ASHRAE Journal - March 2021 - 84

The Role of Louvers in
Combating Infectious Aerosol
Transmission in Buildings
By: James Livingston, Sales and Application Manager, RuskinĀ®

W

ith the arrival of the COVID-19 pandemic, building
managers and HVAC designers have been challenged to
provide a comfortable indoor environment that is as safe
as possible for its occupants. A recently published document from
ASHRAE offers several strategies for the design and operation of
HVAC systems that may help reduce infectious aerosol transmission.
Among the strategies identified, increasing outside air ventilation
and running HVAC systems longer (around the clock, if possible)
are suggested for indoor air dilution and replacement.
Bringing in the Air-Not the Water
For systems that use intake louvers, increased airflow and longer
operation cycles could increase water penetration through existing
louvers, causing building damage and indoor air quality issues.
Retrofitting with more efficient louvers might be a consideration.
For new systems, proper louver selection is vital in designing an
effective HVAC system.
Wind-driven rain resistant louvers like the RuskinĀ® HZ700 double
frame extreme performance louver can provide superior rain
protection, making them some of the best choices for new system
designs and retrofits. AMCA 500-L wind-driven rain Class A rated
louvers like the HZ700 allow only a few ounces of water penetration
in an hour vs. several gallons through a traditional, drainable louver
in storm conditions.

Ruskin offers a wide variety of high-performance
solutions for wind-driven rain. The HZ700 is
a double frame, extreme performance louver
featuring a horizontal front blade design for
architecturally pleasing aesthetics.

Wind-driven rain louvers are available in horizontal and vertical blade models. Horizontal models can often be sized comparably
to traditional louvers for a given airflow with similar pressure drop and high rain rejection effectiveness. Vertical blade models that
provide the best rain resistance and lowest pressure drop usually will handle the highest air volumes through a given size. For the
most demanding applications, AMCA 550 compliant models are available, providing 99% rain rejection effectiveness when subjected
to hurricane-level wind and rain conditions.
Selecting the Right Louver
Providing constant airflow and outside air circulation while keeping water out of a building reduces damage and limits the opportunity
for mold and dampness. Both of these are proven to be negative contributors to indoor air quality (IAQ). Referencing ASHRAE
Position Document on Infectious Aerosols, additional moisture in the air system can also rehydrate and propagate infection.
Utilizing wind-driven rain resistant louvers for HVAC system intakes offers the highest airflow capacity for increased dilution and
minimizes water infiltration for building protection and acceptable indoor air quality. AMCA offers Certified Ratings and Listed
Label programs that verify the published performance of louvers. Specifying louvers with these credentials is highly recommended
for all louver applications.
Visit AMCA.org to see certified and listed louver models and access the testing standards documents referenced in this article.
Or visit ruskin.com to learn more about Ruskin wind-driven rain resistant louvers and other high-performance products.

