Press Release

ACGIH® Presents Managing Energy in Ventilation Systems: Variable Frequency Drives (VFDs) Webinar



Cincinnati, Ohio — September 11, 2008 — ACGIH® will present the Managing Energy in Ventilation Systems: Variable Frequency Drives (VFDs) webinar on November 19, 2008 at the following times:

2:00 p.m. – 4:30 p.m. Eastern Time
1:00 p.m. – 3:30 p.m. Central Time
12:00 p.m. – 2:30 p.m. Mountain Time
11:00 a.m. – 1:30 p.m. Pacific Time

Ventilation systems are inefficient by nature. Over 40% of the horsepower (HP) in most plants is expended on powering fans and pumps. In ventilations systems for large buildings, variable frequency drives (VFDs) on fans will save energy by allowing the volume of air moved to match the system demand. Current VFD costs have decreased in recent years to a point where they can be incorporated into almost all ventilation designs. They also have flexibility of control and offer considerable electrical energy savings through greatly reduced electric bills. VFDs also have special requirements to provide stable operation and to maximize energy savings potential. This webinar will provide key information regarding the use of VFDs as well as how they work to reduce plant operating costs. Practical examples will be demonstrated during the live webinar and attendees will have an opportunity to ask questions in a real-time setting via a chat feature.

After participating in this webinar, attendees will be better able to understand:

  • How the use of variable speed systems can help a large building save energy
  • How VFDs can be used for improved system reliability and system life
  • How system and fan curves interact
  • The system curve in a variable pressure system
  • How air density affects fan and system curves

Industrial Hygienists, Occupational and Environmental Health Professionals, Safety Professionals, Environmental Engineers, and Plant and Facility Managers should consider attending this important educational event.

ACGIH® is pleased to offer webinar attendees a new audio option. U.S. and Canadian attendees can connect to the audio portion of the webinar via the toll-free audio telephone link or listen to the audio portion through an audio stream directly through their computer. Other international participants can listen via the audio stream without incurring additional telephone charges.

Jonathan F. Hale, MS is the founder and co-owner of Jackson-Hale Environmental Technologies, an innovator in the industrial pollution-control industry. Mr. Hale has also worked as an EPA inspector and permits engineer. He is the winner of two national level ASHRAE awards for excellence in energy efficient design of industrial ventilation systems and is the co-chair of the North Carolina Industrial Ventilation Conference. Mr. Hale obtained a Bachelor's of Science degree from Wake Forest University and a Master of Arts degree in Political Science from Appalachian State University. He is a member of the ACGIH® Industrial Ventilation Committee.

Gerry A. Lanham, PE is the President of KBD/Technic, Inc., a CECO Environmental Company. Mr. Lanham has over 43 years of experience in the design, testing and installation of industrial ventilation systems and is the co-author of a patent for HVAC controls and a system for protection against biohazard attack. He is the co-chair of the North Carolina Industrial Ventilation Conference as well as an instructor for NIOSH and numerous other local ventilation courses. Mr. Lanham completed a Bachelor's of Science degree in mechanical engineering at the University of Cincinnati and an MBA in advanced business economics at Xavier University. He is Vice Chair of the ACGIH® Industrial Ventilation Committee.

This webinar is pending approval by the American Board of Industrial Hygiene (ABIH) for .5 ABIH (IH) Certification Maintenance (CM) Point. This webinar qualifies for .15 BCSP (SP) Continuance of Certification (COC) Point for Certified Safety Professionals. Participants seeking CM or COC points must attend the live webinar or view the archive and submit a final exam and evaluation. Certificates of Completion will be issued in a timely manner after receipt and completion of these items.

For more detailed information about the Managing Energy in Ventilation Systems: Variable Frequency Drives (VFDs) webinar, contact Tammy Vanderbilt at or 513-742-2020.

To register for this exciting event, visit the ACGIH® website at

ACGIH® is a member-based organization that advances occupational and environmental health. ACGIH® is one of the industry's leading publications resources, with approximately 400 titles relative to occupational and environmental health and safety, including the renowned TLVs® and BEIs®. For more information, visit the ACGIH® website at or call our Customer Service Representatives at 513-742-2020.


Amy B. Bloomhuff, Esq., CAE
Associate Executive Director