Prefabricated Chimneys, Chimney Height

Prefabricated Chimneys

A prefabricated metal chimney must be one tested and listed for use with solid-fuel burning appliances to the High-Temperature (H.T.) chimney Standard UL-103- 1985 (2100°F.) for the United States, and High Tem- perature (650°C) Standard ULC S-629 for Canada.

Chimney Height

For proper draft and good performance, the chimney should extend at least 16' (5m) above the flue collar of the stove.

The chimney must also extend at least 3' (900 mm) above the highest point where it passes through a roof, and at least 2' (600mm) higher than any portion of a building within 10' (3m). (Fig. 3)

DO NOT CONNECT THIS UNIT TO A CHIMNEY FLUE SERVING ANOTHER APPLIANCE.

	0 To 10Õ
	2Õ Min.
	3Õ	0 To 10Õ
	Min.
		2Õ Min. 3Õ
		Min.
	Reference
	Point	AC617
		AC617
Fig. 3	The 2/3/10 rule for chimneys.

Chimney Size

A Seneca is approved for venting into a masonry chimney with a nominal flue size of 8Ó x 8Ó (200 x 200mm), and into a round flue size of 8Ó (200mm).

It may vented into larger chimneys as well. However, chimneys with liners larger than 8Ó x 12Ó (200 x 300mm) my experience rapid cooling of smoke and reduction in draft, especially if these chimneys are located on the homeÕs exterior. These large chimneys may need to be insulated or may need to have their flues relined for proper stove performance.

Accessories to help make the connection between stainless steel chimney liners and the stove are avail- able through your local dealer.

Dutchwest Seneca

WARNING: Do not use double-wall chimney con- nectors with the Seneca unless they have been specifically tested and listed for use with this appliance. Use of double-wall chimney connectors that have not been tested and listed for use with the Seneca may result in temperatures exceeding the limits established by the test standards ANSI/UL- 1482 or ULC S627. A potential hazard may result, including a house fire.

Chimney Connector Guidelines

The chimney connector is the single-wall pipe that connects the stove to the chimney. The chimney itself is a masonry or prefabricated structure that encloses the flue. Chimney connectors are used only to make the connection from the stove to the chimney.

Do not pass the chimney connector through a combus- tible wall or ceiling, or through an attic, a closet or any similar concealed space. If passage through a combus- tible wall is unavoidable, follow the recommendations in the following section on Wall Pass-Throughs.

The single-wall chimney connector should be made of 24 gauge or heavier steel, and may be either 6Ó (150mm) or 8Ó (200mm) in diameter.

Install the chimney connector not less than 18" (450

mm)from the ceiling. Keep the passage as short and direct as possible, with no more than two 90 degree turns. Slope horizontal runs of connectors upward 1/4Ó per foot (20mm per meter) going from the stove toward the chimney. The recommended maximum length of horizontal run is 3 feet (1m), and the total length of chimney connector should be no longer than 8 feet (2.5m).

In cathedral ceiling installations, extend the prefabri- cated chimney downward to within 8 feet (2.5 meters) of the stove. The entire chimney connector should be exposed and accessible for inspection and cleaning.

Do not use galvanized chimney connector; it cannot withstand the high temperatures that can be reached by smoke and exhaust gases and it may release toxic fumes under high heat.

Assembling the Chimney Connector

SAFETY NOTE: Always wear gloves and safety goggles when drilling, cutting or joining sections of chimney connector.

•Beginning at the flue collar of the stove, assemble the chimney connector. Insert the first crimped end into the stoveÕs flue collar, and keep each crimped end pointing toward the stove. Using the holes in the flue collar as guides, drill 1/8Ó (3m) holes in the bottom of the first section of chimney connector and

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