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RETURN AIR FILTERS FOR FURNACE IN HORIZONTAL
CONFIGURATION
When the modular blower is installed in the horizontal configuration,
the return air filters must be installed exterior to the modular blower
cabinet. Remote filter grilles may be used for homeowner
convenience, refer to
Figure 4, p. 57
the duct work upstream of the modular blower, refer to
Figure 5, p.
57.
Filter kits are available for horizontal applications.
Note: Direct coupled side returns are not allowed to the blower
cabinet.
TYPICAL DOWNFLOW FURNACE RETURN AIR FILTER
INSTALLATIONS
Filters are not factory supplied for downflow furnaces. Filter size
needed will be dependent on type of filter and CFM requirement.
Filters must be installed externally to the unit.
S9V2-VS-SVX001-1C-EN
or the filters may be installed in
F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n
Figure 4. Remote Filter Installation
Figure 5. Duct Filter Installation
Downflow Return Air Filters
Furnace Width
17–1/2"
21"
24–1/2"
Filter
Qty and Size
2 — 14" x 20" x 1"
2 — 16" x 20" x 1"
2 — 16" x 20" x 1"
57
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