The FFA.4 is one of the optimised operating theatre clean air canopies. It is primarily deployed where there is no room for circulating air modules due to the size of the operating theatre. As with ULA.4 circulating air canopy, in the FFA.4 the filtered clean air also flows into the operating theatre from above and forms a protection zone (operation table, instrument table and work area for the operating team in sterile clothing).
The FFA.4 is installed as per the tried and tested “wall-to-wall” system. FFA.4 canopies are characterised by surface-covering, terminal, horizontally installed high-efficiency particulate air filters, which are positioned directly in front of the fabric distributors (single layer or differential flow). A uniform air distribution is achieved with the horizontal high-efficiency particulate air filters and the fabric.
The resistance of the high-efficiency particulate air filters in the filter covered areas is considerably less than that of end-mounted filters and on average has a outflow speed of 0.24 m/s at 60 Pa.
Gauging heads for measuring test aerosol in unconditioned air are positioned clearly and centrally
Variable frame system with highest level of dimensional accuracy
Integrable in flush mounted “wall-to-wall” system, suitable for clean rooms