My son is area of a group of high university seniors participating in a six month house building boot camp; It’s a way for teens to learn all about the nuts & bolts of building a home, and the method is that the students have exposure to skill sets that could become a profession, as well as knowledge that will help them as future house clients. The kids learn to frame, shingle, tile & plaster. They also get to shadow electricians, plumbers & heating & cooling techs. My son enjoys the program. It’s captured his imagination in a way only video games have in the past! He says he enjoys finally working with the tradesmen the most. He asks a lot of questions about our home now. I’ve even caught him with a flashlight looking around the utility room in the basement. He’s considering an apprenticeship with an established Heating, Ventilation, & A/C business after graduation. It would entail cleaning gas furnaces, servicing air conditioner units & assisting with the installation of air cleaners. He would also need to take an Heating, Ventilation, & A/C certification course at the community university at some point, however one piece of equipment he’s reading about now at the boot camp is the heat exchanger. My son explained to me that heat exchangers work on both the heating & the cooling of a home, which was news to me. He then said, with great confidence, that a heat exchanger transfers thermal energy from one medium to another. I’ve never heard my child talk about anything so knowledgeably. He said that the less energy needed to cool or heat a building, means a more energy efficient Heating, Ventilation, & A/C system. Heat exchangers do the heavy lifting for you. I am thrilled my son is so interested in something that could become a job for him.