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Ultraviolet Germicidal Irradiation

Presenting Stereo UV with the proven result as per ASHRAE GUIDELINES to keep your office environment safe during the pandemic. It destroys harmful Microbes, Bacteria, and Viruses in the air through UV Energy. Please get in touch for more info on the same. Stay Safe & Take care!
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In today’s world Indoor Air Quality has become an essential factor as it has a direct effect on the health and well-being of its occupants. For the overall health and well-being of building occupants, it is essential that a building must be well ventilated and the inside air must be free of microorganisms (Virus, Bacteria & Fungi).

UVGI Technology (Ultraviolet Germicidal Irradiation) has been in application for so long for improving air quality as It improves occupant health, comfort, and productivity. Since the SARS outbreak the role of air-conditioning and ventilation, in preventing airborne infections has drawn extensive attention.

Ultraviolet Germicidal Irradiation (UVGI) is an effective method of air and surface disinfection when integrated with the HVAC system of the building. It utilises ultraviolet (UV) light to deactivate the Virus by disrupting and destroying its DNA so they are unable to perform its vital cellular functions and ultimately gets killed.

With the prolonged usage of the HVAC system, fungus growth starts inside all corners and joints of the ducts, which subsequently becomes a breeding ground for different kinds of bacteria and viruses. The regular deposit of microorganisms in the ducts and on the surface of the coil of AHU should be cleaned for a healthier environment.

For the internal cleaning of the HVAC system, UVGI can be used as a safe alternative to manual or chemical cleaning. As manual cleaning is unmanageable & inconvenient and may cause damage to the coils. Chemical cleaning leaves the chemical residues inside the ducts and coils of AHU which slowly come out in the form of minute droplets and vapors when the system is in running condition causing the occupants to inhale the same.

Application of UVGI

The UVGI units can be easily installed inside the AHU & Ducts. In the case of AHU, the UVGI is installed near the coil surface so that the coil remains free of viruses and other harmful microorganisms. In the case of Duct based system, the UVGI units are installed inside the ducts. For the area which does not have the access to Centralized Air Conditioning systems, we offer standalone units to perform disinfection functions.


Several international studies and research has proved the effectiveness of UVGI as the technology is in use since 1930. With the advent of COVID-19, UV lamps are effectively used for air and surface disinfection. Inside any building premises, the air is circulated through HVAC so it is essential to have active UV lamps integrated inside the AHU & the Ducts to ensure that there is no air contamination and the occupants of the building remain healthy.

Ultra-violet (UV) energy destroys microorganisms (Viruses, Bacteria, Fungi, etc.) by attacking the DNA of the microorganism, it penetrates deep inside the cell membrane, breaking the DNA structure of the micro-organism and making it not reproduce any further. Hence, the UVGI system inhibits the growth of any sort of microorganisms inside the duct lining or on the coil surface for the health of building occupants.

Low-pressure mercury vapor lamps discharge about 95% of their energy at a wavelength of 253.7nm, which is close to the DNA absorption peak (260–265nm) which inactivates micro-organisms by disrupting the nucleic acids and proteins structures at the molecular level, making them incapable of reproducing. DNA ( Deoxyribonucleic acid ) is essential for the growth and replication of any viruses and other infectious microorganisms. UV lamps irradiate UV photons that can damage DNA in a variety of ways, resulting in the micro organism’s inability to replicate or is no longer capable of causing disease. The effectiveness of UVGI units primarily depends on the UV Dosage delivered to the micro-organism.

UVGI inactivates micro-organisms by damaging the structure of nucleic acids and proteins at the molecular level, making them incapable of reproducing. DNA (Deoxyribonucleic acid) is critical for the growth of any viruses and other microorganisms. UV photons irradiated by UV lamps can damage DNA in a variety of ways, resulting in the organism’s inability to replicate or even its death. An organism that cannot reproduce is no longer capable of causing disease. UVGI effectiveness depends primarily on the UV Dosage delivered to the micro-organism.

The main components of the UVGI system are UV lamps, Parabolic Reflector, Ballast and alloy metal framing for holding the structure. The UV lamps are having a life span of 9000 hours to 12000 hours. The IP54 rated enclosure encloses the High-efficiency UV ballast to ensure that there is no damage to the control panel for the effective working of the system.

Improved Air Quality

Various researches worldwide proved that UV lamps can improve indoor air quality as it has an effective killing against every sort of infection causing Bacteria, Viruses & Fungi when exposed to desired UV dosage. The United States General Services Administration called for UVC to be included in AHU’s cooling coils for all federal facilities and to keep up coil cleanliness as it eliminates the growth of Mold & Mildew and improves indoor air quality.

AHU Maintenance Savings

In HVAC maintenance coil cleaning of AHUs is a major problem. Manually cleaning the coil is quite difficult to do but this can be easily achieved by a safe alternative UVGI. Significant reduction in maintenance costs because it prevents periodic cleaning of coils. Also, the chemical cleaning is harmful as the left out chemical when coming out with the air causes health hazards.

Green Building Benefits

UV lamps also help the building owners in getting Green Building Benefits as there is no wastage of water by cleaning the coils with jet pumps. The fan and motor bear less load which in turn saves energy.

Energy Saving

For HVAC systems UVGI units can help in Energy Savings through cooling Energy Savings & fan Energy savings and significantly increases the life span of the coil. On average, UVGI results in net savings/ Efficiency improvement of anywhere between 10-15% of the HVAC energy costs in a typical system.

Increased Life Of HEPA Filters

With UV Lamps installation, it takes charge of killing the contagious virus & bacteria then and there which increases the life of HEPA filters as a load of microorganisms becomes minimal.