ACCA’s Manual D (Duct Design)

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  • June 7, 2022
    8:00 am - 4:00 pm

Understanding Manual D – In One Day!

A key to comfort is about adding or removing the right amount of heat to keep customers happy.  Easy rules-of-thumb lead to duct designs that cannot and will not deliver comfort.  Many weak contractors fail to do a little leg work to set themselves up for success.

This course covers the fundamentals of residential duct design based on the nationally recognized standard. The class will break it down in a way that’s easy to understand and apply. This program is designed for the HVAC professional who will use both a pen and paper, or a computer-based program to calculate duct sizes for residential structures. This program gives the user all the information necessary to use either method effectively. This class will also briefly discuss what’s needed for good room air mixing, selecting grills and registers (Manual T).                                                                           

Topics covered include:

  • • Duct Sketch
  • • Total Effective Length Calculation (TEL)
  • • External Static Pressure
  • • Component Losses (Pressure Drops)
  • • Available Static Pressure
  • • Friction Rate
  • • Use of a Duct Slide
  • • Sizing of Branch Runs
  • • Sizing of Trunk Ducts
  • • Supply Register / Return Grille Sizing
  • • Supply Outlet & Return Placement

Registration fees includes: Catered lunch

Instructor: Ed Janowiak, Manager HVAC Design Education at Air Conditioning Contractors of America (ACCA), has 35-plus years of HVAC experience and more than 20 years delivering technical topics from his time as the technical director at Eastern Heating and Cooling Council based out of Mt. Laurel, New Jersey. He has more than 15 years of practical experience in the field as a service manager, technician, and installer working at various companies and as the owner and president of Bramante Energy Inc.


Venue Phone: (717) 939-1781

Venue Website:

PPA Training Center, 911B South Eisenhower Boulevard, Middletown, Pennsylvania, 17057, United States


911B South Eisenhower Blvd
Middletown, PA  17057