject to Boiler MACT
See
Boiler MACT Rule (40 CFR 63.7491)
-
Municipal waste combustor covered by 40 CFR part 60,
subpart AAAA, subpart BBBB, subpart Cb or subpart Eb
-
Hospital/medical/infectious waste incinerator covered
by
40 CFR part 60, subpart Ce or subpart Ec
-
An electric utility steam generating unit that is a fossil
fuel-fired combustion unit of more than 25 megawatts
that serves a generator that produces electricity for
sale
-
Hazardous waste boilers
-
Commercial and industrial solid waste incineration unit
covered by 40 CFR part 60, subpart CCCC or subpart DDDD
-
Recovery boiler or furnace covered by 40 CFR part 63,
subpart MM
-
Boiler or process heater that is used specifically for
research and development
-
Hot water heater < 120 gallons
-
Refining kettle covered by 40 CFR part 63, subpart X
-
Ethylene cracking furnace covered by 40 CFR part 63,
subpart YY
-
Blast furnace stoves
-
Any boiler and process heater specifically listed as
an affected source in another standard(s) under 40 CFR
part 63
-
Any boiler and process heater specifically listed as
an affected source in another standard(s) established
under section 129 of the CAA
-
Temporary boilers
-
Blast furnace gas fuel-fired boilers and process heaters
Main : 1 : 2 : 3 : 4 : 5 : 6 : 7 : 8
|
