a.Recommended Installation: slope toward vent terminal. See Figure 11.
b.Alternate Installation (where recommended installation is not practical): slope toward boiler. Horizontal vent drain tee (see Table 7 for part number) required. See Figure 12.
CAUTION
Moisture and ice may form on surfaces around vent terminal. To prevent deterioration, surfaces should be in good repair (sealed, painted etc.)
2.Vent terminal location restricted per following:
a.Minimum 12 inches above grade or normally expected snow accumulation level, or 7 feet above grade if located adjacent to public walkway. Do not install over public walkways or areas where local experience indicates condensate or vapor from Category III appliances creates a nuisance or hazard .
b.Minimum 3 feet above any forced air inlet located within 10 feet.
c.Minimum 1 foot below, 1 foot horizontally from, or 1 foot above any door, openable window, gravity air inlet, or building opening through which flue gases could enter any building (including adjacent buildings).
Figure 11: Recommended Horizontal Vent Installation
Figure 12: Alternate Horizontal Vent Installaltion
15
