Greenheck ECD-401 Installation Manual
Combination Louver/Damper
Drainable Blade
Application and Design
ECD-401 is a combination louver/damper designed to protect air
intake and exhaust openings in building exterior walls that, at times,
require tight air shut off. Design incorporates a drainable head member,
drainable stationary blades and operable blades with exposed blade
linkage. When the operable blades are open, airflow is permitted
through the louver, when the blades are closed, a tight seal is created
to prevent the passage of air. The ECD-401 is an extremely efficient
louver with AMCA LICENSED PERFORMANCE DATA enabling
designers to select and apply with confidence.
Standard Construction
Frame . . . . . . . .Heavy gauge extruded 6063-T5 aluminum,
4 in. x 0.081 in. nominal wall thickness
Blades . . . . . . . .Drainable design, heavy gauge extruded
6063-T5 aluminum, 0.081 in. nominal wall thickness,
positioned at 37º and 45º angles on approximately
4 in. centers
Seals . . . . . . . . .Dual-durometer extruded vinyl blade and jamb seals
Temperature
Restrictions . . . .(-20º F) - (+180ºF)
Linkage . . . . . . .Exposed on-blade linkage
Bearings . . . . . .Synthetic sleeve type
Construction . . .Mechanically fastened
Birdscreen . . . . .3/4 in. x 0.051 in. fl attened expanded aluminum in
removable frame, inside mount (rear)
Finish . . . . . . . . .Mill
Minimum Size . . 12 in. W x 12 in. H
Maximum Single
Section Size . . . 120 in. W or 120 in. H (limited to 70 sq. ft.)
ECD-401
Options (at additional cost)
• A variety of bird and insect screens
• A variety of electric, pneumatic or manual actuators
• Extended sill
• Filter rack
• Flanged frame
• Glazing adaptor
• Hinged frame
• Security bars
• 0.125 in. nominal wall thickness
• 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.
ECD-401PERFORMANCE DATA
Combination Louver/Damper
Extruded Aluminum
Free Area Chart (Sq. ft.)
Louver
Height
Inches
12 24 36 48 60 72 84 96 108 120
12 0.29 0.68 1.06 1.44 1.82 2.20 2.59 2.97 3.35 3.73
24 0.67 1.54 2.41 3.28 4.15 5.03 5.90 6.77 7.64 8.51
36 1.08 2.49 3.90 5.30 6.71 8.12 9.52 10.93 12.33 13.74
48 1.55 3.57 5.58 7.60 9.62 11.63 13.65 15.66 17.68 19.69
60 1.93 4.44 6.94 9.44 11.95 14.45 16.96 19.46 21.97 24.47
72 2.34 5.38 8.42 11.46 14.50 17.54 20.58 23.62 26.66 29.70
84 2.81 6.46 10.11 13.76 17.41 21.06 24.71 28.36 32.01 35.66
96 3.19 7.33 11.47 15.60 19.74 23.88 28.02 32.16 36.30 40.43
108 3.60 8.28 12.95 17.62 22.30 26.97 31.64 36.32 40.99 45.67
120 4.07 9.36 14.64 19.92 25.20 30.49 35.77 41.05 46.34 51.62
Greenheck Fan Corporation certifies that the ECD-401
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 air performance and water penetration ratings.
Airflow Resistance (Standard Air - .075 lb/ft
Pa
in. wg
1
0.9
200
100
90
80
70
60
50
40
30
0.09
20
0.08
0.07
Static Pressure Drop
0.06
0.05
10
0.04
9
8
0.03
7
6
5
0.02
ft/min:
m/s:
Model ECD-401 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.
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
200 300 400 500 600 700 800 900 1000 2000 3000
2345678910
Louver Width Inches
3
Intake
Exhaust
Free Air Velocity
3
)
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.
penetration for Model ECD-401 is 1018 fpm free area velocity.
These perfor mance ratings do not guarantee a louver to be weatherproof or stormproof and should be used in combination with other factors
including good engineering judgement in selecting louvers.
Air Leakage (with damper section closed)
Test size 48 in. x 48 in.
kPa
in. wg
2
0.475
0.45
0.425
1
0.9
0.4
0.8
0.7
0.375
0.6
0.35
0.5
0.4
0.325
Pressure
0.3
0.3
0.2
0.275
0.25
0.1
0.225
0.09
2
1 1.5 2 2.5 3 3.5 4 4.5 5
cfm/ft
2
cmh/m
20 25 30 35 40 45 50 55 60 65 70 75 80 85 90
Leakage
Water Penetration (Standard Air - .075 lb/ft
Test size 48 in. x 48 in. Test duration of 15 min.
The beginning point of water
*
3
)
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