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HVAC UV Lights
How does UV light kill germs?
UV-C light (the frequency used in germicidal UV lights) kills germs by distrupting their DNA which prevents them from reproducing, effectively killing them. In nature this frequency of light is filtered out by the Earth's atmosphere so microbes have no defense against it.
Is UV light safe for children and pets?
When a UV light system is installed in a central air system the germ killing effect takes place inside the air system and is limited to that area. There is no danger to any living thing in the home except microbes that are carried by the air into the central air system.
Is it OK to look at the UV light?
Never look at the UV lgiht when it is lit. UV-C light can give your eyes a painful "sunburn". Unplug or disconnect the unit to work on it.
Our air system isn't running so why is the UV light still on?
Mold and other boilogical contaminants will grow inside the air handler whether or not its running. Constant exposure to UV-C light keeps the air system clean.
Can I upgrade my Blue-Tube UV with a different lamp?
Yes! All Blue-Tube and Fresh-Aire UV AHU lamps are interchangeable. When it's time to replace your UV lamp you have 4 options to select from: 1 Year, 2 Year, 1 Year Odor Control, and 2 Year Odor Control.
My '1 Year' UV light still glows after 2 years - do I need to replace it?
Yes, Over time the UV effectivness of the lamps decreases even though the lamp may still be putting out visible light. '1 Year' and '2 Year' lamp designations refer to effective UV output not when the lamp will burn out.
Will a UV light system kill mold in the walls?
No. UV-C germicidal irradiation can only kill microbes on surfaces that the light shines on directly (surface kill) or that pass by in the air stream (airborne kill).