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Transitions
For most efficient air cleaning, spread airflow evenly
across the face of the media. If the duct is a different
size than the media air filter cabinet, gradual transitions
are required. Follow these guidelines when fabricating:
• Use gradual transitions to reduce air turbulence and
increase efficiency.
• Use no more than 20 degrees (about 4 in. per
running ft. (100 mm per 300 linear mm)) of
expansion on each side of a transition fitting.
Turning Vanes
If the media air cleaner is installed next to an elbow
or angle fitting, add turning vanes inside the angle to
distribute airflow more evenly across the face of the
media. See middle figure.
Sheetmetal
The media air cleaner is adaptable to all new or
existing forced air heating and cooling systems used
in residential applications. Transitions or turning vanes
may be required in some applications for effective
media air cleaner operation.
Offsets
If the duct connection to the furnace in a side
installation allows less than 7 in. (178 mm) for mounting
media air cleaner cabinet, attach an offset to the elbow.
See bottom figure at right.
4
DUCT SIZE CHANGED GRADUALLY TO PREVENT TURBULENCE.
20 DEGREE EXPANSION PER SIDE PER
FITTING (4 IN. PER RUNNING FOOT
[100 MM PER 300 LINEAR MM])
RETURN AIR
DUCT
TRANSITION FITTING
ELECTRONIC AIR CLEANER CABINET
LESS
THAN
7 in.
(178 mm)
1 REQUIRED TURNING VANES HELP DISTRIBUTE AIRFLOW EVENLY.
F100 Media Air Cleaner 68-0239EF—06
M947B
TURNING
VANES
M5651
OFFSET
AT LEAST
7 in.
1
(178 mm)
M948B
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