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Well-being in buildings


mitigation strategy. The machine was listed by Time Magazine as one of the 100 Best Inventions of 2020, and recently crowned Air Conditioning Innovation of the Year in the UK Cooling Industry Awards. It has two stages of fi ltration. An M5 pre-fi lter provides protection for the machine and extends its


Left: Matthew Maleki, Fan Coil & CCU Product Manager Carrier & Ciat


spores and moulds, reducing infection risks. The lamps are low impact and energy-effi cient, and their physical presence inside the unit has a minimal eff ect on airfl ow resistance. The lamps are fully enclosed within the AHU’s metal housing, and units are equipped with safety interlocks to protect technicians during maintenance. It seems likely that the coronavirus is not going


working life, while H13/14 HEPA fi lters to European Standard EN-1822 operate with a rated effi ciency of 99.995% at the most penetrating particle size. OptiClean can be operated in two modes. As a


negative-pressure machine, it generates a ‘vacuum eff ect’ in a room to limit the escape of contaminated air into adjoining spaces. Air in the room is drawn through the machine, fi ltered and expelled outside the building using fl exible ducting. Alternatively, it can be used to support existing ventilation as a stand-alone air scrubber to reduce risks and mitigate airborne contamination. Three model sizes deliver airfl ow rates of 1,000, 1,800 and 2,500 cubic metres per hour. Designed to be super-quiet, noise levels can be further controlled using the variable-speed fan control to meet the requirements of sensitive operations for hospitals, classrooms, libraries and hotels. To broaden protection, activated charcoal fi lters


can be used to reduce odours and absorb VOCs. Carrier off ers AHUs equipped with UV-C lamps at strategic points inside the casing. The lamps fl ood the interior with UV-C light, targeting pathogens on the coil surface and drip tray. UV-C light has been used for more than a century


to disinfect public water supplies due to its ability to quickly and eff ectively inactivate potentially harmful pathogens. UV-C light disrupts the molecular structure of water and air-borne bacteria, viruses,


to go away in the short term. According to some experts, we may simply have to learn to live with it. In this context, our industry clearly has a vital role to play in helping to minimise risks by delivering engineering controls for buildings. According to a recent Carrier White Paper, Air- cleaning and Filtration: Addressing the Unseen in the New Normal : “Buildings have become a fi rst line of defence in reducing the transmission of an unseen viral threat. HVAC systems play a critical role in this defence.” The American Society of Heating, Refrigerating


and Air-Conditioning Engineers (ASHRAE) concludes: “Ventilation and fi ltration provided by heating, ventilating, and air-conditioning systems can reduce the airborne concentration of SARS- CoV-2 and thus the risk of transmission through the air.” For building owners and engineers, optimising these systems through the adoption of specifi c air fi ltration solutions can eff ectively reduce the risk of pathogen transmission, improve the health and comfort of occupants, and maintain the profi tability and competitiveness of their building operations. Through a suite of advanced solutions and


services, Carrier’s Healthy Buildings Programme helps deliver healthy, safe, effi cient and productive indoor environments at a time they’re needed most. From building assessments and monitoring to fi ltration solutions designed to improve IAQ, Carrier’s experts will work to assess, upgrade, maintain and sustain buildings.


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