Schwank SchwankAir 2045, Инструкции по установке, эксплуатации и обслуживанию

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Sound pressure levels dB(A) at 3m/10ft distance are for a single air curtain mounted at its maximum mounting
height, operating in a room with average acoustic characteristics as defined in CIBSE Guide B5 (reverberation
time 0.7s at 1kHz) and a room size equivalent to 8 air changes per hour (ac/h). Care needs to be taken when
selecting air curtains for an installation as noise levels can be several dB higher if the mounting height is reduced,
if the room is more ‘live’ (i.e. hard surfaces, no furnishings or absorbent materials), if the room is smaller than 8
ac/h equivalent or a combination of these factors. Noise levels will also increase if more than one air curtain is
installed at the same doorway (e.g. +3dB(A) for 2 equal point sources: direct field).