I’ve 7 years’ experience as hvac installer and I’d like to take the plunge and become a lagger. I was always under the impression that you could do this without further formal training since I’ve been working in the AC field for so long. I’ve recently been told that this is not the case and that I have to take some specific courses. Is this the case? The fact is that this reduces my possibilities a lot. Giving up work in order to study is not an option for me at the moment because I need the cash and also I have a family and I don’t want to miss time with them nor neglect them. Has anybody been in my situation themselves and can give me some advice? Highly appreciated!