Introduction to Air Distribution & Duct Design
Session 1: Tuesday, October 21, 2025
This session is now full. To be added to a waitlist, please contact training@goodinco.com
8:30am - 2:00pm
Goodin Minneapolis Branch
2700 N 2nd St,
Minneapolis, MN 55411
Session 2: Wednesday, October 22, 2025
This session is now full. To be added to a waitlist, please contact training@goodinco.com
8:30am - 2:00pm
Chippewa Valley Technical College
620 W Clairemont Ave,
Eau Claire, WI 54701
Training Topics:
Introduction to Air Distribution & Code Standards
Importance of a well-designed air distribution system in residential HVAC
Overview of ACCA design protocols (especially Manual J & Manual D)
Manual J Load Calculation Fundamentals
Navigating the Manual J Speedsheet
Extracting key inputs: heating and cooling loads per zone
Load Calculation Applications
Determining total heating/cooling requirements
Impact on blower selection and duct sizing baseline
Duct Design Essentials (Manual D)
Understanding duct friction rate and the ACCA “wedge” range (0.06–0.18 IWC/100 ft)
Calculating total effective length (TEL) including fittings
Applying the Manual D Speedsheet or ACCA tools/software
Duct Sizing Mechanics
Using friction charts, slide rules, and spreadsheets
Practical sizing for trunks, branches, and returns using CFM targets and calculated friction rates