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or suspended furnaces closer than 12- -in. (305 mm) to joists. The
sheet metal MUST extend underneath the furnace casing by 1- -in.
(25 mm) with the door removed.
The bottom closure panel on furnaces of widths 17- -1/2- -in. (445
mm) and larger may be used for flame roll- -out protection when
bottom of furnace is used for return air connection. See Fig. 25 for
proper orientation of roll- -out shield.
Fig. 22 - - Upflow Return Air Configurations and Restrictions
Fig. 23 - - Downflow Return Air Configurations
and Restrictions
24
ANY COMBINATION OF 1, 2, OR 3 PERMITTED.
A11036
A11037
Specifications subject to change without notice.
HORIZONTAL TOP
RETURN NOT
PERMITTED FOR
ANY MODEL
Fig. 24 - - Horizontal Return Air Configurations and
Restrictions
A11038
440 01 6101 00
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