The fight against COVID-19 has proven to be a multi-layered one — combining vaccination with social distancing, mask wearing and disinfection. And as this article explores, the addition of innovative air filtration systems can significantly help reduce airborne contaminants indoors — helping schools, offices and businesses return to operations while keeping citizens safe. This article has been written by Christian Hendriksen, CEO & Co-Founder of Rensair. Rensair provides portable hospital-grade air purifiers to the government, schools, hospitals, health care facilities, businesses, and more. They are working with customers like the City of Miami, the NBA, the UK’s National Health Service, and numerous hospitals and businesses. Rensair is part of Public Spend Forum’s GovMarket Growth Program.
The biggest risk of COVID-19 transmission is airborne. Could tackling clean air be a way through the pandemic?
The impact of COVID-19 on the NHS has been devastating, and it has now been reported that it could take up to five years to clear the backlog. If the country suffers from further waves caused by new variants, waiting times could extend even further.
People are calling for a bold, transformative approach to resolve this crippling issue. Clearly, a raft of measures is needed, both financial and operational. If the NHS is to live long term with COVID-19, it needs to cover all the bases: not just the complex issues like human resources and capacity increases, but simpler issues too.
An airborne threat
Simpler issues like clean air. We now know that the biggest risk of COVID-19 transmission is airborne, while the risk of surface transmission is very low (just a 1 in 10,000 probability, according to the Centers for Disease Control).
While the airborne transmission is a major issue for hospitals, many struggles to meet the NHS’s own ventilation guidelines of six air changes per hour inwards. This so-called ‘structural under ventilation is mainly due to inadequate existing ventilation systems in older NHS hospitals and prohibitive retrofit costs, not to mention the disruption that a new heating, ventilation, and air conditioning (HVAC) installation would entail.
The airborne threat is threefold:
- Through droplets and aerosols – spreading the infectious agent by coughing or sneezing.
- By airborne infection – a person directly inhales the exhaled breath of an infected person.
- By airborne dissemination – the infectious agent is disseminated in the air, for example during bed-making.
Clean air solutions can not only be a quick fix but are arguably the most potent weapon in the battle against COVID-19. That is, of course, if the technology is specified correctly.
A multi-faceted defense system
The World Health Organization recommends air purifiers to supplement integrated ventilation systems, while the UK SAGE committee, in its November 2020 report on air-cleaning devices to combat SARS-CoV-2 transmission, recommends two technologies: fibrous filtration (HEPA) and germicidal UV (UVC). Together, they trap and destroy the virus. This is supported by a new report on infection resilient environments, commissioned by the UK government’s Chief Scientific Adviser and published by the Royal Academy of Engineering.
The efficacy of HEPA filtration is well documented and is even endorsed by NASA. When applied to the current pandemic, it achieves more than 99.97 percent efficacy when trapping the typical size of COVID-19 particles (circa 0.1 microns) and the typical size that COVID-19 particles are transmitted when enveloped in respiratory fluid droplets (circa 0.5 microns and above), leaving nothing but pure air.
Of course, the novel coronavirus is not the only threat that can be quelled with clean air. We can predict what will happen with drug-resistant bacteria and we know that it requires a multi-faceted defense system that includes clean air.
While the crisis calls for revolutionary thinking, there is one easy fix that is merely evolutionary
Norovirus is a case in point. With particles approximately 27-38 microns in diameter, which are easily trapped by HEPA filtration, it is known to spread in aerosol droplets that are created when infected children or adults vomit and/or have diarrhea. Despite that knowledge, preventative measures still focus on fomite cleaning and hand washing, even though, globally, norovirus results in a total of $4.2 billion in direct health system costs and $60.3 billion in societal costs per year.
The NHS has been operating at a vastly reduced capacity due to COVID-19 infection control measures. Dr. Layla McCay, director of policy at the NHS Confederation, acknowledges that “The NHS faces a mammoth task to recover the treatment backlog that has built up during the pandemic”. While the crisis calls for revolutionary thinking, there is one easy fix that is merely evolutionary.
That fix is portable, hospital-grade air purification to supplement existing integrated HVAC systems. High performance (min 99.97 percent efficacy), cost-effective (fraction of the cost of a new HVAC system), multi-tasking (viruses, bacteria, allergens), and instant to install (simply plug and play). Job done.
This article was originally published by the NHS Confederation. View the original.