Installing a UV light in the return air duct is a great way to sterilize the air controller coil. Depending on your needs and the system you choose, you can install the UV lights directly on the air controller, in the air return system, or in strategic areas along the ducts. For optimal results, place the UV lights around reflective surfaces and use high-efficiency filters. The air controller is usually the best place to install a UV light. This allows the light to reach the air as it enters the system.
However, it's important to remember that UV light is like the Sun and can damage your eyes if you look directly at it. Two studies have shown that UV light is effective at eliminating mold and bacteria, one in hospitals and one in a commercial HVAC system. If you're interested in both types of UV light, consider starting with a coil sterilizer and then installing an air sterilizer when you see the results. It's important to note that it doesn't make sense to install an HVAC UV lamp unless you've followed indoor air quality priorities. UV (ultraviolet) light is at the lower end of the wavelength spectrum of light and is electromagnetic radiation. An example of a UV light is the Amazon REKO Lighting R2000 air purifier, UVC UV light for the whole house, in a duct for HVAC (air conditioning).
To ensure that the UV light only shines on the coil and not on the filter, install some kind of “shield” or metal reflector between them. According to an Engineered Air technician, HVAC UV lights are very effective at controlling mold inside the air controller. HVAC UV lights are an effective means of improving indoor air quality, but only after following indoor air quality priorities. Depending on your personal and household needs, each type of UV lamp offers sterilization benefits that can reduce maintenance activities and repair work. When installing a UV light in your return ducts, it's important to consider your specific needs. If you're looking for a way to reduce mold and bacteria in your home or business, then installing a UV light is a great option.
However, it's important to remember that this type of lighting should only be used after following indoor air quality priorities. Additionally, make sure to install any shields or metal reflectors between the filter and coil to ensure that only the coil is exposed to the UV light.
