Thermo Products MO-425 manual Proper Chimney Height, Proper Vent Connector Pipe/Chimney Connection

Models: MO-425

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3. PROPER CHIMNEY HEIGHT:

All installations and services must be performed by qualified service personnel.

3. 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

4. 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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Thermo Products MO-425 manual Proper Chimney Height, Proper Vent Connector Pipe/Chimney Connection