The Coronavirus crisis may be dominating the current news but for Weiss Technik, the task of controlling and containing viruses and bacteria started approximately 50 years ago when they introduced their first “Ultra Clean Ventilation” system (UCV). Originally developed for hospital theatre applications to contain airborne particles, Weiss Technik’s innovative UCV systems are now specified around the globe for situations where infection control and containment are critical health factors.
Rupert Mack is Weiss Technik’s director of strategic business area Mediclean and is a member of German DIN 1946 as well as European WG 18 TC 156 committee. Rupert has overseen the continuous development of a range of industry-leading products and solutions that help to combat the spread of viruses in commercial settings.
He commented, “The main source of microbial aerosols in enclosed spaces can be deemed to be from human and animal organisms. Indoor air pollution is an important problem because people inhale between 6–10 litres of air per minute, which amounts to 15,000 litres of air per day. The health risks from exposure to poor indoor air quality is therefore significant because we spend around 90% of the day in indoor environments, of which approximately 25%* is spent at work (*during normal circumstances).
“Ironically, traditional air conditioning systems can actually increase the potential for bacteria and viruses to survive over a long period of time and distance. As we have witnessed, there is a propensity for viruses to increase during the colder months, natural ventilation is reduced when the population typically spends more time indoors and utilises additional heating sources. Whilst these situations are well known, in the event of a pandemic, as we are experiencing now, one needs to focus on solutions that provide an exceptional level of protection.
“Whilst the issues are complex, there are two fundamental types of airflow when considering how airborne particles spread: we differentiate unidirectional airflow (laminar flow) and dilution mixing airflow (there’s a direct flow top-down scenario and also a head-to-head situation). So, for example, in a hospital operating theatre air purification is a must. Our UCV systems actually cleanse a specific part of the room; typically directly above and around the operating table. The process is enhanced through our “Weiss Mediclean” traffic light system which provides a clear visual reference to air flow and virus content. This links to a dynamic system that automatically adjusts the air flow to ensure continuous protection.
“Our systems offer a high level of sophistication in their design and functionality. They feature a highly effective HEPA filtration system, combined with UVC light. A HEPA (High Efficiency Particulate Absorber) filter is a specific type of high-quality air filter that meets the HEPOA filter standard, which is to remove at least 99.97% of particles (aerosols) from the air down to at least 0.3 microns in size. The UVC radiation is a known disinfectant for air, water, and nonporous surfaces. UVC radiation has effectively been used for decades to reduce the spread of bacteria, such as tuberculosis.
“The truth is that all indoor confined spaces now pose a potential threat. Businesses need robust, proven and reliable solutions that offer an unprecedented level of protection for their employees. Our product range has recently been augmented with the introduction of new products and solutions for every room or situation where people are working or living.
“Vindur® Top is an important development of our cooling system with HEPA filtration and UVC light and offers businesses the opportunity to easily retro-fit a unit into a building refurbishment situation or to have a complete building air purification system specified at the design and build stages. Vindur® Top is programmed to achieve 3 to 5 kilowatt cooling capacity that helps to counteract equipment that generates heat.
“We have just unveiled our latest product called Vindur® Pure. This is a mobile air purification system without cooling. This “plug and play” unit provides effective virus and bacteria control in rooms up to 70m2 capacity. It includes two filters (efficiency and high efficiency) and a UVC light. It can easily and simply be installed in a room, in ether a mobile floor standing or wall-mounted situation. Plus, when required, the unit can be switch to UCV operation only, to save energy. Vindur® Pure is an ideal solution for businesses looking for a fast and effective method of protecting their employees.
“As I have mentioned, Weiss Technik has almost five decades experience in developing bio-safety products and solutions. We are experts and help our customers specify precisely the right system for their circumstances. The factors are many and complex. Determining how to avoid infection from one person to another means calculating the correct level and type of air flow based on the number of people in a room and their movements. It means calculating how temperature changes influence these circumstances and how the type of flow of air is consequently affected.
“I am proud of the exceptional team here at Weiss Technik – a team of specialists who have developed a remarkable range of air purification products that meet the HTM 0301 UK accreditation and continue to set new and innovative standards of technical excellence”.