Howdy, New member been in the trade for about ten years. Mostly Residential and Light Commercial Install/Maintenance/Service. EPA-608 Universal. I have worked in a few of these great United States and have been exposed to a little bit of everything. Its nice to have found a virtual community (of which I am proud to say is the only one I now belong to - despite this digital age) of like minded folks with an attention specifically to doing things correctly and helping to spread the knowledge of the trade.