Commercial Boiler Repair & AQMD Rule 1146 Low-NOx Retrofits
Specification: CA Lic C-4 Boiler • SCAQMD Certified Tune-Ups
South Coast AQMD Rule 1146, 1146.1 & 1146.2 compliance. Ultra-low NOx burner retrofits, annual source testing, combustion tuning, and high-pressure steam repairs.
Engineering Scope & Overview
The South Coast Air Quality Management District (SCAQMD) enforces the nation's strictest industrial boiler emission regulations across Los Angeles, Orange, Riverside, and San Bernardino counties. Commercial boilers firing on natural gas must meet strict 9 to 12 ppm NOx limits or face immediate cease-and-desist orders and escalating daily fines. Western Mechanical Inc. holds California C-4 Boiler and C-20 HVAC licenses and specializes in turnkey AQMD Rule 1146/1146.1/1146.2 compliance. We engineer and install ultra-low NOx surface-stabilized premix burners, flue gas recirculation (FGR) systems, digital O2 trim controllers, and conduct certified tune-ups with full SCAQMD audit documentation.
WMI Field Protocol & Certified Best Practices
- Certified calibrated flue gas combustion analysis with oxygen, CO, and NOx printouts
- Ultra-low NOx surface premix burner upgrades meeting 9 ppm and 12 ppm thresholds
- Feedwater deaerator maintenance, safety relief valve testing, and blowdown inspection
- Turnkey SCAQMD permit application filing and source testing coordination
Frequently Asked Questions
- What are the mandatory NOx limits under SCAQMD Rule 1146 in Southern California?
- Rule 1146 applies to boilers >= 5 million BTU/hr requiring 9 ppm NOx or 0.011 lbs/MMBtu. Rule 1146.1 applies to 2 to 5 MMBtu/hr units (9 to 12 ppm), and Rule 1146.2 governs smaller units below 2 MMBtu/hr (12 to 20 ppm).
- Does Western Mechanical provide certified annual boiler tune-up reports for AQMD inspectors?
- Yes. Our technicians execute certified 12-point combustion audits using calibrated electronic flue analyzers and provide the exact signed compliance forms required during air district inspections.
- Do you service high-pressure industrial steam boilers and hydronic heating systems?
- Yes. Our union steamfitters rebuild high-pressure steam boilers, condensate return tanks, feedwater economizers, mud drums, and low-water cutoffs.
Emergency Dispatch & RFP Inquiry
Contact Western Mechanical Inc. toll-free at (800) 585-5085 for commercial and industrial service across Southern California.