 everyone thinks just putting in a filter in your furnace every three months is the key. Let me tell you something, you can't put a new filter in your furnace enough, as far as I'm concerned. Put one in every month. We waste money on coffee, hot dogs, and crap at the fast food restaurants. We need to look more into our family's health inside a home, especially today. Why? The last three years, what have we had? COVID. Oh man, COVID. Talk about a pandemic, and this is the beginning of a change in our lives that we've never seen before. This means this is going to continue. The one thing I'm bothered by right now is that we're not really seeing anything changing in code when it comes to a healthy home.