ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 22

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BY THE AMCA FIRE/SMOKE DAMPER TASK FORCE

Fire Dampers, Smoke Dampers and
Combination Fire/Smoke Dampers:

The Difference is Important

When people think of fire protection, they
are often envisioning active fire protection
systems like smoke detectors, fire alarms,
sprinklers, exit signs and evacuation plans.
While these are all important, active fire
protection systems do not prevent the
leading cause of death from fire: the spread
of smoke and toxic gases.

T

he most effective fire protection plans include detection, suppression and containment. This requires both
active and passive life safety fire protection. Passive fire
protection - including fire dampers, smoke dampers and
combination fire/smoke dampers - are designed to prevent
the spread of killers like smoke and toxic gases.
Fire dampers, smoke dampers and combination fire/smoke
dampers all perform different functions. They are installed
and maintained differently as well. Knowledge of these differences is imperative to their proper application and to
ensuring their performance in a life-safety system.
FIRE DAMPERS

A fire damper's primary function is to prevent the passage
of flame from one side of a fire-rated separation to the other.
It is installed in an air distribution system. If the duct temperature reaches a high enough level to activate the heat
response device (rated for 160°F up to 212°F) that holds the
blades open, it will automatically close, preventing the flame
from moving into an adjoining compartment.
There are two types of applications for fire dampers: static
22

Fall 2017

Figure 1: Example of a curtain-blade fire damper with
fusible link and factory integral sleeve. Image courtesy of Ruskin.
and dynamic. Static fire dampers can only be applied in HVAC
systems that are designed to shut down in the event of a fire.
Dynamic fire dampers have been tested for closure under
airflow and carry both an airflow velocity (fpm) and pressure
differential rating.
In addition to the two applications, fire dampers are also
available in two basic designs: curtain type and multi-blade
type. Curtain-type dampers are the most common and consist
of a steel "curtain" held open by a fusible link. Multi-blade
dampers are similar to air control dampers with "blades" located

A M C A I N T E R NAT I O NA L

inmotion

W W W. A M C A . O R G

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http://WWW.AMCA.ORG

Table of Contents for the Digital Edition of ASHRAE Journal Supplement - AMCA inmotion - Fall 2017

Contents
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - BB1
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - BB2
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - Cover1
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - Cover2
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - Contents
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 2
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 3
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 4
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 5
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 6
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 7
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 8
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 9
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 10
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 11
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 12
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 13
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 14
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 15
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 16
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 17
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 18
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 19
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 20
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 21
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 22
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 23
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 24
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 25
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 26
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 27
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 28
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ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 30
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 31
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 32
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 33
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 34
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 35
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - 36
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - Cover3
ASHRAE Journal Supplement - AMCA inmotion - Fall 2017 - Cover4
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