New low NOx rules adopted Dec. 7, 2018.
The Southern CA Air Quality Management District lowered the amount of NOx emissions allowed for firetube boilers from 9 ppm to 7 ppm. NOx limits remain at 9 ppm for all other commercial and industrial heating equipment. R.F. MacDonald Co. created an easy to read, downloadable compliance chart as a quick reference guide.
Compliance Chart – 2019 SCAQMD Rule 1146 and 1146.1
Rule 1146 applies to boilers, steam generators and process heaters of equal to or greater than 5 million Btu per hour rated heat input capacity used in all industrial, institutional and commercial operations with the exception of:
(1) boilers used by electric utilities to generate electricity; and
(2) boilers/process heaters greater than 40 MMBtu/Hour used in petroleum refineries; and
(3) sulfur plant reaction boilers.
(4) RECLAIM facilities (NOx emissions only)
Rule 1146.1 applies to boilers, steam generators and process heaters that are greater than 2 million Btu per hour and less than 5 million Btu per hour rated heat input capacity used in any industrial, institutional or commercial operation with the exception of RECLAIM facilities (NOx emissions only).
Source: AQMD Rules and PDF of Rule 1146 Amendments.
Keywords: Clear the Air, Boiler Compliance, NOx Emissions, NOx Compliance, Compliance Chart, Heat Input Capacity, New 1146 Rule