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Mark Lentz P.E.

Lentz is president of Lentz Engineering Associates (Sheboygan Falls, WI). He is a graduate of the University of Wisconsin, Madison, with a Bachelor of Science in Mechanical Engineering, and a frequent Speaker at ASHRAE Annual and Winter Meetings and has been very active with respect to ANSI/ASHRAE Standard 62.1. He is a member or corresponding member of six ASHRAE Technical Committees, and has served as chairman of ASHRAE Technical Committee TC 9.8- Large Building Air Conditioning Applications, and vice chairman of ASHRAE TC 5.7-Evaporative Cooling. He has been nationally recognized by the DOE for having successfully developed, tested, and proven several advanced HVAC system strategies designed to exceed the performance requirements of ANSI/ASHRAE/IESNA Standard 90.1 - Energy Standard for Buildings Except Low-Rose Residential Buildings, while meeting or exceeding the requirements of and ANSI/ASHRAE Standard 62.1 - 2004, Ventilation for Acceptable Indoor air Quality.

ARTICLES

VAV Systems and Green Design - Part 2

March 1, 2008
In the conclusion of this pair of articles, the author delivers opinion and documentation with equal force. Making the argument that traditional VAV is too troublesome regarding meeting ASHRAE 62.1 and 90.1, he also explains how those same standards are pushing designers in the right direction. The destination? A new era for VAV and new efficiencies for their applications - but shining a little light down this path reveals just how fraught with peril the designer’s journey can be.

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VAV Systems and Green Design - Part 1

January 1, 2008
In this forthright first installment, the author makes the argument that VAV as practiced for the last 50 years has become not only outdated but unable to keep up with the standards that are supposed to guide it. On the upside, circumstances point the way toward a revitalized, high-efficiency era for VAV. But first, let’s take stock of the status quo.

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How to Calculate Backup Power Supply Requirements for Your Facility

On-Demand This webinar reviews how to determine power requirements of facility loads; electrical characteristics and impact of different types of loads such as large motors and UPS systems on power supply sizing; acceptable power sources and other constraints applied by building codes; and how software tools can be used to simplify the process of calculating backup power requirements.  

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Engineered Systems Magazine

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2014 April

Check out the April 2014 issue of Engineered Systems, with features on backup power supply requirements, cyberattacks, and much more!

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Design Flaws

Following up on Howard McKew's April "Tomorrow's Environment" column: Have you ever thought twice about reporting problems with another firm's design? What did you do?
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THE ENGINEERED SYSTEMS STORE

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The Green Energy Management Book

Learn from our experts how to evaluate job opportunities, market your services, sell a Walk-through Survey, target areas for an Energy Audit, calculate energy savings, do retrofit work, and win continuing contracts for retrofit work.

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Tomorrow's Environment Podcast

This series from longtime columnist and chronic forward-thinker Howard McKew covers a lot of ground -- from retrocommissioning to systems training, on toward checklists for drawings and tips for meeting minutes. Click HERE to be taken to the podcast page!

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