UV Lighting

In 2012, Researchers at Duke University Medical Center used ultraviolet radiation (UV-C) to nearly eliminate drug-resistant bacteria in 50 hospital rooms, reducing the number of bacteria by more than 97%.

Benefits HVAC UV lights:

  • Control mold and bacteria
  • Reduce colds and flus – germs are not re-circulated by HVAC system
  • Reduce smells / odors
  • Remove VOCs
  • Are more effective in humid climates than dry climates
  • Reduces clogging in condensate drain lines by preventing algae growth.
  • Maintain a cleaner coil, improving cooling efficiency and reducing electricity costs.

Types of HVAC UV Lights

There are two types of UV lights for HAVC systems.

  1. Coil Sterilization – A “stick type” light installed inside the return air duct near that sterilizes the air handler coil. A coil sterilization UV light runs 24/7 and is the most common type of HVAC UV light. It is also most reasonably priced.
  2. Air Sterilization – A complete UV light unit that sterilizes moving air. The UV light unit is installed in the return air duct and cycles on with the air handler blower.


The TopTech UV stick light bulb is estimated to last 9000 hours, just over 1 year. Replace the bulb during each annual HVAC service and maintenance is nearly effortless.

Energy Cost

The TopTech UV light we installed is rated at 1.1 amps. To calculate annual energy costs, I used these handy calculators:

Convert Amps to Watts – 24v AC at 1.1 Amps = 26.4 Watts
Convert Watts to Electricity Cost – 26.4 Watts * 24 hours/day * 10.5 cents kWh = $24.28 per year ($2.00 per month)