📐 AMCA Publication 201 (System Effect Factor SEF, Duct Elbow Swirl & Static Loss)

Fan System Effect Factor (SEF) Calculator

Quantify aerodynamic performance loss (System Effect Factor SEF in. wg) caused by poor ductwork transitions, tight inlet elbows, and abrupt outlet expansions under AMCA Publication 201: calculate velocity pressure derating (SEF = K x VP), prevent field airflow shortfalls, design aerodynamic turning vanes, and air balancing profits.

1. Project & Operating Inputs

Fan Inlet Velocity (FPM e.g. 3,200 FPM Duct Velocity)

Inlet Elbow Radius Ratio (R/D e.g. 0.75 Sharp Elbow without Vanes)

Customer Invoiced Contract Fee for TAB Audit & Turning Vanes ($)

Aerodynamic Turning Vane Splitters, Field TAB Team, Manometer Testing ($)

2. Financial Breakdown & Yield

AMCA 201 SYSTEM EFFECT

Turnkey Aerodynamic Duct Optimization Profit

Air Balancing & TAB Contractor Margin

0.0%

Gross Revenue / Bill

Total Project CapEx

Operating / Direct Cost