35
42EM 1.0 - with two discharge spigots
Octave band frequency (Hz)
V Type 125 250 500 1 K 2 K 4K 8K dBA
V1 SUP 56.8 54.1 46.2 43.3 39.5 33 26.1 50
RET 59.5 56.9 51.6 46.6 42.9 39.5 33.9 53.4
RAD 56.2 49 44.5 38.5 34 27 26.1 46.4
V2 SUP 54.3 50.4 42.7 39.6 35.8 27.8 22.9 46.5
RET 57.3 53.2 48.6 43.1 39.3 34.8 29.1 50.1
RAD 52.7 45.5 41 35.1 30.2 22.2 22.4 42.8
V3 SUP 51 47.8 40.1 36.7 32.8 23.9 21.8 43.8
RET 54.5 50.6 46 40.6 36.2 30.6 23.9 47.4
RAD 51.8 42.8 36.3 31.9 27.4 19.1 20.9 40.1
V4 SUP 47.9 44.2 36.9 33.2 28.8 19.7 21.4 40.3
RET 51.4 46.8 42.8 36.9 31.9 24.7 21.1 43.8
RAD 48.5 39.4 33.1 28.3 23.5 16.5 20.3 36.8
V5 SUP 44.9 41.5 34.1 29.9 24.8 17.5 21.2 37.3
RET 48.4 43.7 40.2 33.5 27.4 20 20.4 40.7
RAD 44.8 36.5 30.2 25.1 19.5 15.5 20.1 33.6
V6 SUP 42.6 39.1 32.1 27.1 21.4 16.7 21.2 35
RET 46.2 41.7 38.2 30.7 23.9 17.7 20.3 38.4
RAD 42.4 34.6 28.4 22.4 16.8 15.2 20.1 31.5
42EM 2.0 and 3.0 - with two discharge spigots
Octave band frequency (Hz)
V Type 125 250 500 1 K 2 K 4K 8K dBA
V1 SUP 56.9 53.3 49.1 40.5 34.2 29.8 22.2 49.8
RET 62.2 59.5 55.5 48.2 44.2 39.4 31.7 56.5
RAD 53.4 47.2 40.7 35.2 31.1 21.8 21.2 43.7
V2 SUP 53.8 50.1 45.7 36.8 30.1 24.5 19.5 46.5
RET 58.2 55.6 52.4 44.4 39.9 34 25.7 52.9
RAD 49.7 43.7 37.5 30.9 27.1 17.2 18.6 40.1
V3 SUP 49 44.4 40.3 30.5 22.6 16.1 18.6 40.9
RET 53.2 50 46.9 37.9 32.3 25.3 19.9 47.1
RAD 46.2 38.0 32.4 24.7 20.0 13.6 18.2 35.1
V4 SUP 43.5 38.6 34.2 23.1 14.4 11.6 18.5 34.9
RET 49.5 45.4 42.3 32.3 25.6 18.8 19.1 42.4
RAD 43.1 32.4 26.8 17.5 12.9 12.6 18.1 30.5
V5 SUP 39.8 36.3 27.7 17.7 9.4 9.7 18.1 30.9
RET 43 41.3 37.2 26.8 18.7 14.7 17.5 37.4
RAD 40.6 29.6 22.7 13.3 9.6 12.6 18.1 27.8
V6 SUP 39.3 33.4 28.1 15.6 8.5 11.1 18.5 29.7
RET 42.8 38.3 34 22.3 15.2 15.4 19.1 34.7
RAD 38 27.5 20.4 11.5 10 13 18.8 26
42EM 2.1 and 3.1 - with two discharge spigots
Octave band frequency (Hz)
V Type 125 250 500 1 K 2 K 4K 8K dBA
V1 SUP 55.5 50 44 38.2 32.4 24.7 20.6 46.4
RET 58 52.1 48.1 41.8 35.9 30.8 26.5 49.6
RAD 49.6 41.7 36.3 29.9 26.8 17.3 20 39.1
V2 SUP 52.9 46.4 41.1 33.5 27.4 20.7 19.6 43
RET 54.5 49.1 45.6 38.8 31.4 27.8 24.5 46.6
RAD 46.6 38.7 33.3 26.4 21.8 15.3 19 35.9
V3 SUP 49 43.2 37.9 30.2 22.1 16.7 19.4 39.6
RET 51.4 45.7 42.1 34.6 27.1 23.9 22.9 43.1
RAD 43.6 34.7 29.9 22.6 18 13.6 18.8 32.5
V4 SUP 45 40 34.3 25.2 17.4 15.7 19.4 36
RET 47.8 42.6 38.6 29.8 25.4 22.3 22.5 39.6
RAD 40.4 32.3 26.4 17.9 15 13.3 18.6 29.5
V5 SUP 42 37 31.3 22.1 14.2 13.4 18.6 33
RET 44.8 39.6 35.6 26.6 22.3 19.9 20.5 36.7
RAD 37.4 29.3 23.4 14.9 12 12.3 18.3 26.8
V6 SUP
RET Speed not available for 230 V
RAD
Legend:
V - Fan speed
SUP - Supply (dB re = 10
-12
W)
RET - Return (dB re = 10
-12
W)
RAD - Radiated (dB re = 10
-12
W)
NOTE: The measurements are based on ISO standards and
are without supply and return octopus plenums.
