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IMPORTANT SAFETY INSTRUCTIONS

READ AND SAVE THESE INSTRUCTIONS

WARNING: TO REDUCE THE RISK OF FIRE, ELECTRIC
SHOCK, OR INJURY TO PERSONS, OBSERVE THE
FOLLOWING:
■ Use this unit only in the manner intended by the
manufacturer. If you have questions, contact the
manufacturer at the address or telephone number listed in
this document.
■ Before servicing or cleaning the unit, switch power off at
service panel and lock the service disconnecting means to
prevent power from being switched on accidentally. When
the service disconnecting means cannot be locked,
securely fasten a prominent warning device, such as a tag,
to the service panel.
■ Installation work and electrical wiring must be done by
qualified person(s) in accordance with all applicable codes
and standards, including fire-rated construction codes and
standards.
■ Sufficient air is needed for proper combustion and
exhausting of gases through the flue (chimney) of fuel
burning equipment to prevent back drafting. Follow the
heating equipment manufacturer's guideline and safety
standards such as those published by the National Fire
Protection Association (NFPA), the American Society for
Heating, Refrigeration and Air Conditioning Engineers
(ASHRAE), and the local code authorities.
■ When performing installation, servicing or cleaning the unit,
it is recommended to wear safety glasses and gloves.
■ When cutting or drilling into wall or ceiling, do not damage
electrical wiring or other hidden utilities.
■ Ducted fans must always be vented outdoors.
■ This unit is not designed to provide combustion air for fuel
burning appliances.
■ Do not connect the unit directly to a combustion appliance
of any type.
■ During extreme weather events including snow storms,
ensure that the intake area for the outside air duct is not
blocked and able to provide a clear pathway for outside air
to enter the system.
WARNING: TO REDUCE THE RISK OF FIRE, USE ONLY
METAL DUCTWORK.
CAUTION: For general ventilating use only. Do not use to
exhaust hazardous or explosive materials and vapors.
CAUTION: To reduce risk of fire and to properly exhaust
air, be sure to duct air outside - do not vent exhaust air into
spaces within walls or ceilings, attics or into crawl spaces, or
garages.
■ When notching or drilling into framing including floor
supports, rim joists, and wall studs, comply with code and
manufacturer limitations on allowable modifications to these
structural members.
■ This unit is intended to be installed within the home in a
location protected from moisture.
■ This unit must be in an accessible location which allows for
inspection of the unit.
■ When federal, provincial or state legislation comprises more
restrictive installation and/or certification requirements, the
aforementioned requirements prevail on those of this
document and the installer agrees to conform to these at
his own expense.

CAUTION:

■ Do not locate outside air inlet near hazardous materials or
explosives.
■ Unit shall not be installed to introduce air from crawl
spaces, garages, attics, adjacent dwelling units, or other
locations within the building shell. Unit shall be installed to
introduce air directly from outdoors.
■ Do not run the outside air duct directly above or closer than
2 ft (0.6 m) to any furnace or its supply plenum, boiler, or
other heat producing appliance.
■ Any ductwork used in conjunction with the damper must be
installed in compliance with all local and national codes that
are applicable.
■ Do not operate the damper for fresh air introduction until all
system filters, including the central duct system filter, have
been installed per the system design.
■ Please read the unit specification label on the product for
further information and requirements.
■ The damper’s outdoor air intake, ducting, and any filters
should be inspected and maintained on a regular basis.
■ Insulate the duct and damper to prevent build-up of
condensation in cold weather climates. Vapor barriers on
both sides of insulation are recommended.