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Section 15. Filters
15.1 Filter Considerations
• A filter must be installed within the system.
• A filter channel is provided in the unit, at the bot-
tom of the Blower/Filter compartment.
• For customer ease of fil ter maintenance, it is
recommended that a properly sized remote filter
grill(s) be installed for units that are difficult to
access. Airflow should not exceed the maximum
rated velocity of the filter being used.
Table 15.1 Filter Sizes
Cabinet Size*
A
Filter Size
16 x 20
* Cabinet size is indicated by the 7th digit in model number.
B
C
20 x 20
22 x 20
Filter in
air handler
cabinet
(Upflow
Application)
33
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