Decided to become a little more pro-active in my career as an hvac service professional. Seen this site around for some time now and decided maybe I can pick up a few things here and maybe share some experience as well. I have recently made a big switch from 50/50 residential/commercial to 100% commercial!! yay!! no more slumlords and irresponsible homeowners to deal with. . .lol. now its just me. . . and extremely large roofs, sweltering sun, blistering cold and rainy windy days . I am interested in learning more about Trane Voyager RTU's with TRACER controls and maybe a little more REFER.