🔥 NFPA 96 Section 8.3 (Supply 80%-90% of Exhaust CFM, Direct-Fired Gas Burner MBH)

Kitchen Make-Up Air Unit (MAU) Calculator

Calculate airflow balancing and heating burner thermal capacity for direct-fired gas kitchen Make-Up Air Units (MAU) under NFPA 96 Section 8.3: calculate supply air replacement (supplying 80% to 90% of total hood exhaust to maintain slight negative pressure without backdrafting water heaters), winter gas heating MBH, and HVAC installation margins.

1. Project & Operating Inputs

Total Kitchen Hood Exhaust Airflow (CFM e.g. 8,000 CFM Total Hoods)

Make-Up Air Supply Target (% e.g. 85.0% Supply Replacement)

Customer Bid Price for Supplied & Craned Direct-Fired Gas MAU ($)

Direct-Fired Modulating Burner, Supply Fan, Roof Curb, Plumber & Tech ($)

2. Financial Breakdown & Yield

NFPA 96 MAKE-UP AIR BALANCE

Turnkey Kitchen MAU Skid Profit

Commercial HVAC Heating Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost