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Page 2
OUTSIDE AIR INTAKE LOCATION
Proper design and location of the outside air intake location is critical in
ensuring that the Damper can safely and reliably provide an opening for
fresh air to enter the home. The following requirements for the location
of the outside air intake must be met:
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pliance vents, chimneys, plumbing stacks, and bathroom or kitchen
exhaust vents. If local codes have more stringent separation re-
quirements, they shall apply.
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blockage from snow or other debris such as leaves, and at a mini-
mum of 1’ above grade.
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rages, attics, adjacent dwelling units, or any enclosed part of the
building. The Damper should be installed to draw air directly from
outdoors.
OUTSIDE AIR INTAKE OPENING PROTECTION
Because the Damper, together with the end cap and outside air duct
which are installed with it, will allow outdoor air into the indoor environ-
ment, it is important to meet the following requirements:
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protective bird screens to keep out animals and outside debris.
Clean screens often and do not remove.
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must cover the entire opening of the outside air duct. This screen
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for the protection of openings in exterior walls, including steps to
prevent moisture intrusion around the opening.
Note that the screen over the outside air opening is not a filter. It is
intended to prevent the intake of leaves, animals, or debris into the out-
side air duct. A downstream filter is necessary to remove pollen, dust,
and other airborne particles. Potential filter locations are shown below
in the Typical Installations section.
MINIMUM RETURN AIR TEMPERATURE REQUIREMENTS
HVAC equipment manufacturers may have minimum requirements for
the air temperature in the return air plenum. Introducing outdoor air to
the return side of the central duct system may impact this temperature.
The installer should adjust both the size of the outside air duct and the
location of its connection to the return side of the central duct system in
a manner so that minimum air temperature requirements are satisfied
under design conditions.
PLAN THE INSTALLATION
Planning the installation first requires selecting the most appropriate
installation approach. The chart below offers suggestions for the most
effective installation approach by considering a few important factors.
Further details on the two main types of installations are provided below.
Yes
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House has central duct work?
Yes
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Return-air side of duct work is
accessible -either the return-air trunk
or return - air plenum?
Damper connected to
return side of central
duct system
No
No
Damper ducted directly
to a ceiling, floor, or wall
register
WHAT IS INCLUDED IN THE
PACKAGE
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- Transformer
- Pressure Switch Kit which includes:
- Pressure Switch
- Probe
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- Gasket
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TOOLS REQUIRED
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- Flathead or Phillips Screw Driver
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- Duct Tape
- Low Voltage Wire (2 Conductor)
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- Wire Nuts
