The legislation on smoking in public areas becomes more and more stringent. Biddle has adapted the CITY S in order to create an air curtain manufacturers for smoke separation, which can be used in areas with small temperature difference (typically 5°C or less) without any draught. This unit has much less air flow and air velocity than the CITY S because of the lower building fan speed combined with a wider discharge opening. This avoids any comfort problems and noise inconvenience. The CITY Elia is always a custom made product. If you have a request for smoke separation, please ask us for advice.