How much refrigerant does your air-conditioning unit leak annually?  What are the economic, performance, comfort and environmental impacts of leaks? How do you prevent leaks? What alternative and natural refrigerants are available which can reduce the environmental impacts of commercial air-conditioning units? Join us for a BIT Building Community Call on Friday, Aug. 28, from 2-3 p.m. EST to learn more from David Peavey, Owner, PV Heating & Air, and Southface Institute Technical Principal for Research, Hugh Magande.