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HVAC Education, Buying Tips, Indoor Air Quality, UV Lamps, Technology

Using UV Light to Kill Bacteria and Mold

There are three types of ultraviolet (UV) wave lengths, and although powerful, they cannot be seen by the human eye. UV-A is more commonly known as black light, UV-B comes from the sun, and UV-C can kill mold, bacteria, and mildew and is used to sterilize equipment in medical settings. Because of its disinfectant powers, a UV-C lamp can also be added to the indoor cooling coil of your HVAC system so that harmful contaminants are not circulated throughout your home.


How Does UV Light Kill Bacteria and Mold?

  • UV light sends out short wavelengths of energy that penetrate mold. By doing so, it breaks up the DNA inside to sterilize and eventually kill it.
  • To be effective in eliminating the contaminants, mold, bacteria, or mildew, it needs to be exposed directly to the UV-C light.
  • Installing a UV lamp as part of your HVAC system helps kill mold, bacteria, mildew, and other contaminants that flourish in a cool and wet environment, like the cooling coil in an air conditioning system.
  • Since UV light can be harmful to people, you should never look directly at the UV lamp while it’s operating.
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