After my previous incident with the air filter, I consistently opt to call an HVAC professional for any maintenance work. The other afternoon, the HVAC supplier that does routine maintenance on the HVAC component at toil gave us all cards because they had started offering apartment services such as repair, upgrade, & so much more; During that weekend, I decided to call them to have my smart HVAC worked on, then i also added that I wanted an air cleaner to improve indoor air quality. When I called the supplier, they confirmed their availability for Sunday afternoon the following week. When the doorbell rang on Sunday afternoon, I was sure it was from the supplier since I was not expecting anyone, and on opening the door, I saw an old classmate from junior high college. I was pleasantly surprised to see him, & after talking for a while, I asked how he had gotten my address. He told me he was the HVAC worker that I was expecting; After inspecting everything, including the a/c help, he told me that my DIY had gone wrong. The air duct would need duct cleaning. I also told him of my plans to buy a whole-apartment air cleaner, although he told me there was no need since I already had an air purification gadget to carry to my desired room. He also said that since he had worked on the system, the air quality in the dwelling would significantly improve, and my associate and I made plans to meet & catch up some more when my friend and I both had free time. It was exciting to take a trip down memory lane & cherish how life had changed & also reminisce on the good times.