🌱 Flue Gas Recirculation (FGR 10-20% Flow) to Cut Flame Temp & Meet <9 ppm NOx

Boiler Low-NOx Flue Gas Recirculation (FGR) Calculator

Size Flue Gas Recirculation (FGR) piping ducts and modulating control dampers for ultra-low NOx industrial burners (<9 ppm / 3 ppm NOx limits under SCAQMD Rule 1146): calculate required FGR percentage (10% to 20% recirculated exhaust gas diluting flame core oxygen and lowering peak combustion temperatures), and emissions retrofit profits.

1. Project & Operating Inputs

Boiler Firing Rate (MMBTU / Hr e.g. 42.0 MMBTU/Hr Burner)

Target NOx Emission Limit (PPM @ 3% O2 e.g. 9.0 PPM Low-NOx)

Customer Bid Price for Supplied & Connected FGR Low-NOx Package ($)

Ultra-Low NOx Burner Head, Insulated FGR Ductwork, Auto Damper & Crew ($)

2. Financial Breakdown & Yield

SCAQMD LOW-NOX FGR DUCT SIZING

Turnkey Low-NOx Burner Retrofit Profit

Environmental Combustion Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost