Charcoal Filter is the only way to breathe properly. We also use a UV fan and immediately noticed a difference when we first installed this product in our home. These filters need to be replaced more frequently due to the amount of kitchen odors, smoke from pizza baking, pets, even our stomach gases are now an ozone problem that creates greenhouse gases, not to mention the bad odors locked into that one investment. This can require a 3-4 month shift of three people in a 2300 sq ft house. We have two air conditioners which reduces the load but we love to cook and have two dogs. dogs fart. You want to smell and breathe your own gases, as well as toxins from faucets circulating through the system without this product. Your breath is fart gas, not to mention deadly carcinogenic gases, including radon, which are turned into natural gas every day without it. The hospital uses carbon filters with UV light disinfection methods. breathing is necessary.
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