I happen to be a professional cleaner.
I go to all kinds of residences and take care of all their cleaning needs. Typically, the busiest time of the year is during the spring when most people want to take care of their spring cleaning. Oftentimes, I will deal with poor air quality and a great deal of dust. I always tell people that they should invest in a proper air purification system. I also make sure they keep their air filters up to date so that I don’t have to suffer when I am cleaning the homes. There was this one house that was extremely bad with the air quality. When I checked the air filter, I felt like I was going to throw up. There was so much gunk on that thing, it was really nasty. It smelled really bad too. I knew there was a problem when the A/C was on and the smell wasn’t so nice coming from the HVAC vents. I told these people that they better have their ductwork cleaned out or I wasn’t going to be doing any cleaning work in that house. They tried to get some other cleaners to take care of the cleaning instead, but nobody else wanted to take the job either with such horrible air quality. They ended up listening and got their ductwork cleaned, a new air filter, and they even installed a nice air purification system. I was glad that they did it, and even they were happier now that they had better air quality. Hey, it’s something that is good for your health, so everybody should be doing this.