HVAC Systems & Components
Heating Ventilating Air Conditioning HVAC
Typical HVAC damper pressure drop vs flow velocity graph. Units are inches and fpm (feet per minute).
Where:
V (Velocity) = CFM/(Square ft. Damper Area)
Adapted from HVAC Systems Duct Design, Third Edition, 1990,
Sheet Metal & Air Conditioning Contractor's National Association
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