Homeowners concerned with poor indoor air quality may have a variety of pollutants to deal with. There’s no “one size fits all” solution to dealing with these pollutants; that’s why there are a variety of air cleaning solutions on the market. UV lights, for instance, are designed to treat biological contaminants such as mold, mildew, fungus, and bacteria. Also known as ultraviolet germicidal irradiation, UV lights have demonstrated success in controlling these organisms.

How Ultraviolet Lights Work

UVGI works by targeting the DNA of an organism so that it can’t reproduce. The longer the exposure to UV light, the more damage that occurs. Not visible to the eye, ultraviolet light is a type of electromagnetic radiation that can break chemical bonds, resulting in ionization and allowing electrons to escape from atoms. The atoms in turn form or break chemical bonds, a process that may damage skin and eyes, but that is also an effective way to sterilize.

UV Lights and HVAC

Condensation can build up inside an HVAC system, resulting in excess moisture and providing a perfect haven for mold, mildew, fungus, and bacteria. Installation of UVGI lights near the air conditioner’s evaporator coil and in the ductwork can help treat the air as it is drawn through the system. Mold spores and other airborne particulates that might have been re-circulated through the home’s air are targeted and destroyed by the UV light.

UV bulbs will last a long time but should be replaced every couple of years to be effective.

Benefits of UVGI 

Airborne particulates from mold, fungus, bacteria, and volatile organic compounds (VOCs) can aggravate respiratory problems, including asthma, bronchitis, and emphysema, and can exacerbate allergies. Installing UV lights in the HVAC system adds an effective layer of protection against these pollutants.

In addition, UVGI can help reduce bad odors from the HVAC system and reduce clogging in the condensate drain caused by algae growth. By preventing algae growth on the coil, efficiency of the entire system is maintained.

For more on UV lights, contact Wolff Mechanical. We’ve served Phoenix and central Arizona for more than 25 years.

Our goal is to help educate our customers in the Phoenix Valley area of Arizona about energy and home comfort issues (specific to HVAC systems).

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