75F, 75F Epidemic ModeTM, 75F Smart PurgeTM, 75F Smart Enhanced Ventilation, HVAC system, Ventilation systems, Indoor air quality, ISHRAE, ASHRAE, Ventilation guidelines

75F launches Epidemic ModeTM

The new HVAC software sequence will help make workplaces safe and healthy during the COVID-19 crisis

As offices prepare to reopen across India, buildings are the new front in the fight against COVID-19. 75F announced 75F Epidemic ModeTM, a new HVAC software sequence that ensures commercial buildings are healthier while keeping employees and customers safe. The system features various components such as indoor air flushes, where post working hours the entire air within the premises is replaced with fresh air from outside and during office hours ventilation from outside is increased to limit movement of airborne particles and reuse of indoor air. These strategies are based on the latest guidance from scientists, government organisations, and global industry leaders.

Recent studies show the spread of COVID-19 appears to be occurring through airborne transmission of aerosols, particles 1-5 microns in size which cannot be reliably filtered out using a MERV-13 or HEPA filter. While much of the focus is on droplets of 100-1000 microns in size produced by coughing or sneezing, a large quantity of aerosolised infectious particles are also produced, and are more likely to be produced by asymptomatic individuals or those who do not know they are infected simply from breathing or speaking. A recent study showed that more than 1000 of these virus-containing aerosols are emitted every minute of  speaking, more proof that without dilution, ventilation from outside air, buildings have a high risk of viral build-up and exposure.

In response to this, various organisations such as ISHRAE (Indian Society of Heating, Refrigerating and Air-conditioning Engineers), ASHRAE (American Society of Heating, Refrigerating and Air-conditioning Engineers) and the CDC (Centre for Disease Control) have released new guidelines for the operation and control of HVAC systems to reduce disease transmission from infectious airborne particles and ensure a safe and healthy workplace.

The 75F Epidemic ModeTM achieves the directives through its specific application profiles; Smart PurgeTM and Smart Enhance VentilationTM. 75F’s Smart PurgeTM application profile works in pre- and post-occupancy settings and fully adheres to ISHRAE, ASHRAE recommendations to prevent re-circulation of air and to purge the air before and after occupancy. 75F Smart Enhanced Ventilation ensures the indoor environment remains as safe as possible during a building’s occupied period and reduces risk of infection from aerosolised particles.

Apart from minimising viral loads in buildings, the 75F Epidemic ModeTM also delivers significant energy savings. Increasing ventilation from 20% outside air to 90% outside air can normally lead to a high energy bill, but with the 75F Epidemic Mode profiles, concentration of infectious airborne particles is reduced while energy consumption is minimised.

“The world is in the midst of a pandemic with so many unknowns, where the brightest minds are developing innovative ways to modify their businesses and 75F Epidemic Mode does that for the commercial building industry,” said Deepinder Singh, CEO and founder of 75F.

“Being able to give companies and their employees some peace of mind that their facilities managers are taking the initiative to make their environments safe and healthy is extremely important and we believe will become the norm even when the outbreak is over,” added Gaurav Burman, APAC president of 75F.



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