Summer Heat Wave Before AC: History of Air-Conditioning http://www.time.com/time/nation/article/0,8599,2003081,00.html Gorrie's Fridge http://www.phys.ufl.edu/~ihas/gorrie/fridge.htm John Gorrie Museum State Park http://www.floridastateparks.org/johngorriemuseum/default.cfm HowStuffWorks: How Air Conditioners Work http://home.howstuffworks.com/ac.htm The Writings of Benjamin...

Engineers at Pennsylvania State University have devised an air conditioning system that is more efficient than current standards and is highly resistant to dangerous airborne microbes such as anthrax. Because the Dedicated Outdoor Air System (DOAS) does not use recirculated air, a letter contaminated with anthrax would not spread throughout the building. A detailed technical overview of the...