Architecture

Arthur A. Bell, Jr., PE (Monaca, PA) is a registered professional engineer with more than 28 years' experience designing HVAC systems. He is the author of "HVAC Design Portfolio".W. Larsen Angel, P.E., LEED-AP (Elkridge, MD) is a principal in the MEP consulting engineering firm of Green Building Energy Engineers. He is the author of "HVAC Design Sourcebook".