In this episode of The Protopod, we sit down with David Hagan, founder and CEO of QuantAQ, the company transforming air quality monitoring with high-accuracy, Internet-connected instruments designed to be affordable, scalable, and reliable. David shares how he launched QuantAQ straight out of his MIT PhD, why starting with scientific rigor sets his team apart, and how rapid iteration has fueled their growth from prototype to production—even through supply chain turmoil. We explore the future of air quality data, what’s still missing from today’s monitoring landscape, and how better, faster, real-time information could reshape everything from building operations to public health policy. A must-listen for anyone interested in hardware startups, environmental technology, or building complex products at high velocity.