⚡ NFPA 92 (High-Speed Actuated Relief Bypass Damper <3s, Preventing Overpressure)

Smoke Control Modulating Bypass Calculator

Size high-speed actuated modulating barometric and motorized bypass relief dampers for stairwell and elevator smoke pressurization systems: calculate dynamic airflow bypass response time (<3 seconds to modulate open when stairwell egress doors slam shut, preventing excessive overpressure >0.35" WC that traps occupants inside), and life safety mechanical margins.

1. Project & Operating Inputs

Bypass Stations Engineered (Station Count e.g. 6 Relief Bypass Dampers)

Peak Bypass Airflow (CFM e.g. 18,000 CFM Maximum Bypass)

Customer Bid Price for Supplied & Calibrated Bypass Package ($ / Unit)

High-Speed Belimo Fast-Running Actuator (<2s), Low-Leak Damper, Sensor ($)

2. Financial Breakdown & Yield

NFPA 92 FAST BYPASS DAMPERS

Turnkey Fast Relief Damper Package Profit

Pressurization Controls Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost