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IMPORTANT
DO NOT DOUBLE FILTER THE RETURN AIR DUCT SYSTEM. DO NOT FILTER THE SUPPLY AIR DUCT
SYSTEM.THIS WILL CHANGE THE PERFORMANCEOF THE UNIT AND REDUCE AIRFLOW .
Do not operate the system without filters. A portion of the dust entrained 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.
9. Filter installation dimensions
22
Note: Air filter is factory
supplied (optional)
Fig 6 External filter base
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