SBN71-120 thru 85-390, SBD30-150/199 TANK TYPE COMMERCIAL
GAS WATER HEATER SERVICE HANDBOOK
9 RULES FOR GOOD VENTING
HORIZONTAL
ELEMENTS LIMITED TO 75% OF TOTAL VERTICAL HEIGHT
7.Horizontal elements should be limited to 75% of the vertical rise of the vent above the connection.
VENT RUNS
BEYOND EXTERIOR
WALLS OR INTO
UNHEATED AREAS
SHOULD BE
DOUBLE WALL.
8.Flue gases must be kept hot for proper venting. Single wall vent exposed to cold air may not vent properly.
9.Obstructions can cause down drafts. The vent pipe should be extended to meet local
codes.
State Water Heaters | 22 | Technical Training Department |
Ashland City, Tennessee © 2007 |
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