Air Filter (Not Factory-Installed) - Bosch BCA Series Installation Instructions Manual

Installation Instructions

9 Air Filter (Not Factory-Installed)

Filters are not included with the unit and must be field supplied.
All return air must be filtered. The unit can be installed with or without a return-air
duct. When installed as a ducted return, an insulated cover for the bottom casing
opening must be field supplied. When installed without return-air duct (free return
application), the space housing of the unit must be fully sealed except for the the
return air connection to the conditioned space. Air filters should be located at the
return air openings to the unit.
If adding high efficiency filters or electronic air filtration systems, it is very
important that the air flow is not reduced. If air flow is reduced the overall
performance and efficiency of the unit will be reduced. It is strongly recommended
that a professional installation technician is contacted to ensure such filtration
systems are installed correctly.
Do not double filter the return air duct system. Do not filter the supply
air duct system. This will change the performance of the unit and reduce
airflow.
WARNING: FIRE HAZARD
Do not operate the system without filters. A portion of the dust
suspended in the air may temporarily lodge in the duct runs and at
the supply registers. Any circulated dust particles could be heated
and charred by contact with the air handler elements. This residue
could soil ceilings, walls, drapes, carpets and other articles in the
house. Soot damage may occur with filters in place, when certain
types of candles, oil lamps or standing pilots are burned.
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Bosch BCA Series Air Handler - BTC 761703106 A (03.2023)