Some HEPA air cleaners and air purifiers include ultraviolet light systems that allow them to kill mold spores, bacteria and viruses. These HEPA air cleaners are wonderful for people with mold or bacteria problems in their home or office. HEPA air cleaners with ultraviolet light systems are also important for people with mold allergies, immune system problems or people going through chemotherapy or organ transplants that cannot be exposed to viruses or bacteria. When searching for a HEPA air cleaner with an ultraviolet light system, It is important that the ultraviolet bulbs are non- ozone producing as ozone can be an irritant to those that have asthma or other lung conditions.

Also the ultraviolet lights should be pointing into the HEPA filter 's intake side so they can kill any mold spores, bacteria and viruses on the HEPA filter 's intake surface before they can penetrate into the filter. It is almost worthless to have an air cleaner where the ultraviolet lights are pointing to the outside diameter of the HEPA filter because the filter may already be contaminated into its core. The only HEPA air cleaner to date on the market with the proper {Patented} ultraviolet design system is called the TRACS. TRACS stands for Total-Room-Air-Cleaning-System.

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