Hi, I got my Master degree last December.I came to U.S. August, 2003. For my degree here, I just doing some research on Photocatalytic Oxidation(PCO) technology to decompose indoor contaminant. But there is so few opportunities in this field(PCO), I have no work experiece before. I want to find a job about HVAC design, this is my BS major in my homecountry. In U.S., the methods must be a little different, I try to search some HVAC drawings online, but I can't find it. Can anyone give me some advice that where can I get some HVAC designs examples online or some books?? Thank you so much!