Zach Ortwine stands at the forefront of the HVAC hygiene, performance, and duct remediation industries. With a career defined by technical excellence and industry advocacy, Zach brings an unmatched depth of expertise in mechanical hygiene, system optimization, and building performance diagnostics to the Building Science Advisors team.

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A recognized authority within the National Air Duct Cleaners Association (NADCA), Zach holds elite industry credentials including Certified Ventilation Inspector (CVI) and Air Systems Cleaning Specialist (ASCS). Beyond his field practice, he actively shapes industry standards, serving on the ASCS & CVI Exam Review Committee, the Scientific Committee, the Fall Tech Committee, and the HVAC Hygiene Publication Review Committee. Notably, Zach served as the Official NADCA Response Author addressing key research on negative air pressure and flexible duct integrity, and previously served on NADCA’s Leadership Committee.

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Zach’s commitment to measured, science-based performance earned his firm the prestigious 2024 National Comfort Institute (NCI) Contractor of the Year award (under $2M). Certified in commercial and residential air balancing, duct system optimization, and system performance certification, Zach specializes in the critical intersection where air distribution, hygiene, and airflow dynamics meet. His innovative work in duct restoration was featured as the main subject of an ACHR News article by David Richardson titled "Are Duct Cleaners the New Wave of Duct Renovators?"

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A highly sought-after speaker and educator, Zach has presented at major industry events—including the NCI Summit and the HVAC School Symposium on Ethical Duct Cleaning—and featured on top industry platforms such as the HVAC School Podcast, AC ServiceTech, and Corbett Lunsford’s Home Performance channel.