This month, HPAC 'On The Air' welcomes back Dr. Bill Bahnfleth, ASHRAE past president, former chair of its ASHRAE Epidemic Task Force, and longtime professor of architectural engineering at Penn State University. Bahnfleth's father Donald also served as editor of HPAC Engineering throughout the 1960s, and later became ASHRAE president, himself. So there is much to unpack in this wide-ranging episode...