Page 168 - 2018_IFGC

APPENDIX B

Table 504.3(2) is used where sizing single-wall vent connectors attached to a Table 504.3(4) is used where sizing single-wall metal vent connectors
Type B double-wall common vent. attached to a tile-lined masonry chimney.
Note: Each appliance can be either Category I draft hood equipped or fan- Note: “A” is the equivalent cross-sectional area of the tile liner.
assisted type. Note: Each appliance can be either Category I draft hood equipped or fan-
FIGURE B-7 assisted type.
VENT SYSTEM SERVING TWO OR MORE APPLIANCES FIGURE B-9
WITH TYPE B DOUBLE-WALL VENT AND MASONRY CHIMNEY SERVING TWO OR MORE APPLIANCES
SINGLE-WALL METAL VENT CONNECTORS WITH SINGLE-WALL METAL VENT CONNECTORS

Table 504.3(3) is used where sizing Type B double-wall vent connectors
attached to a tile-lined masonry chimney.
Asbestos cement Type B or single-wall metal pipe vent serving two or more
Note: “A” is the equivalent cross-sectional area of the tile liner.
draft-hood-equipped appliances [see Table 504.3(5)].
Note: Each appliance can be either Category I draft hood equipped or fan-
assisted type. FIGURE B-10
FIGURE B-8 ASBESTOS CEMENT TYPE B OR SINGLE-WALL
MASONRY CHIMNEY SERVING TWO OR MORE APPLIANCES METAL VENT SYSTEM SERVING TWO OR MORE
WITH TYPE B DOUBLE-WALL VENT CONNECTOR DRAFT-HOOD-EQUIPPED APPLIANCES

2018 INTERNATIONAL FUEL GAS CODE ® 155
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