I tested all the services myself.
I remember a time when I was in a dark place mentally, I barely left the home for 6 or 7 months, but with the help of my parents plus a friend, I crawled out of it.
I started with trying a few things with the central HVAC system to improve air quality plus to keep me busy. I had created an air conditioner care program for my folks plus our neighbor, who occasionally let me task on his HVAC system for a small fee. I checked all the AC filters plus found it needed updatement because it was filthy. I advocated for a HEPA filter because 1 of them had a dust flu symptom. When I moved back home, I used some of my spare time to learn about commercial A/C, plus I found it easy to understand things such as repairs plus anything else to do with a digital control unit. I did not explore it further. I used this expertise to task on my parents’ air conditioning. At some point, I had to call an A/C worker for ductwork cleaning because I did not have the right tools for it. The cooling expert was impressed by the repair I had done plus asked if I had ever worked for an A/C corporation. I told him I had never worked for 1 plus had gathered the expertise online because I had a lot of spare time. From how the A/C professional maintained the electric heat pump, I could tell he offered nothing short of top quality AC service. The best thing that came out of it was that the tech showed me a slot as an apprentice, which should not be more than more than one months since I had an eye for it, plus then after, they would offer me work.