Appendix

COLD AIR RETURN

FILTER BOX

TO EXISTING

DUCT WORK

WARM AIR

EXISTING

FURNACE

MODEL 1321

FURNACE

NOTE:

INSTALL GRAVITY-TYPE BACKDRAFT DAMPERS IN THE 8" ROUND HEAT OUTLET PIPES FOR SUPPLEMENTARY INSTALLS.

NOTE:

COMBINED STATIC PRESSURE IN OUTLET PLENUM MUST NOT EXCEED 0.25 INCHES WATER COLUMN WITH BOTH FURNACE'S FANS RUNNING.

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