ruskin@ruskin.com | 816-761-7476 | ruskin.com


http://www.AMCA.org http://www.ruskin.com http://www.ruskin.com

ASHRAE Journal - March 2021

Table of Contents for the Digital Edition of ASHRAE Journal - March 2021

Contents
ASHRAE Journal - March 2021 - Intro
ASHRAE Journal - March 2021 - Cover1
ASHRAE Journal - March 2021 - Cover2
ASHRAE Journal - March 2021 - 1
ASHRAE Journal - March 2021 - Contents
ASHRAE Journal - March 2021 - 3
ASHRAE Journal - March 2021 - 4
ASHRAE Journal - March 2021 - 5
ASHRAE Journal - March 2021 - 6
ASHRAE Journal - March 2021 - 7
ASHRAE Journal - March 2021 - 8
ASHRAE Journal - March 2021 - 9
ASHRAE Journal - March 2021 - 10
ASHRAE Journal - March 2021 - 11
ASHRAE Journal - March 2021 - 12
ASHRAE Journal - March 2021 - 13
ASHRAE Journal - March 2021 - 14
ASHRAE Journal - March 2021 - 15
ASHRAE Journal - March 2021 - 16
ASHRAE Journal - March 2021 - 17
ASHRAE Journal - March 2021 - 18
ASHRAE Journal - March 2021 - 19
ASHRAE Journal - March 2021 - 20
ASHRAE Journal - March 2021 - 21
ASHRAE Journal - March 2021 - 22
ASHRAE Journal - March 2021 - 23
ASHRAE Journal - March 2021 - 24
ASHRAE Journal - March 2021 - 25
ASHRAE Journal - March 2021 - 26
ASHRAE Journal - March 2021 - 27
ASHRAE Journal - March 2021 - 28
ASHRAE Journal - March 2021 - 29
ASHRAE Journal - March 2021 - 30
ASHRAE Journal - March 2021 - 31
ASHRAE Journal - March 2021 - 32
ASHRAE Journal - March 2021 - 33
ASHRAE Journal - March 2021 - 34
ASHRAE Journal - March 2021 - 35
ASHRAE Journal - March 2021 - 36
ASHRAE Journal - March 2021 - 37
ASHRAE Journal - March 2021 - 38
ASHRAE Journal - March 2021 - 39
ASHRAE Journal - March 2021 - 40
ASHRAE Journal - March 2021 - 41
ASHRAE Journal - March 2021 - 42
ASHRAE Journal - March 2021 - 43
ASHRAE Journal - March 2021 - 44
ASHRAE Journal - March 2021 - 45
ASHRAE Journal - March 2021 - 46
ASHRAE Journal - March 2021 - 47
ASHRAE Journal - March 2021 - 48
ASHRAE Journal - March 2021 - 49
ASHRAE Journal - March 2021 - 50
ASHRAE Journal - March 2021 - 51
ASHRAE Journal - March 2021 - 52
ASHRAE Journal - March 2021 - 53
ASHRAE Journal - March 2021 - 54
ASHRAE Journal - March 2021 - 55
ASHRAE Journal - March 2021 - 56
ASHRAE Journal - March 2021 - 57
ASHRAE Journal - March 2021 - 58
ASHRAE Journal - March 2021 - 59
ASHRAE Journal - March 2021 - 60
ASHRAE Journal - March 2021 - 61
ASHRAE Journal - March 2021 - 62
ASHRAE Journal - March 2021 - 63
ASHRAE Journal - March 2021 - 64
ASHRAE Journal - March 2021 - 65
ASHRAE Journal - March 2021 - 66
ASHRAE Journal - March 2021 - 67
ASHRAE Journal - March 2021 - 68
ASHRAE Journal - March 2021 - 69
ASHRAE Journal - March 2021 - 70
ASHRAE Journal - March 2021 - 71
ASHRAE Journal - March 2021 - 72
ASHRAE Journal - March 2021 - 73
ASHRAE Journal - March 2021 - 74
ASHRAE Journal - March 2021 - 75
ASHRAE Journal - March 2021 - 76
ASHRAE Journal - March 2021 - 77
ASHRAE Journal - March 2021 - 78
ASHRAE Journal - March 2021 - 79
ASHRAE Journal - March 2021 - 80
ASHRAE Journal - March 2021 - 81
ASHRAE Journal - March 2021 - 82
ASHRAE Journal - March 2021 - 83
ASHRAE Journal - March 2021 - 84
ASHRAE Journal - March 2021 - 85
ASHRAE Journal - March 2021 - 86
ASHRAE Journal - March 2021 - 87
ASHRAE Journal - March 2021 - 88
ASHRAE Journal - March 2021 - 89
ASHRAE Journal - March 2021 - 90
ASHRAE Journal - March 2021 - 91
ASHRAE Journal - March 2021 - 92
ASHRAE Journal - March 2021 - 93
ASHRAE Journal - March 2021 - 94
ASHRAE Journal - March 2021 - 95
ASHRAE Journal - March 2021 - 96
ASHRAE Journal - March 2021 - 97
ASHRAE Journal - March 2021 - 98
ASHRAE Journal - March 2021 - 99
ASHRAE Journal - March 2021 - 100
ASHRAE Journal - March 2021 - 101
ASHRAE Journal - March 2021 - 102
ASHRAE Journal - March 2021 - 103
ASHRAE Journal - March 2021 - 104
ASHRAE Journal - March 2021 - Cover3
ASHRAE Journal - March 2021 - Cover4
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_VJKSRY
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDHUTC
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JPPKRR
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SDLTTH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_CKLLES
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_SLDOX
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_HJETUK
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_OLUHGE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2020october_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ZERDGH
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_QVMNEO
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_RTPOKE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_BBATRE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_STUBMW
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TPEMPE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_JNMKDS
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_FBTTPA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_WQMMNE
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_TVBRYN
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2020
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_KTUZMA
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_ABEDGD
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201910
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201909
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019septmeber_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2019september
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201908
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201907
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201906
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201905
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201904
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019april
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201903
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2019march
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201902
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201901
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_showguide2019
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018december
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018november
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2018fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_2018october
https://www.nxtbook.com/nxtbooks/ashrae/ashraemexico_2018
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201810
https://www.nxtbook.com/nxtbooks/ashrae/ashraeinsights_201806
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201805
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201804
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201803
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201712
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201711
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201710
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2017fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201709
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201705
https://www.nxtbook.com/nxtbooks/ashrae/ashrae_meetinginsert_201610
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2016fall
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acrexindia
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_amca_2015summer
https://www.nxtbook.com/nxtbooks/amca/2014summer2
https://www.nxtbook.com/nxtbooks/amca/2014summer
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acma_2014summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201311
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201309
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_acmasupp_2013fall
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201305
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201303
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2013winter
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201211
https://www.nxtbook.com/nxtbooks/ashrae/achr_expo_mexico2012
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201209
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v3
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201208_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201205
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201203
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2012winter
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201111_v2
https://www.nxtbook.com/nxtbooks/ashrae/ashraejournal_201109_v2
https://www.nxtbook.com/nxtbooks/ashrae/pubcatalog_2011summer
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201105
https://www.nxtbook.com/nxtbooks/ashrae/meetingplanner_201103
https://www.nxtbookmedia.com