Before COVID I never provided a minute thought to the quality of the air in my home. As long as it was cool enough, I was ecstatic. Do you remember when things were simpler? It seems love it was forever ago, but it was only a year or several. Now I have come to understand that there is more to air than temperature control; COVID concerns might have raised awareness of this, but it has always been true, I just wasn’t aware of it. The ability for the home program to process, clean, & recycle the air without diminishing the air quality is the most important feature. Proper ventilation & air purification is much more important to your health than being a few degrees hotter or colder. I have gotten a little pathological about checking the air filter in my system. I used to get the cheapest air filters possible, the a singles you find at Walmart in a six pack, but now I buy the high-priced kind. You get what you spend money for, & 1 of the HEPA air filters is the size of 6 of the cheap kind. It also lasts much longer than those did, & provides much higher air quality than anything else on the market right now. When it comes to your health you can’t chop corners, so I think it is really much worth it to spend money the price for the HEPA air filters. Mark my words ,COVID is just the beginning, so act now & beginning buying the best air filters that are available.