Hello all, new to the forum, just wanted to say hi and ask for some info and feedback on a possible career choice. First I live in MA and I am a self employed carpenter. As you are all aware, the building industry is rather slow. I am thinking about going back to working for someone else in the maintenance field (either residential or commercial) and a lot of these places are looking for someone either HVAC or EPA certified. How involved is this? What kind of training/schooling is involved? How long do you have to be involved in the industry before taking the test? Thanks in advance.