Greenheck EVH-201 Installation Manual

Wind-Driven Rain Louver

Vertical Blade

Application and Design

EVH-201 is a Wind-Driven Rain louver designed to protect
air intake and exhaust openings in building exterior walls that
are sensitive to direct water penetration. Design incorporates
a drainable head member and vertical rain resistant blades to
provide maximum resistance to wind driven rain in even the
most extreme weather conditions. The EVH-201 is an AMCA
CERTIFIED LOUVER enabling designers to select and apply
with confidence.

Standard Construction

Frame � � � � � � � � �Heavy gauge extruded 6063-T5 aluminum,

2 in. x 0.063 in. nominal wall thickness

Blades � � � � � � � � �Vertical rain resistant style, heavy gauge

extruded 6063-T5 aluminum, 0.063 in.
nominal wall thickness, positioned on
approximately 1 in. blade spacing

Construction . . . .Mechanically fastened

Birdscreen � � � � � �3/4 in. x 0.051 in. flattened expanded

aluminum in removable frame, inside
mount (rear)

Finish � � � � � � � � � �Mill

Sill Pan � � � � � � � �0.063 formed aluminum

Minimum Size � � �6 in. W x 12 in. H

Maximum Single
Section Size � � � �60 in. W x 96 in. H

EVH-201

WATER

PENETRATION

AIR

PERFORMANCE

WIND

DRIVEN RAIN

AIR
MOVEMENT
AND CONTROL
ASSOCIATION
INTERNATIONAL, INC.

®

Options (at additional cost)

• A variety of bird and insect screens

• Blank-off panel

• Clip angles

• Filter rack

• Flanged frame (head and jamb only)

• Security bars

• A variety of architectural finishes including:
Clear anodize
Integral color anodize
Baked enamel

Kynar

*Width and height dimensions furnished

approximately ¼ inch under size.

Static Pressure Drop

Wind-Driven Rain Performance

ORMANCE

DRIVEN RAIN

75 mm/h (3 in./hr) Rainfall &

13 m/s (29 mph) Wind Velocity

Free Area

Velocity

Ventilation Air

Core Velocity

Water

Penetration

(fpm) (m/s) (fpm) (m/s) Class Effective (fpm) (m/s) (fpm) (m/s) Class Effective

0 0 0 0 0 0 0 0

247 1.3 98 0.5 247 1.3 98 0.5

497 2.5 197 1.0 497 2.5 197 1.0

744 3.8 295 1.5 744 3.8 295 1.5

994 5.0 394 2.0 994 5.0 394 2.0

1241 6.3 492 2.5 1241 6.3 492 2.5

1491 7.6 591 3.0 1471 7.5 583 3.0 A 100.0

1718 8.7 681 3.5 A 100.0 1688 8.6 669 3.4 A 99.8

Discharge Loss Coefficient Class (Intake) = 3

Weather louvers shall be classified by their ability to reject simulated rain. The
table shows different classifications based on the maximum simulated rain

penetration per square meter (square feet) of louver. Water penetration rating

at a given louver face velocity is determined by the water penetration while
the louver is subjected to a selected simulated rainfall rate and wind velocity.

202 mm/h (8 in./hr) Rainfall &

22 m/s (50 mph) Wind Velocity

Free Area

Velocity

Ventilation Air

Core Velocity

Water

Penetration

EVH-201PERFORMANCE DATA

Wind-Driven Rain Louver

Extruded Aluminum

Discharge Loss Coefcient Classications

Class Discharge Loss Coefcient

1 0.4 and Above Class Effectiveness

2 0.3 to 0.399 A 1 to 0.99

3 0.2 to 0.299 B 0.989 to 0.95

4 0.199 and Below C 0.949 to 0.80

Greenheck Fan Corporation certifies

that the EVH-201 louvers shown
herein are licensed to bear the

WATER

AMCA Seal. The ratings shown are

PENETRATION

AIR

PERF

AIR
MOVEMENT
AND CONTROL
ASSOCIATION
INTERNATIONAL, INC.

based on tests and procedures

WIND

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, water penetration, and wind­driven rain ratings.

Wind-driven Rain

Penetration Classes

D Below 0.80

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

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

200 300 400 500 600 700 800 900 1000 2000 3000

3

Intake

Exhaust

2345678910

3

)

Free Air Velocity

Model EVH-201 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

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

Water Penetration per Unit Free Area

0.00

0

ft/min:

m/s:

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

0.01 oz. of water (penetration) per sq. ft. of louver free area. *The
beginning point of water penetration for Model EVH-201 is
above 1250 fpm free area velocity. These performance 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.

Test Period 15 minutes

Standard Air - .075 lb/ft

1100 1150 1200 1250 1300

6.5 7.0 7.5

3

Free Area Velocity