35
Venting Notes for Fig. 37--49
1. For common vent, vent connector sizing and vent material: United States----use the NFGC Canada----use the CAN/CSA-- B149.1-- 05
2. Immediately increase to 5--inch or 6-- inch vent connector outside furnace casing when 5--inch vent connector is required, refer to Note
1 above.
3. Side outlet vent for upflow and downflow installations must use Type B vent immediately after exiting the furnace, except when
KGAVG0101DFG, Downflow Vent Guard Kit, is used in the downflow position.
4. Type--B vent where required, refer to Note 1 above.
5. Four--inch single-- wall (26 ga. min.) vent must be used inside furnace casing and when the KGAVG0101DFG Downflow Vent Guard
Kit is used external to the furnace.
6. Accessory Downflow Vent Guard Kit, KGAVG0101DFG required in downflow installations with lower vent configuration.
7. Chimney Adapter Kit may be required for exterior masonry chimney applications. Refer to Chimney Adapter Kit, KGACA02014FC
or KGACA02015FC, for sizing and complete application d etails.
8. Secure vent connector to furnace elbow with (2) corrosion--resistant sheet metal screws, spaced approximately 180_ apart.
9. Secure all other single wall vent c onnector joints with (3) corrosion resistant screws spaced approximately 120_ apart. Secure Type--B
vent connectors per vent connector manufacturer’s recommendations.
10. The total height of the vent and connector shall be at least seven feet for the 154,000 Btuh gas input rate model when installed in a
downflow application with furnace elbow turned to left side with the connector elbow outside furnace casing pointing upward. (See
Fig. 39.)
315A
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