Greenheck AFJ-120 User Manual
Acoustical Louver
J Blade
Application and Design
AFJ-120 is an acoustical weather louver designed to protect air intake
and exhaust openings in building exterior walls. Design incorporates
J style insulated acoustical blades and high free area to provide
maximum resistance to sound transmission, rain and weather while
providing minimum resistance to airflow. The AFJ-120 is an extremely
efficient louver with AMCA LICENSED PERFORMANCE DATA
enabling designers to select and apply with confidence.
Standard Construction
Frame � � � � � � � �Heavy gauge formed aluminum,
12 in. x 0.080 in. nominal wall thickness
Blades � � � � � � � �J style, heavy gauge formed aluminum,
0.080 in. nominal wall thickness, positioned
at 45º on approximately 5 in. centers
Construction . . .Mechanically fastened
Acoustical
Insulation � � � � � Fiberglass Insulation
Birdscreen � � � � �3/4 in. x 0.051 flattened expanded aluminum in
removable frame, inside mount (rear)
Finish � � � � � � � � � Mill
Minimum Size � �12 in. W x 19 in. H
Maximum Single
Section Size � � � 60 in. W x 120 in. H
AFJ-120
Options (at additional cost)
• A variety of bird and insect screens
• Blank off panels
• Clip angles
• Extended sill
• Filter racks
• Flanged frame
• Galvanized steel frame and blade
• Security bars
• A variety of architectural finishes including:
Clear anodize
Integral color anodize
Baked enamel paint
Kynar paint
*Width and height dimensions furnished
approximately ¼ inch under size.
Pa
in. wg
Static Pressure Drop
Free Area Chart (Sq. ft.)
Water Penetration per Unit Free Area
Louver
Height
Inches
12 18 24 30 36 42 48 54 60
19 0.12 0.21 0.29 0.37 0.45 0.53 0.61 0.69 0.77
24 0.25 0.41 0.57 0.74 0.90 1.06 1.22 1.38 1.55
30 0.37 0.62 0.86 1.10 1.35 1.59 1.83 2.08 2.32
36 0.50 0.82 1.15 1.47 1.80 2.12 2.44 2.77 3.09
42 0.62 1.03 1.43 1.84 2.24 2.65 3.05 3.46 3.86
48 0.75 1.24 1.72 2.21 2.69 3.18 3.67 4.15 4.64
54 1.00 1.65 2.30 2.94 3.59 4.24 4.89 5.54 6.18
60 1.12 1.85 2.58 3.31 4.04 4.77 5.50 6.23 6.96
66 1.25 2.06 2.87 3.68 4.49 5.30 6.11 6.92 7.73
72 1.37 2.26 3.16 4.05 4.94 5.83 6.72 7.61 8.50
78 1.50 2.47 3.44 4.41 5.39 6.36 7.33 8.30 9.27
84 1.75 2.88 4.02 5.15 6.28 7.42 8.55 9.69 10.82
90 1.87 3.09 4.30 5.52 6.73 7.95 9.16 10.38 11.59
96 2.00 3.29 4.59 5.89 7.18 8.48 9.77 11.07 12.37
102 2.12 3.50 4.88 6.25 7.63 9.01 10.38 11.76 13.14
108 2.25 3.71 5.16 6.62 8.08 9.54 11.00 12.45 13.91
114 2.50 4.12 5.74 7.36 8.98 10.60 12.22 13.84 15.46
120 2.62 4.32 6.02 7.73 9.43 11.13 12.83 14.53 16.23
Louver Width Inches
Airflow Resistance (Standard Air - �075 lb/ft
AFJ-120PERFORMANCE DATA
J Blade Acoustical Louver
Formed Aluminum
Greenheck Fan Corporation certifies that the AFJ-120
louvers shown herein are licensed to bear the AMCA Seal.
The ratings shown are based on tests and procedures
performed in accordance with AMCA Publication 511 and
comply with the requirements of the AMCA Certified Ratings
Program. The AMCA Certified Ratings Seal applies to water
penetration, air performance and sound ratings.
Sound Transmission Class
The Sound Transmission Class (STC) is a rating of the effectiveness of
an assembly in isolating or reducing airborne sound transmission. STC is
a single number that summarizes airborne sound transmission loss data.
Assemblies with higher STC ratings are more efficient at reducing sound
transmission. STC is determined in accordance with ASTM E413-04.
Transmission Loss
Transmission loss (TL) is a measurement of the reduction of sound power
transmission (dB) through an assembly at a given frequency. The more
sound power that is reduced, the greater the TL. TL is tested in accordance
with ASTM E90-04.
Free Field Noise Reduction in Decibels
Free Field Noise Reduction is determined by adding 6 dB to the Transmission Loss.
Octave Band 2 3 4 5 6 7 STC
Frequency (Hz) 125 250 500 1000 2000 4000
Transmission Loss (dB) 7 6 11 19 30 19
Free Field Noise Reduction (dB) 13 12 17 25 36 25
3
)
16
1
0.9
200
100
90
80
70
60
50
40
30
0.09
20
0.08
0.07
0.06
0.05
10
0.04
9
8
0.03
7
6
5
0.02
ft/min:
m/s:
Test Size 48 in. x 48 in.
0.8
Standard Air - .075 lb/ft
0.7
0.6
0.5
0.4
0.3
0.2
0.1
200 300 400 500 600 700 800 9001000 2000 3000
3
Exhaust
Intake
2345678910
Free Air Velocity
Model AFJ-120 resistance to airflow (pressure drop) varies
depending on louver application (air intake or air exhaust).
Free area velocities (shown) are higher than average
velocity through the overall louver size. See louver selection
information.
Water Penetration (Standard Air - �075 lb/ft
3
)
Test size 48 in. x 48 in. Test duration of 15 min.
ml/m2
oz/ft2
0.30
Test Size 48 in. x 48 in.
80
0.25
0.20
60
0.15
40
0.10
20
0.05
0.00
0
ft/min:
m/s:
Test Period 15 minutes
Standard Air - .075 lb/ft
900 950 1000 1050 1100
5.0 5.5
3
Free Area Velocity
The AMCA Water Penetration Test provides a method for comparing various
louver models and designs as to their efficiency in resisting the penetration
of rainfall under specific laboratory test conditions. The beginning point of
water penetration is defined as that velocity where the water penetration curve
projects through .01 oz. of water (penetration) per sq. ft. of louver free area.
The beginning point of water penetration for Model AFJ-120 is
*
961 fpm free area velocity� These perfor mance ratings do not guarantee
a louver to be weather proof or stormproof and should be used in combination
with other factors including good engineering judgement in selecting louvers.
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