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HVAC - Guide to Demand Control Ventilation

COURSE NO: M04-037
HVAC - Guide to Demand Control Ventilation
Course Highlights

This online engineering PDH course provides the framework necessary for integrating DCV into an HVAC system and includes background on ASHRAE ventilation standards. The course will take the reader through the design process and calculations needed to understand how to properly implement a DCV strategy.


The ventilation rate inside a building is directly dependent on the number of occupants in the space. If we had the ability to economically count each person as they enter and exit the space, then we could provide exactly enough ventilation air to meet the needs of the quantity of people in the space. But in most buildings occupancy is not tracked in real-time and therefore finding the right balance in ventilating your building is a challenge.


Most HVAC engineers and designers design ventilation system on the maximum anticipated building occupancy. This results in a waste of energy and money due to over-ventilation during lean periods. Demand Control Ventilation (DCV) is a ventilation control strategy that provides just the right amount of outside air the humans need. This accomplishes two things: First, it saves energy by not heating or cooling unnecessary quantities of outside air, and second, it can provide assurance that sufficient outside air is being supplied for the number of occupants present.


This 4 PDH online course is intended for Mechanical and HVAC engineers, architects, building designers, energy auditors, facility managers, property & estate managers, operation & maintenance personnel, as well as other professionals interested in gaining an understanding of the application of Demand Control Ventilation systems.

Learning Objectives

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

  • Understanding what demand-controlled ventilation (DCV) is
  • Learning how DCV is different from fixed ventilation strategy
  • Knowing which spaces would benefit most from DCV
  • Understanding what a CO2 based ventilation is and the relationship between CO2 and the outside airflow rate into the space
  • Learning how to determine whether your space is appropriate for DCV
  • Learning how to estimate the minimum ventilation rate and the base ventilation rate for non-occupant related sources
  • Understanding the primary differences between the ASHRAE 62-(1989 thru 2001) standards and the ASHRAE 62-2004 standard
  • Knowing what type of CO2 sensor specifications is appropriate for the ventilation control
  • Knowing the ideal location of CO2 sensors for constant volume and variable volume systems Understanding how the quantity of CO2 sensors is determined
  • Learning about the commissioning requirements for CO2 based DCV
  • Understanding the important design issues that need to be accounted in design of CO2 based DCV
  • Learning about the important building codes/standards other than ASHRAE apply to DCV
Course Document

In this professional engineering CEU course you will need to review the course document titled "HVAC - A Guide to Demand Control Ventilation".

To view, print and study the course document, please click on the following link(s):
HVAC - Guide to Demand Control Ventilation (809 KB)
Course Quiz
Once you complete this course review you will need to take a multiple choice quiz of twenty five (25) questions to earn 4 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: