HVACR. Heating, Ventilation, Air Conditioning, and Refrigeration. I was 12 years old when I first installed a compressor on a refrigerator for my father. I'd been going on jobs with him for years already and have been doing it ever since. 40 years and still love my job. He's been doing it for 55 years and we'll talk about work for hours to this day. He always told me choose a job that you like and can make a living cause that's where you spend most of your time. My son is 22 and went on his first job at 6 months old. I was supposed to be babysitting and had a factory down so I handed him to the customer while I sorted out the problem. He now is 3rd generation HVACR guy by his own choice. 1st job is firefighter and HVACR on the side.