Dr. Nadia Sabeh is the President and Founder of Dr. Greenhouse, Inc., an agricultural and mechanical engineering firm that specializes in the design of HVAC systems for indoor plant environments. Dr. Sabeh has her PhD in Agricultural Engineering from the University of Arizona’s Controlled Environment Agriculture Center (CEAC) and is a licensed Mechanical Engineer in the State of California. For over 20 years, she has dedicated her education and career to helping farmers control their environments, allowing them to grow crops indoors, in greenhouses and in facilities that would otherwise be impossible or impractical to do so. 

Nadia has a free VPD app for both iPhone and Android as well as an amazing podcast called "The Doctor is in" that's available on all streaming platforms. https://www.doctorgreenhouse.com/podcast/tag/podcast