Energy Recovery Ventilation (ERV) for High-Volume Fresh Air Applications (Ohio T&M)

Training overview
Professional Course
Self-paced Online
1 hour
From 30 USD
Start dates
30 USD
Start anytime!
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Course description

In Energy Recovery Ventilation (ERV) for High-Volume Fresh Air Applications , you'll learn ...

  • What is ERV and why it is an attractive option for spaces requiring a continuous supply of outside air
  • The difference between HRV and ERV with regards to latent heat transfer and why that is an important consideration
  • Why a run-around loop is a better option than a rotary enthalpy wheel if cross-contamination is an issue
  • Why a recuperator has a higher chance of frosting in the winter relative to other options


To meet the Ohio Board's intent that online courses be "paced" by the provider, a timer will be used to record your study time. You will be unable to access the quiz until the required study time of 50 minutes has been met.

Credit: 1 PDH

Length: 16 pages

Energy recovery ventilation (ERV) is the process of exchanging the energy contained in normally exhausted building or space air and using it to treat (precondition) the incoming outdoor ventilation air in residential and commercial HVAC systems. During the warmer seasons, the system pre-cools and dehumidifies while humidifying and pre-heating in the cooler seasons.

Energy recovery can substantially reduce the mechanical heating and cooling requirements associated with conditioning ventilation air in spaces requiring large amounts of outside air. Spaces like battery rooms and laboratories typically require 100% outside air at high ventilation rates— between 6 and 15 air changes per hour—primarily for safety reasons.

Heating and cooling systems can be downsized when energy recovery is used, because energy recovery systems reduce peak heating and cooling requirements. The only energy penalty is the power needed for the blower to overcome the pressure drop in the system.

In this course, we’ll review several types of ERV systems, including operating principles, materials of construction, typical applications, benefits and challenges.

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Certificate of Completion

You will be able to immediately print a certificate of completion after passing a multiple-choice quiz consisting of 10 questions. PDH credits are not awarded until the course is completed and quiz is passed.

Training content

This course teaches the following specific knowledge and skills:

  • The benefits of using ERV
  • Recommended pressure drop targets for the supply and exhaust streams
  • Typical heat exchange efficiencies with ERV
  • Operating principles, features, and benefits of rotary enthalpy wheels, recuperators, heat pipes and run-around loops
  • Key issues and design considerations with ERV systems
  • Standards for testing the performance of ERV equipment and standards that specify when energy recovery must or must not be applied
  • Real world ERV performance examples


This course costs $29.95 - Contact PDHengineer to learn about discounts and upcoming offers

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7915 FM 1960 West, Suite 130
77070 Houston Texas

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