... filter's contamination. Such filter monitors, especially for activated carbon filter, are quite complicated, and id installed, could ... remove specific chemicals, including: halogenated organics, pesticides, formaldehyde, ammonia, carbon monoxide, radon, mercury vapor, PCBs, sulfur oxides, VOCs, etc. ... produce Ozone as a by-product. Ozone is a gas pollutants that can cause lung irritation, watering eyes, ...