ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 41

Overhead view of vertically oriented louver blades. Photograph courtesy of Aire Technologies Inc.
of 35, 70, 90, and 110 mph (15.6, 31.3, 40.2, and 49.2 m/s),
while water nozzles positioned between the fan and the
louver specimen simulate 8.8-in.- (223.5-mm-) per-hour
horizontal driving rain. Each test is performed for 15
min, with the exception of the 110-mph (49.2-m/s) test,
which is performed for 5 min. For a louver to pass an
ANSI/AMCA Standard 550 test, no more than 1 percent
of the total water sprayed may have penetrated the louver.
In the description of the louver test specimen in an
ANSI/AMCA Standard 550 test report, the position of the
blades-open or closed-will be noted, with the louver
receiving a " pass - fully open, " " pass - fully closed, " or
" fail " determination.
ANS I/AMCA Sta nd a r d
550 allows three types of test
specimens:
■
■
Stationary-blade louver.
Stationary-blade louver with
rear-mounted control damper.
■
Operable- (or combination-)
blade louver.
Louver Test Specimens
Engineered to capture and reject
rain at an acceptable rate without
the need to stop the fl ow of air
into a building, stationary-blade
louvers most commonly are
applied for intake and exhaust
www.amca.org
outside-air openings in critical or essential facilities where
louvers are required to be open for life-safety purposes,
such as providing a breathable atmosphere (as outlined
in Chapter 16 of the Florida Building Code). Critical or
essential facilities include hospitals, fi re stations, police
stations, and buildings where critical records are stored,
the construction requirements of which are outlined in
model and local codes. Increasingly, ANSI/AMCA Standard
550-rated louvers are being specifi ed for critical-application
facilities outside of high-velocity-hurricane-zone regions.
Stationary-blade louvers typically are horizontal-blade
louvers (Photo A), vertical-blade louvers (Photo B), or
PHOTO A. ANSI/AMCA Standard 550
high-velocity-rain-resistant horizontalblade
louver with rear-mounted control
damper, blades fully closed. Photograph
courtesy of Nailor Industries Inc.
PHOTO B. ANSI/AMCA Standard
550 high-velocity-rain-resistant
vertical-blade louver with blades
fully open. Photograph courtesy of Nailor
Industries Inc.
2022 AMCA inmot ion
41

http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - November 2022

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2022

ASHRAE Journal Supplement - AMCA InMotion - November 2022 - CT1
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - CT2
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 1
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 5
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 15
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 16
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 18
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 20
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 22
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 24
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 26
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 28
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 30
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 31
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 33
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 35
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ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 37
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 38
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 39
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 40
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 41
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 42
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 43
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - 44
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2022 - Cover4
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