There was a long phase of time when I thought I was sick. I kept coughing, sneezing, & just feeling angry. I would try to sleep it off but it never seemed to go away. That was until I stepped outside for various reasons. I began to realize that the fresh air was doing myself and others good. I even felt better when I was at work than when I was at home. I went to a dentist about our concerns once & the dentist asked myself and others about our Heating & Air Conditioning equipment. He asked if I was adjusting our air filters & if I used an whole-house air purifier at all. I never used whole-house air purifiers & I admittedly didn’t change the air filters entirely often. I would wait until they absolutely looked dirty to me. I didn’t realize until later that it’s not always simple to see that an air filter is clogged because of all those microscopic contaminants. They do obstruct the flow of air with your Heating & Air Conditioning proposal though & they will cause the Heating & Air Conditioning proposal to struggle. My Heating & Air Conditioning indeed was struggling, but it never died on me. I should have noticed that after I changed the air filter, the Heating & Air Conditioning would run more smoothly & the air quality would improve to some degree. Well, I ended up having our HVAC duct cleaned, a new air purification proposal installed, & I used better air filters. I also changed them on time as per the directions. I was hastily feeling way better & I no longer felt sick inside our home any longer. I wish I would have kept on top of air filter fluctuations & HVAC duct cleaning before. Also, the air purification proposal has worked like a dream & I couldn’t imagine not using it anymore.