🚪 IBC 909 / NFPA 92 (0.10" to 0.35" WC Delta P, Door Opening Force <30 Lbs)

IBC 909 Stairwell Pressurization Calculator

Size dedicated emergency life safety stairwell pressurization fans for high-rise commercial buildings under IBC Section 909 & NFPA 92: calculate required injection airflow (maintaining positive pressure between 0.10" and 0.35" WC [25 to 87 Pa] to prevent smoke infiltration while keeping maximum door opening force strictly < 30 lbs for safe occupant egress), and smoke control margins.

1. Project & Operating Inputs

High-Rise Stairwell Floors (Story Count e.g. 24 Stories High-Rise)

Stairwell Door Leaf Count (Door Count e.g. 26 Egress Fire Doors)

Customer Bid Price for Supplied & Commissioned Pressurization System ($)

Vane-Axial Fan, Multi-Point Injection Ductwork, Barometric Relief, Tech ($)

2. Financial Breakdown & Yield

IBC 909 STAIRWELL PRESSURIZATION

Turnkey Stairwell Smoke Control Profit

Life Safety HVAC Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Material Cost