How Do UV Lights for HVAC Systems Work?

When you hear the phrase ultraviolet light, you might picture getting sunburned after spending a day at the pool. Having said that, UV light is also a strategy for increasing indoor air quality. Sunscreen safeguards against UVA and UVB rays, but UVC is the kind of light found in air purification. If you suffer from allergies or asthma or would like to limit the distribution of illnesses throughout your home, a UV light installed in your HVAC system could be the air quality solution you’ve been hoping for!

How Does a UV Light Function?

The germicidal influences of ultraviolet light have been known for more than 100 years. UVC rays were originally applied to treat tuberculosis. Nowadays, germicidal lamps are common in hospitals, food processing plants, water treatment plants and air purification equipment. A UV lamp added to your HVAC system improves the air quality in your home by wiping out microorganisms including bacteria, viruses, mold and more. It only needs 10 seconds of contact to deactivate these germs’ DNA, killing them or blocking them from replicating. UV lights also combat volatile organic compounds (VOCs) present in cleaners and repellents on top of airborne bioaerosols like pollen and pet dander. Still, UV lights don’t physically ‘trap’ contaminants, so you still require an air filtration system to extract dust, fibers and other particles from your indoor air.

How Effective Are UV Lights?

As long as they are installed correctly and utilize the right wavelength of UV light, germicidal lamps are highly effective at improving indoor air quality. One study from Duke University illustrated that UV light deactivated more than 97 percent of drug-resistant bacteria from the air in hospital rooms. Another analysis revealed “significantly lower” fungal levels in a commercial building’s HVAC unit after four months of applying a UV light.

Benefits of UV Lights

Add an ultraviolet lamp in your HVAC system to take advantage of these benefits:
    • Cleaner indoor air: UV light technology helps clean the air 24 hours a day without introducing chemicals into the environment. Unlike other air purifiers, ultraviolet lamps don’t generate ozone, a recognized lung irritant that is harmful to individuals with asthma, allergies or chronic lung diseases.
    • Decreased chance of getting sick: When combined with good personal hygiene, germ-killing UV lights can reduce the risk of contracting viral and bacterial infections.
    • Stronger protection for your HVAC system: Mold, fungi and bacteria can gunk up your heating and cooling equipment. Keep the system running reliably and efficiently with a quality UV light.
    • Smaller HVAC maintenance and repair bills: With an inherently cleaner central HVAC system, you enjoy lower maintenance requirements and fewer emergency repairs. These savings can help offset the cost of utilizing a UV light and replacing the bulb.

Where Do UV Lights Get Installed?

If you choose an air-sanitizing UV light, your installer will position it inside your ductwork near the HVAC system. There, the lamp sanitizes the air before it flows through your home. If you would rather have a coil-sanitizing UV light, it should sit around the AC evaporator coil. There, it targets mold and bacteria that grow on the damp coil, keeping your system clean and operating smoothly.

Are UV Lights Safe?

The sun continually emits invisible UV radiation. As you probably know, UVA and UVB rays can burn your skin, so it’s crucial to use an effective sunscreen when enjoying time outdoors. The sun also produces UVC rays, the most harming form of solar radiation capable of killing microorganisms and irritating other living tissue, particularly the skin and eyes. Luckily, the atmosphere eliminates these rays altogether, so they don’t reach the earth’s surface. With the knowledge that UVC rays are harmful, why should you feel comfortable installing a UVC light in your HVAC system? It’s simple—the light is confined to your ductwork where you never come in contact with it, so it creates no risk to you and your family. When the time comes to maintain the lamp or replace the bulb, your HVAC technician will turn off the system for a short time to prevent exposure to the damaging light.

How Long Do UV Lights Last?

UV lights are on continuously and generally last nine to 14 months. Yearly HVAC maintenance (once in the spring for your air conditioner and again in the fall for your furnace) is the perfect time to have these bulbs examined and replaced as needed.

Schedule UV Light Installation

A1 Chesney Service Experts features a range of air quality solutions, including UV lights for HVAC systems. We would be delighted to analyze your home and your family’s needs to suggest the products that will perform best for you. Rest assured that all work we perform is backed by a one-year 100% satisfaction guarantee. Get in touch with your local A1 Chesney Service Experts office to schedule UV light installation or request a free home health consultation today.

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