NOx down to <10 ppm
	Capacity 50 - 2,500 HP
	Gas only

Ultra Low NOx without external FGR! The Johnston FIR burner reduces emissions of NOx and CO from natural gas combustion. The burner can reach levels of less than 10 PPMv NOx and <50 PPMv CO at design turndown with no decrease in efficiency. To maintain the burner/boiler thermal efficiency, the burner is setup to operate at between 3 to 4% O2 over the complete operating range. This minimizes dry gas losses and maximizes burner performance.

The patented FIR Burner through Gas Technology Institute, Chicago, IL, combines staged, premixed combustion with forced internal flue gas recirculation to minimize the formation of both thermal and prompt NOx. The unique burner design provides excellent flame retention for stable combustion at the sub 9 PPM NOx levels. The low levels if NOx and CO will meet the stringent emission requirements found in California, Houston and other non-attainment zones.

Using the FIR burner, boilers can operate at low excess air levels without external FGR, resulting in higher thermal efficiencies than are achievable with competing technologies. The burners are non-proprietary, single point positioning controls to reduce cost and downtime.

The burners also meet CSD-1, FM, IRI and NFPA-85 approval codes.