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Arthur Bell

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".