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Article By MG Cooling Solutions In UVGI - April 11, 2021

From the past few years, there is a boost in HVAC (Heating Ventilation Air Conditioning) industry because of the increasing demands in industries, commercial buildings, schools, offices, hotels, schools, hospitals, etc. HVAC systems provide a better indoor environment and acceptable indoor air quality but due to the ongoing pandemic, there is a change in the safety guidelines. Viruses, bacteria, molds, and fungus can grow inside HVAC systems and get distributed all over the premise through AC ducts and there is a risk of cross-contamination. UVGI (ultraviolet germicidal irradiation) is the solution for this problem, it uses UV-C rays to kill microorganisms present inside the premise. Installing a UVGI system in HVAC will increase the safety of the occupants and makes the indoor environment healthy.

UVGI technology disinfects air by emitting UV-C rays at a wavelength of 253.7nm that kills microorganism by disrupting their DNA so that they won’t be able to replicate and ultimately got killed. UVGI installed in the HVAC system can help in removing up to 99.9% of viruses and kills up to 90% of certain airborne bacteria that circulate through the air system. Air disinfection with UVC provides better system efficiency and airflow that saves money and time. In the HVAC industry UVGI systems can be implemented mainly into 2 core area: –

  1. UVGI application in the Air Handling Units (AHU) of HVAC

In the AHU, heat exchange takes place in the cooling coils; here transfer of heat and mass takes place. Cooling coils are constructed of closely spaced aluminium fins to increase heat transfer, they are connected to the rows of copper tubes that increase the airside surface area.

Humidity and moisture constantly present on the cooling coils promotes the growth of microorganisms and the formation of bio films. Cooling coils are very susceptible to airside fouling because of the combination of bio films and closely spaced fins. The blow off from this bio film is the reason for deteriorated and harmful indoor air quality (IAQ) In all buildings. This leads to the chiller operating under non-optimum conditions utilizing more energy than usual.

By installing a proper UVGI air disinfection system or ultra-coil in front of the coil helps in eliminating bio films and kills microorganisms and viruses like corona viruses. A cleaner coil will result in the following advantages: –

  • Thermal efficiency (sensible loads) of the cooling coil will be increased
  • Load on the chillers will be decreased saving 10-15% energy
  • There will be a reduction in the microbial counts>15%
  • The life of the coil will be increased by avoiding manual cleaning
  • IGBC (Indian Green Building Council) points will be earned
  • UVGI Application in the ducting system of HVAC
UVGI Application

The HVAC system can act as a carrier to circulate a variety of air-borne contamination coming from a variety of sources. Transmission of airborne diseases through HVAC is more prevalent nowadays than previously encountered. UVGI technology can be installed straight in the ducting system in which it will disinfect moving airstreams by inactivating airborne microorganisms found within

Air-borne diseases can affect between 10 and 20% of people and are fatal in some cases. The use of UV ultra-duct assures single-pass disinfection of airborne viruses and bacteria. It is installed in the supply or returns ducts to purify the circulating air and prevent cross-contamination and infections. The benefits of installing ULTADUCT in HVAC systems are: –

  • It provides air disinfection and improves air quality
  • It will help in removing sick building syndrome
  • Life of the HEPA (High-Efficiency Particulate Air) will be increased as the load of the live organism is reducing
  • It will eliminate cross-contamination
  • It can target specific bacteria as per requirement

 MG Cooling solution can help you with any kind of air purification or UVGI related queries. We are a leading HVAC enterprise that believes in building the trust of our clients and we have the answer for all your cooling, heating, and ventilation needs. We are working to fulfil the demand of the current situation to provide your space with healthy and bacteria-free air.

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