Ultraviolet light (UV) technology has been used since the early 1900’s to control pathogens, from disinfecting water to controlling airborne diseases in hospitals. More products are using UV lights as a tool for disinfection, from counter top water sterilizers to portable air purifiers. And recently, UV technology has caught on in the HVAC arena and is rapidly growing in popularity and use. With this growth in popularity, research institutes, government agencies, and trade groups are investigating and proving the merit of the use of ultraviolet light technology for indoor air applications. So, where do you start and how do you use these UV lights? First, consider ultraviolet lights as a preventative maintenance tool. Use UV in applications that repeatedly cause air handler mold growth or drain pan fowling. Placing the UV lights in proximity to mold and slime growth areas can eliminate pesky growth areas from occurring and reduce the maintenance and wear and tear of coil cleanings, system breakdowns, or drain pan overflow damage. A clean system will perform better and provide your customers better comfort levels.

Consider UV as a tool in hard to solve odor applications. Often, odor sources originate within the air handling system. Placing the UV lights in the ductwork or within the air handler can prevent the growth of the bacteria that causes these odors, such as ‘dirty sock syndrome’. Other sources of odors can be reduced or eliminated by UV as well, such as pet odors, cooking odors or household smells which tend to accumulate in a tightly closed home. When a UV light is used, the odor levels can be reduced each time the air re-circulating through the system comes into contact with the UV light. An odor free environment from products and services you offer can bring higher customer satisfaction with the work you perform.


The APCO system (Advanced Photocatalytic Oxidation) represents an entirely new type of air purifier. The combination of germicidal UV light and activated carbon cells inside APCO make it uniquely effective at reducing volatile organic compounds in the air without producing any harmful ozone. VOCs cause odors and include toxic chemical vapors like formaldehyde and toluene.

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