Filter
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Application
This air cleaner is used in forced air heating, cooling, and ventilating
systems. The air cleaner should be installed in the system such that all the
system air is circulated through the air cleaner. Maximum performance is
obtained with the system blower set for continuous operation.
Installation Requirements
The best location for the air cleaner is in the return air duct next to the
blower compartment. In this location, the blower motor and cooling coils
will be kept clean. Do not install the air cleaner in the discharge air duct.
Before installing the air cleaner, consider the application. If a transition
between the ductwork and air cleaner is required, refer to section entitled
Transitions, below. The unit must be readily accessible for periodic
inspection and replacement of the filter cartridge to maintain maximum
efficiency and trouble-free operation. A clean coil will reduce utility costs
by maintaining the coil’s efficiency. Failure to replace filter cartridge can
cause damage to the cooling system. Allow a minimum of 26” clearance in
front of the access panel for filter cartridge replacement.
Transitions
If the air duct does not fit the air cleaner cabinet opening, gradual
transitions are recommended to reduce air turbulence through the air
cleaner and maximize efficiency. Not more than 20° (about 4” per running
foot) of expansion should be used on each side of the transition fitting.
Air Flow
Air Flow
Furnace
Transition section
Air Cleaner
Air Cleaner
opening
Furnace
opening
Maximum 4" drop
per linear foot
Installation
5
Installation
4
TYPICAL MOUNTING POSITIONS
(Air cleaner shown shaded in illustrations)
Horizontal Furnace–
Mounted vertically in return
duct as close to the furnace
as possible.
Offset Installation– If there is less
than 7-in. for mounting the air
cleaner between the duct and the
furnace, move the return air drop.
Space Saver
Furnace
(Highboy)- Side
installation.
Mounted
vertically, where
return air enters
side inlet of
furnace.
Counterflow
Furnace–
Mounted
horizontally in
return duct–
just above the
furnace.
Basement Furnace
(Lowboy) -Mounted
horizontally in return
plenum– just above
the furnace.
Before making changes to a HVAC system
that may affect the ventilation of
fuel-burning appliances, contact your
heating contractor.
WARNING
Transitions
Before
After
Transitions