Unit of Measure

Specifications

Length

139 in

Use for

Woods Varofoil Fans

Casing Side

152 in

Inlet Diameter

145 in

Outlet Diameter

71.00 in

Maximum Air Flow

147000 ft³/min

Shape of Inlet/Outlet

Round Inlet

Silencer Size Class

D

Type

Acoustical

Dynamic Insertion Loss

Dynamic Insertion Loss @ 63 Hertz (Hz), 1500 Feet per Minute (FPM)

9 dB

Dynamic Insertion Loss @ 125 Hertz (Hz), 1500 Feet per Minute (FPM)

18 dB

Dynamic Insertion Loss @ 250 Hertz (Hz), 1500 Feet per Minute (FPM)

18 dB

Dynamic Insertion Loss @ 500 Hertz (Hz), 1500 Feet per Minute (FPM)

31 dB

Dynamic Insertion Loss @ 1000 Hertz (Hz), 1500 Feet per Minute (FPM)

31 dB

Dynamic Insertion Loss @ 2000 Hertz (Hz), 1500 Feet per Minute (FPM)

28 dB

Dynamic Insertion Loss @ 4000 Hertz (Hz), 1500 Feet per Minute (FPM)

20 dB

Dynamic Insertion Loss @ 8000 Hertz (Hz), 1500 Feet per Minute (FPM)

20 dB

Note

Note

For each 1500 FPM over 1500, add 1 dB per band.