What experts say about Regenerative Dual DuctTM/SM technology and Lentz Engineering:
'…uses far less active cooling resources than the traditional VAV system under all of the cases investigated, with VAV systems requiring up to 2.3 times the active cooling resource…' Dr. Stanley Mumma, Ph. D., PE, Fellow ASHRAE
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About Us

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Key Personnel
President Mark Lentz

Lentz Engineering Associates, Inc. is a skill-based mechanical engineering firm that specializes in high-performance, cost-effective HVAC system designs for educational facilities, commercial and industrial buildings, and laboratories. We are nationally recognized by the U.S. Department of Energy 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-Rise Residential Buildings, while meeting or exceeding the requirements of ANSI/ASHRAE Standard 62.1-2004, Ventalation for Acceptable Indoor Air Quality. The company developed the Regenerative Dual Duct TM/SM HVAC system featured in the PBS television program "The Future of Schools." The company also offers plumbing and fire protection design services, building commissioning, and forensic engineering services.

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