Biddle HR 25 - Page 9

HR MANUAL INTRODUCTION
Manual version 4.1 (26-07-2018)
en-9
en
Sound levels
Maximum sound power level in ducts
Maximum sound power level in unit housing
Maximum sound pressure level in standard room
SOUND POWER LEVEL
(L
W
RE. 10
-12
W)
OCTAVE BAND CENTRE FREQUENCY (HZ)
L
WA
DB(A)
63 125 250 500 1000 2000 4000 8000
HR 25
supply air 69.8 65.6 76.4 75.1 78.8 80.4 78.5 74.1 85.5
extract air 65.7 60.5 70.6 69.9 67.4 70.8 70.9 66.7 76.6
exhaust air 69.8 65.6 76.4 75.1 78.8 80.4 78.5 74.1 85.5
fresh air 65.7 60.5 70.6 69.9 67.4 70.8 70.9 66.7 76.6
HR 35
supply air 75.8 70.7 78.6 78.4 81.3 81.2 78.3 75.4 86.6
extract air 68.6 65.8 75.5 72.3 69.2 70.2 68.2 67.2 76.7
exhaust air 75.8 70.7 78.6 78.4 81.3 81.2 78.3 75.4 86.6
fresh air 68.6 65.8 75.5 72.3 69.2 70.2 68.2 67.2 76.7
HR 45
supply air 71.9 74.0 86.7 78.8 80.3 79.8 77.5 71.5 86.2
extract air 69.1 70.3 81.8 74.1 68.7 70.1 67.8 62.8 78.0
exhaust air 71.9 74.0 86.7 78.8 80.3 79.8 77.5 71.5 86.2
fresh air 69.1 70.3 81.8 74.1 68.7 70.1 67.8 62.8 78.0
TECHNICAL SPEED
D
B(A)
(L
WA
RE.10
-12
W)
HR 25 HR 35 HR 45
10 V DC (high speed) 74 74 78
8 V DC 68 69 75
6 V DC 63 64 68
5 V DC 58 60 62
TECHNICAL SPEED
D
B(A)
(L
PA
RE.2X10
-5
N/M
2
)
HR 25 HR 35 HR 45
10 V DC (high speed) 66 66 70
8 V DC 60 61 67
6 V DC 55 56 60
5 V DC 50 52 54