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.