2. PROPER CHIMNEY HEIGHT:
The chimney shall terminate at least 3 feet above the highest point where it passes through the roof of a building and at least 2 feet higher than any portion of a building within a horizontal distance of 10 feet. (See Fig. 2a).
Fig. 2: Proper chimney termination height for pitched roofs
If the chimney penetrates a roof more than 10 feet from a ridge, wall or parapet, a minimum of 3 feet above roof or exit point must be maintained. See Figure 2b.
If the roof is flat rather than the normal residential pitched roof, refer to Figure 3 for proper clearances.
Fig. 3: Proper chimney termination height for flat roofs
3. PROPER VENT CONNECTOR PIPE/CHIMNEY CONNECTION:
The vent connector pipe should extend only to (and not beyond) the inside wall of the chimney (See Fig. 4). A thimble should be used to connect the vent connector pipe to the chimney so that the vent connector pipe may be readily removed in case of inspection or replacement.
Fig. 4: Proper insertion of the vent connector in the chimney.
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