Tuesday, June 16, 2020
75F Launches Epidemic Mode to Make Offices and Businesses Healthier During Pandemic
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 100-1000 microns in size produced by coughing or sneezing, a large quantity of aerosolized 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 ahigh 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.
Epidemic Mode is updated by 75F as guidelines from these organisations evolve or new data emerges. This means it offers the most current sequences that minimize operating expense and viral transmission, while improving indoor air quality (IAQ) and energy efficiency.
Key guidelines from above recommended organisations include increasing outside air ventilation to reduce the viral load inside buildings, disabling demand-control ventilation (DCV) and increasing minimum outside air damper positions for greater outside air ratio.
These key guidelines are available out-of-the-box when you utilize 75F’s full-stack suite of sensors and controls. The 75F Epidemic Mode does not require any manual programming and there is no risk of equipment damage from running the system outside typical parameters. The 75F Epidemic Mode achieves the directives discussed above through its specific application profiles; Smart PurgeTM and Smart Enhance Ventilation.
75F Smart Purge
75F’s Smart Purge 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. The pre-purge activates three hours ahead of expected occupancy and runs for two hours, allowing up to one hour of preconditioning before building occupants arrive for optimal comfort. Post-purge activates when the scheduled occupied period ends and runs for two hours. Overnight between these indoor air flushes, the system will keep the building at setback temperatures with minimal outside air to conserve energy and ensure relative humidity levels are maintained.
75F Smart Enhanced Ventilation
This profile ensures the indoor environment remains as safe as possible during a building’s occupied period and reduces risk of infection from aerosolized particle. The 75F system only activates this profile during a scheduled occupied timeframe per ISHRAE directives. When the building is occupied, the OA damper is moved to the maximum position allowable based on the system’s ability to meet desired temperatures. This ensures the greatest amount of outside air is drawn in for dilution ventilation based on the system capacity and weather conditions.
Apart from minimizing 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 minimized.
“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”, adds Gaurav Burman, APAC President of 75F.
75F offers the only system on the market today currently implementing these healthy buildings measures, which are available free of charge to all customers in office buildings, retail businesses, schools, restaurants, and apartment buildings. Once the pandemic is controlled, 75F technology will allow facility managers to easily, and remotely, disable these measures, with a return to 75F's award-winning algorithms to improve the comfort of occupants.
Other systems require manual programming for each sequence, which involves significant expense, and puts the equipment at greater risk of damage. For new customers, 75F has a fully automated, easy-to-install system out–of–the box, with controls that scale from simple rooftop units (RTUs) to complex air handling units (AHUs). 75F’s wireless install also eliminates the need for tearing up ducts for wiring, and offers integration with the 75F Facilisight portal and app for portfolio-wide analytics, easy scheduling, remote configuration, fault detection, and diagnostics.