Vigilent President and CTO Clifford Federspiel Named a 2021 Environment+Energy Leader

December 9, 2021

Developed the NIADE metric to quantify Covid-19 risk in occupied spaces

logoOakland, CA – December 9, 2021 – Vigilent, the leading provider of Dynamic Cooling Management™ systems, today announced that its President and CTO Clifford Federspiel was named to the 2021 Environment+Energy Leader 100.

During the Covid-19 pandemic, Dr. Federspiel developed the Non-Infectious Air Delivery Equivalent (NIADE) metric, which is being used by commercial and institutional facilities to address airborne infection risk. NIADE quantifies airborne Covid-19 risk in occupied spaces. It can also be used to assess risk in future pandemics, including annual influenza seasons.

“I am honored to be named as an Environment+Energy leader,” said Dr. Federspiel. “It is especially rewarding that my work in HVAC control can now be applied to help mitigate airborne infections in buildings. A metric like NIADE is necessary to understand infection risk and what actions can be taken to minimize those risks.”

“The honorees on the annual list show groundbreaking work and dedication to the field of sustainability and energy management,” said Paul Nastu, President of Environment+Energy Leader. “We’re thrilled to recognize this year’s Honorees and congratulate all who made the list.”

Dr. Federspiel is a leader and visionary in the field of environmental and energy management, having authored more than 50 papers on topics ranging from HVAC control to cooling optimization. He is the recipient of the Ralph G. Nevins Physiology and Human Environment Award from ASHRAE, and holds numerous patents in the field. 

Now in its fifth year, the annual Environment+Energy Leader 100 recognizes those environment and energy “doers” who break trail in creating new solutions, programs, platforms, best practices and products to help their companies – or other companies – achieve greater success in commercial and industrial environment and energy management. Nominations for the E+E 100 are made by Environment+Energy Leader readers and others that work in the industry, vetted, and then selected by a group of industry advisors. See this year’s honorees:

About Environment+Energy Leader
For fifteen years, Environment+Energy Leader ( has provided news, best practices and research that has influenced environment, energy and sustainability conversations–and powered decision-making. We have a wide range of professional resources, including our website, newsletters, awards programs, webinars, reports, white papers and conferences to help you tackle environment and energy management challenges in order to reduce costs, increase efficiency and minimize resource waste. Environment+Energy Leader is published by Business Sector Media LLC.

About Vigilent
Vigilent is pioneering the use of IoT and artificial intelligence to deliver dynamic cooling management in mission-critical environments. Vigilent increases reliability, unlocks stranded capacity, and reduces operating costs in hundreds of data center and telecom facilities worldwide. Our mission is to increase the profitability of our customers and create a more sustainable planet.