HVAC system components contribute more to the outcome of a construction project than ever before. For decades, HVAC system components have been specified for the benefit of occupants, to provide air for breathing, and to manage comfort. In the past decade, projects have increasingly required stringent new energy-recovery rates, electrical consumption limits, and ventilation strategies, for the benefit of the planet, to reduce energy consumption and carbon emissions. This session will discuss green building certification programs and how HVAC system components can influence the building carbon lifecycle and minimize occupant exposure to hazardous product ingredients.