Online Courses

Discount Packages

Ethics, Laws and Rules

Live Webinars

Video Presentations

Interactive Courses

OH Timed & Monitored

Courses by Provider

HVAC - How to Size and Design Ducts

COURSE NO: M06-032
HVAC - How to Size and Design Ducts
Course Highlights

This online engineering PDH course reviews the above criteria in detail and provides guidance on the planning, layout and sizing of supply and return air ducts.


In air conditioning systems the duct is considered a static component of the installation through which air flows within the building, connecting all parts of the system. Ducts can be best described as arteries of the central air-conditioning system. These play an important role in keeping the whole HVAC system fit and achieving comfortable conditions throughout its life span.


Defects in a duct system can waste hundreds of dollars a year by forcing the HVAC system to run longer than necessary. Ductwork problems also make certain rooms too hot or too cold at different times of the year, while introducing dirt and bad odors into the forced-air system.


The objective of good duct design is to:

  • Optimize duct size (manufacturing costs);
  • Minimize duct system friction losses (operational cost);
  • Reduce duct system acoustics (environmental costs); and
  • Minimize air balance procedures (commissioning costs).


This 6 PDH online course is intended for mechanical and HVAC engineers, architects, building designers, contractors, energy auditors, facility managers, property and estate managers, O&M personnel, and other professionals interested in gaining a better understanding of sizing and designing duct systems.

Learning Objectives

This PE continuing education course is intended to provide you with the following specific knowledge and skills:

  • Learning about the velocity and pressure classifications of ductwork
  • Applying various materials and shapes that provide the most cost effective alternative
  • Learning about the various supply air duct configurations
  • Learning about the various duct sizing methods, including the velocity method, equal friction method and static regain method
  • Understanding the interaction between fan and duct systems
  • Learning about duct construction and reinforcement
  • Familiarizing with sound engineering practices for duct layout and routing
  • Learning about ductwork testing and estimating system performance
  • Learning about the various duct cleaning methods
  • Knowing the typical performance characteristics of a duct system
  • Understanding the importance of system balancing and optimization
Course Document

In this professional engineering CEU course you will need to review the course document titled "HVAC - How to Size and Design Ducts".

To view, print and study the course document, please click on the following link(s):
HVAC - How to Size and Design Ducts (4.9 MB)
Course Quiz
Once you complete this course review you will need to take a multiple choice quiz of thirty (30) questions to earn 6 PDH credits. The quiz will be based on the entire course document.


The minimum passing score is 70%. There is no time limit on the quiz, and you can take it multiple times until you pass at no additional cost.
Certificate of Completion

Upon successful completion of the quiz, print your Certificate of Completion instantly. (Note: if you are paying by check or money order, you will be able to print it after we receive your payment.) For your convenience, we will also email it to you. Please note that you can log in to your account at any time to access and print your Certificate of Completion.

To buy the course and take the quiz, please click on: