AMCA InMotion - September 2019 - 15

Air-curtain system installed over revolving doors.

Image courtesy of Berner International

of infi ltration rates through high-use automatic doors.1

study conducted by Pacific Northwest National Labora-

Through laboratory-scale experiments, Yuill calculated

tory,3 energy-modeling software was used to determine air

discharge coefficient for 15 different configurations of single

pressure, infiltration, and annual building energy use and

and vestibule entrance doors. Additionally, he conducted

loss with automatic doors, air curtains, and vestibules in

field studies to record door operation characteristics. The

a three-story medium U.S. Department of Energy (DOE)

project produced a series of simplified equations and figures

reference commercial office building. In this analysis, air

that can be used to estimate infiltration through entrance

curtains allowed less infiltration than vestibules and much

doors of buildings.

less than single doors. The final result was a reduction in
total building energy use by a factor of 0.3 to 2.2 percent.

Early Energy Studies

The study found that in all of the climate zones in which

In the first AMCA-commissioned study, "Investigation of

ANSI/ASHRAE/IES 90.1 and the IECC required vestibules, an

the Impact of Building Entrance Air Curtain on Whole

air curtain was equally effective or better at saving energy.

Building Energy

Use,"2

in 2013, Liangzhu (Leon) Wang,

PhD, associate professor of building, civil, and environ-

Recent Energy Studies and Validation

mental engineering at Concordia University, conducted

In recent years, two more studies have been commissioned by

computational-fluid-dynamics (CFD) and whole-building

AMCA and completed by Concordia University. Considering

energy-modeling analysis, finding that an air curtain

the first study was primarily numerical and conducted for

significantly reduced air infi ltration across a building-

one building without people in the doorway, it was deter-

entrance door under various changes in pressure.

mined the next steps would be to test additional buildings,

In exact adherence to the methodologies of a 2010

w w w. a m c a .o r g

account for wind and people, and validate the methodology.

20 19 A M CA i n m o t i o n

15


http://www.amca.org

AMCA InMotion - September 2019

Table of Contents for the Digital Edition of AMCA InMotion - September 2019

Contents
AMCA InMotion - September 2019 - BB1
AMCA InMotion - September 2019 - BB2
AMCA InMotion - September 2019 - Cover1
AMCA InMotion - September 2019 - Cover2
AMCA InMotion - September 2019 - Contents
AMCA InMotion - September 2019 - 2
AMCA InMotion - September 2019 - 3
AMCA InMotion - September 2019 - 4
AMCA InMotion - September 2019 - 5
AMCA InMotion - September 2019 - 6
AMCA InMotion - September 2019 - 7
AMCA InMotion - September 2019 - 8
AMCA InMotion - September 2019 - 9
AMCA InMotion - September 2019 - 10
AMCA InMotion - September 2019 - 11
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AMCA InMotion - September 2019 - 15
AMCA InMotion - September 2019 - 16
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AMCA InMotion - September 2019 - 19
AMCA InMotion - September 2019 - 20
AMCA InMotion - September 2019 - 21
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AMCA InMotion - September 2019 - Cover3
AMCA InMotion - September 2019 - Cover4
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