The room sound level calculations must take account of the
sound absorption of the duct, the plenum, the room and
ceiling.
For a selected speed the sound level can vary within a
tolerance of ± 2 dB(A), depending on the available static
pressure.
42EM 2.2 and 3.2 - with three discharge spigots
Octave band frequency (Hz)
V Type 125 250 500 1 K 2 K 4K 8K dBA
V1 SUP 61.9 56.6 50.2 45 38.7 33.6 25.6 52.9
RET 63.9 59 53.8 48.6 43.2 39.1 34 56
RAD 53.8 48 41.9 37.2 34 25.4 23.5 44.9
V2 SUP 61.2 54.8 48.6 43.1 36.8 31.2 23.8 51.4
RET 62.3 57.1 52.3 46.8 41.2 36.6 31.3 54.2
RAD 52.5 46.3 40.5 35.4 32.1 22.7 21.8 43.3
V3 SUP 58.1 51.7 46 40 33.3 26.8 21 48.4
RET 59.5 54.4 49.8 44 37.9 32.8 27.7 51.5
RAD 50.8 43.2 38 32.4 28.9 19 20 40.7
V4 SUP 54.4 47.9 42.6 36 28.6 21.4 19.9 44.6
RET 56.3 50.6 46.7 40.2 33.4 28.4 25 48
RAD 47.8 39.7 34.7 28.4 24.2 15.4 19.1 37.3
V5 SUP 49 43.2 37.9 30.2 22.1 16.7 19.4 39.6
RET 51.4 45.7 42.1 34.6 27.1 23.9 22.9 43.1
RAD 43.6 34.7 29.9 22.6 18 13.6 18.8 32.5
V6 SUP 43 38 32.3 23.1 15.2 14.4 19.1 34
RET 45.8 40.6 36.6 27.6 23.3 20.9 21.4 37.7
RAD 38.4 30.3 24.4 15.8 13 13.1 18.6 27.8
42EM 2.3 and 3.3 - with four discharge spigots
Octave band frequency (Hz)
V Type 125 250 500 1 K 2 K 4K 8K dBA
V1 SUP 65.7 62 54.9 50.6 44 39.9 32.7 57.9
RET 66.5 62.9 57 52.4 47.6 44.2 39.7 59.6
RAD 56.5 52.3 44.8 41.2 37.1 30.4 29.2 48.5
V2 SUP 65.5 60.8 54.1 49.7 43.2 38.8 31.4 57.1
RET 66.1 62.1 56.2 51.6 46.7 43.1 38.4 58.8
RAD 55.7 51.3 43.9 40.3 36.2 29.2 27.8 47.6
V3 SUP 64 59.3 52.8 48.2 41.7 36.9 29.2 55.6
RET 64.9 60.4 55 50.3 45.3 41.3 36.3 57.4
RAD 54.5 49.6 42.7 38.9 34.8 27.2 25.8 46.1
V4 SUP 62.1 56.6 50.6 45.6 39 33.5 25.8 53.2
RET 63.6 58 53.2 48.2 43 38.4 33.4 55.4
RAD 52.8 47.1 40.6 36.4 32.2 23.7 22.9 43.8
V5 SUP 57.8 51.8 46.2 40.5 33.7 26.7 21 48.5
RET 58.9 53 48.9 43.2 37.3 31.8 27.3 50.6
RAD 48.5 42.3 36.6 31.6 27.7 18.3 19.6 39.4
V6 SUP 51.2 46.1 40.6 33.8 25.7 18.3 19.3 42.4
RET 53.5 47 43.4 36.6 29.4 24.7 23.5 44.6
RAD 42.9 36.8 31.1 25 19.9 13.8 18.6 33.6
9.5.2 - Insulation class ‘0’ in accordance with BS476, part 6 and 7
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