TJERNLUND PAI-3,PAI-4,PAI-5, PAI-6,PAI-7 User Manual
Insufficient combustion air causes:
Flue gas spillage, flame roll-outs, decreased
efficiencies, and reduced heating equipment life.
Conventional metal louvers
often are a major cause of
these problems:
Unregulated outdoor air supply
that changes with temperatures,
speed and direction of winds.
Architecturally unsightly large
outside wall openings that often
require structural reinforcement.
Mechanical room freeze ups in
northern climates.
Often not compatible with below grade or
interior mechanical rooms.
Tjernlund In-Forcer combustion air intakes
are packaged systems engineered to provide
controlled, interlocked combustion air.
Wall or roof opening size can be reduced by up
to 80% compared to conventional metal louvers.
In-Forcers include
matching, low profile
intake hoods that can
be mounted on either
a roof or sidewall.
Use small diameter
duct to deliver outdoor air up to 100 feet
away from intake hood.
Complies with Mechanical
Code requirements for combustion air supply.
Use in virtually all mechanical
room locations
The IN-FORCER can be ducted up to 100 equivalent feet from the intake
hood. Even isolated mechanical rooms can easily be supplied with outdoor
combustion air. Cold outdoor air can be distributed through standard
ducts and diffusers at ceiling level, allowing the air to be tempered as it
drops to the floor, eliminating cold spots in the mechanical room.
Mechanical room noise transfer to the outside is further reduced since
there is no direct wall opening, typical of standard air intake louvers.
Variety of applications
■ Restaurant kitchens with negative pressure
caused by exhaust fans
■ Interior mechanical rooms with no direct
access to an outside wall
■ Conversions from electricto gas or oil
heating appliances
Duct air from roof
top for interior
mechanical rooms
Intake direct
thru outside
wall
Run horizontal
duct up to 100
feet
Compared to standard louvers, wall openings can be reduced by
up to 80%. This eliminates the need for extra support around
the opening that can cost far more in extra construction labor
and materials than the total installed cost of an IN-FORCER.
What’s more, IN-FORCER’S low profile hood blends into a
sidewall or roofline and is designed to keep wind and rain
out. Heavy duty 5052 aluminum construction will not corrode.
Small wall opening
lowers installation cost
■ Improves building’s
exterior appearance
The original and most
practical alternative
to metal louvers
BY TJERNLUND
Support beams are
typically required on
larger louvered intakes
IN-FORCER requires
maximum 12'' opening
and no extra support
sidewall mounted hood roof mounted hood
■ Confined space installations
■ Below grade mechanical rooms
■ Factories where processes cause backdrafting
of heating equipment
■ Laundries, dry cleaners, indoor pools, etc.
with chemically contaminated atmosphere
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