Unit of Measure

Specifications

Length

43 in

Use for

Greenheck Vane Axial Fans

Casing Side

50 in

Inlet Diameter

43 in

Outlet Diameter

20.375 in

Maximum Air Flow

13000 ft³/min

Shape of Inlet/Outlet

Round Inlet

Silencer Size Class

A

Type

Acoustical

Dynamic Insertion Loss

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

2 dB

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

6 dB

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

12 dB

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

21 dB

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

25 dB

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

25 dB

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

14 dB

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

11 dB

Note

Note

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