HVAC Ultraviolet Germicidal Irradiation (UVGI) System.

          Viruses, bacteria, mold, spores, fungus, etc. can grow rampantly inside the damp and dark HVAC systems and get distributed all over the buildings through the air-conditioning systems, thus making your Indoor Environment infectious, unhealthy and unsafe to breathe. Research has shown that building occupants exposed to such unhealthy environment can develop health issues, including sinus, congestion, headaches, allergy, asthma, and upper respiratory ailments, along with colds and flu, commonly referred to as ‘Sick Building Syndrome'.

Visual Studio

UVGI system for Energy Savings and Healthy, Safe Indoor Air Quality


UVC rays of 254nm wavelength kill germs effectively without chemical cleaning, steam injections or other harsh methods. UVC rays disrupt the reproduction cycle of germs by attacking their DNA. It is a completely safe, environment-friendly and efficient way to remove mold and bacteria from coils and drain pan surfaces

Visual Studio UVGI Coil Installation
Visual Studio UVGI systems

The UVC Advantage

  • Eliminates up to 99.9% of mold spores and kills up to 87% of certain airborne bacteria passing through the air system
  • Maintains system efficiency and airflow, which saves money by not having to have your system coils cleaned as often
  • Increases productivity and helps reduce absenteeism due to illness
  • Highly recommended by many credible organizations like the US Government and the Air Institute of Respiratory Education, for killing microbes and improving Indoor Air Quality

Energy Saving due to Ever Clean Coils

UVGI Systems ensure deep cleaning of coils in the most eco-friendly & safe way. There is no worry of damage to coils, which can be possible with chemical and scrubbing methods.

UVGI Systems proactively remove the bio-films (layer of slimy, sticky substance that comprises the mixture of bacteria, mold, etc.), thus ensuring that the air does not get contaminated through the coil and drain pans.

Mold and bacteria built up on cooling coils reduce the space between the fins and increase the pressure drop through the coil, resulting in a higher operating cost of AHU fans. UVC rays from UVGI Systems eliminate the mold and bacteria on fins and provide greater savings on fan operation. UVC rays keep coils clean, which also means lesser coil maintenance.

The Connection Between HAIs, UVGI and HVAC

So what do building heating, ventilating and air conditioning systems (HVACs) have to do with HAIs? Many microorganisms that grow on air conditioning coils and in the drain pans have been implicated in HAIs. These include Aspergillus, Pseudomonas, Enterobacter and Acinetobacter.

Air handling systems in healthcare facilities are far more intricate than in standard office buildings because of the large number of air exchanges and complex humidity controls. There is also the need to minimize the risk of transmission of airborne microorganisms and preserve a clean environment for patients and staff. The proper use of ultraviolet germicidal irradiation in HVAC systems has been proven as an effective inactivation method for mold, bacteria and viruses, reducing the source of HAIs and a reduction of airborne microorganisms.1 A recent report published by ASHRAE2,3, and supported by ASHE, states that airborne transmission of diseases through HVAC systems is actually much more prevalent than previously thought. ASHRAE cites UVC as one of the control strategies that may help avoid transmission.

Germicidal UVGI systems are designed to implement the ASHRAE- suggested general strategy for the use of UVC for surface and airstream decontamination. The high output UVGI is a powerful tool for reducing the spread of contaminants at the source – the HVAC coils and drain pans.

  • 1. P Brickner, et. al., “The Application of Ultraviolet Germicidal Irradiation to Control Transmission of Airborne Disease: Bioterrorism Countermeasure.” Public Health Report, 2003 Mar-Apr;118(2):99-114.
  • 2. ASHRAE, “Airborne Infectious Diseases,” ASHRAE, Atlanta June 24, 2009.
  • 3. ASHRAE, “Ultraviolet Lamp Systems,” ASHRAE Handbook: Heating and Air-Conditioning Systems Equipment.