ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 36

Miami-Dade NOA installation documents found on the
Miami-Dade product-control website. When there are
questions, always refer back to the manufacturer and
model-specifi c Miami-Dade NOA.
Design
What if fewer than the Miami-Dade-approved
number of panels (sections) are desired for a large
span? Maximum panel size is based on physical testing.
If a larger panel is desired, the louver manufacturer will
need to retest and revise the Miami-Dade NOA.
Which perform better, vertical-blade units or
horizontal-blade units? In the various AMCA waterpenetration
tests, including ANSI/AMCA Standard 550,
vertical-blade units usually outperform horizontal-blade
units. The reason is that vertical-blade units have gravity
working in their favor. Because of fewer horizontal planes
for water to come in contact with, there is less splashing.
How should pressure rating be determined based
PHOTO C. " Dual-module " louver.
on wind-speed maps? Though online calculators are
available, it is recommended that a professional engineer
be engaged to determine proper wind pressure.
Is there a maximum size for Miami-Dade louvers?
Miami-Dade does not specify a maximum size. In practice,
sizing is limited based on what the manufacturer
has tested and subsequently received approval for. Refer
to the Miami-Dade NOA for maximum-size details for a
specifi c model.
Does Miami-Dade approve non-rectangularly
shaped louvers? Yes, provided the louvers have been
tested and the shape and/or construction is included in
the manufacturer's Miami-Dade NOA.
Are there any purely horizontal-blade louvers
PHOTO D. Control damper mounted to the
rear of a horizontal louver. Above photographs
courtesy of Pottorff
that are ANSI/AMCA Standard 550 hurricaneresistant?
To date, no, but, where building aesthetics
are concerned, there are two ways a horizontal-blade
appearance and ANSI/AMCA Standard 550 compliance
can be achieved:
■
Using a " dual-module, " or " dual-bladed, " louver with
horizontal blades in the front and vertical blades in
the back (Photo C).
■
Mounting a control damper to the rear of a horizontal
louver (Photo D). Note that the damper must be in the
closed position to pass the ANSI/AMCA Standard 550
36
2021 AMCA inmot ion
www.amca.org
http://www.amca.org

ASHRAE Journal Supplement - AMCA InMotion - November 2021

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA InMotion - November 2021

Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - BB2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover1
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Contents
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 2
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 4
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 5
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 6
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 7
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 8
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 9
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 10
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 11
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 12
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 13
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 14
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 15
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 16
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 17
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 18
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 19
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 20
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 21
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 22
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 23
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 24
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 25
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 26
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 27
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 28
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 29
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 30
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 31
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 32
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 33
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 34
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 35
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 36
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 37
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 38
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 39
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 40
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 41
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 42
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 43
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - 44
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover3
ASHRAE Journal Supplement - AMCA InMotion - November 2021 - Cover4
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