🏢 Pressurization (Positive +0.02" to +0.05" WC, Gravity Relief Dampers Sq Ft)

Building Pressure Relief Damper Calculator

Size gravity and barometric pressure relief dampers and motorized relief louvers for facilities equipped with dedicated direct-fired make-up air systems: maintain ideal positive building pressurization (+0.02" to +0.05" WC) to prevent exterior door blowing open or slamming while stopping cold air infiltration, and air balancing yields.

1. Project & Operating Inputs

Excess Relief Airflow (CFM e.g. 12,000 CFM Net Building Over-Pressure)

Design Relief Velocity (FPM e.g. 1,000 FPM Low-Resistance Exhaust)

Customer Bid Price for Supplied & Framed Gravity Relief Dampers ($)

Ruskin Counterbalanced Aluminum Dampers, Weather Hood, Tech ($)

2. Financial Breakdown & Yield

BAROMETRIC RELIEF DAMPERS

Turnkey Pressure Relief Damper Installation Profit

Commercial Air Balancing Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost