Understanding How UV Air Purifiers Work

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Clean, fresh air isn't reserved for a select few, and it's not just a necessity for homes where one or more occupants have breathing issues like asthma or allergies. Everyone should be able to enjoy safe indoor air.

If you're like most D.C. homeowners, you probably trust a medium-quality filter you buy at the hardware store to keep your indoor air clean. While these filters are better than nothing, they are far from the pinnacle of great indoor air quality devices.

There are a variety of exceptionally powerful indoor air purification solutions at a variety of price points. The team at Vito Services can incorporate things like HEPA filtration and polarized media filters into your existing HVAC, but some of these solutions may not fit your system and require special, expensive filters.

One of the more convenient and low-maintenance solutions for indoor air quality are UV-C lights. These lights are installed in your ductwork to destroy bacteria and mold spores while also eliminating a variety of VOCs from your indoor air.


A UV air purifier is a device that uses ultraviolet (UV) light to sanitize the air. These lights are installed within your ductwork, where it's isolated from view and exposure to people and pets. Silent and unseen, these lights treat the air as it's cycled through your home.


UV air purifiers use UV-C light, a type of ultraviolet light that's extremely effective at killing microorganisms. UV-C light destroys these microscopic invaders by damaging their DNA (sterilizing them), which prevents these microorganisms from reproducing.


  • Air Circulation

The journey begins when your HVAC system pulls in air from your home to either heat or cool it. Along with the air, it also draws in any floating particles in your indoor air, which could include dust, allergens and microorganisms.

  • UV Exposure

As the air moves through your home's ductwork, it passes by the UV air purifier. The UV-C light from the purifier shines onto the microorganisms in the air, breaking their DNA apart. This process neutralizes them, preventing them from causing any potential health problems.

  • Clean Air Release

Once the air is treated by the UV air purifier, it continues its journey through your HVAC system. It's then pushed back out into your home, but this time it's cleaner and healthier to breathe.


While UV air purifiers can't capture and remove physical particles like dust or pet dander, their ability to neutralize harmful microorganisms offers a unique set of benefits.


Many homeowners choose to combine UV-C systems with additional filtration options for more comprehensive indoor air pollutant removal. Each of these solutions excel at certain aspects of indoor air purification. For neutralizing harmful bacteria and viruses, it's hard to beat the subtle and invisible performance of properly installed UV-C air purifiers.


By keeping your HVAC system cleaner, UV air purifiers, combined with other indoor air quality filtration devices, can help improve the overall efficiency of your system and extend its lifespan. They can also prevent the growth of mold on your air conditioner's coil, a problem that could reduce your system's efficiency and lead to breakdowns and repairs (not to mention expensive mold remediation that's often not covered by insurance).


People are still on edge after COVID-19 – especially households with people who have immune deficiencies or conditions that make getting ill a serious health risk. Reducing the number of airborne pathogens in your home can help protect you and your family from those risks, making your home a truly safe place to be during cold and flu season or when there's a risk of airborne diseases.


If you're considering adding a UV air purifier to your HVAC system, the team at Vito Services is here to help. Our HVAC technicians in Rockville, MD, serving the greater D.C. area, are ready to answer all your questions and guide you through your indoor air quality equipment options.

Call us at 301-315-6100 for a consultation or HVAC services, including indoor air quality device repair and maintenance.

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