Did you know that the United States is one of the least trained and certified HVAC industries in the modern world? Many countries require thousands of hours of training as well as completing a nationally recognized certification. Here in the United States it varies by state and even city. Here in my home state of Indiana there is no state-level HVAC license, but you are required as a landscaper.....let that sink in. Take 25 and check out this interesting perspective from Aidan Lucey, a journeyman refrigeration mechanic who understands apprenticeships of different continents.