a tall building in a city

The Reliable
Blog

UV Light for HVAC: Do they Work?


UV Light for HVAC: Do they Work?

Germicidal or UV lights for HVAC systems are used to kill the DNA of germs, viruses, mold spores, bacteria and fungi as they pass through the air handler system.

A strategically placed UV light is very effective at killing close to one hundred percent of these harmful pollutants. Installing a UV HVAC system in your condensing unit — the air handler — provides a cost-effective method to clean all the air as it passes through the system.

How Do They Work?

UV lights for HVAC systems are designed to use a particular wavelength of light — 254 nanometers — that is absorbed by the DNA of microorganisms. After exposure to the UV light, the organisms are unable to produce the proteins they need to survive. Although the UV light does not kill the germs immediately, it nullifies their ability to cause harm and shortens their life span considerably.

Why Install a UV Light in the HVAC System?

The volume of air inside your home is immense. Treating it effectively as a whole is nearly impossible because UV lights can also be harmful to humans. Inside your air handler, however, is a different story. Your HVAC system draws the air into its evaporator unit and forces it out through air registers — the vents — placed around your home. Installing the UV light inside your evaporator unit makes perfect sense, as the air must pass over the UV light as it is circulated.

What Are the Limits of UV Lights?

UV lights for your HVAC will not alleviate your symptoms caused by allergens, since dust as well as dead fungi will still be present. Also, if your HVAC system has damaged or leaky ducts, the vacuum created in the ducts could draw in new contaminates from attics and crawl spaces, limiting the UV light effectiveness. The UV light is only effective when microorganisms contact its light spectrum. Any of the aforementioned contaminates shielded from its light spectrum will survive.

How Is It Installed?

A professional air conditioning technician should handle the installation of UV lighting inside the evaporating unit of your home. The light must be wired to the HVAC evaporating unit so it activates only when the system is in operation. Before installing the equipment, the technician should clean the air handler system thoroughly and inspect the ductwork for leaks. This will provide optimum conditions for the UV light system.

Energy-efficient homes are constructed today with an emphasis on sealing every crack and crevice to prevent conditioned air from escaping. Unfortunately, this has created the perfect environment for these microorganisms to thrive. Installing a UV lights for HVAC systems helps to control or even eliminate these harmful contaminates.

Residents of Woodstock and beyond seeking additional information regarding UV lights for HVAC systems can contact Reliable Heating & Air.

Reliable has provided outstanding customer care and support for more than 35 years. Reliable's highly trained technicians are capable of providing all of your heating and air conditioning needs.