Vermont Casting 1655, 1659 Connection Above the Fireplace, Wall Pass-throughs, U.S. Requirements

Connection Above the Fireplace

In this installation, the chimney connector enters the fireplace flue through a thimble located above the fireplace. (Fig. 6) The liner of the fireplace chimney should extend at least to the point at which the chimney connector enters the chimney. Follow all the guidelines for installing a chimney connector into a freestanding masonry chimney, and pay special attention to these additional points:

•The stove and chimney connector clearances to combustible mantel and trim materials are the same as clearances to combustible walls. If necessary, use a combination of mantel, trim, and connector heat shields to provide the required clearances. Refer to Page 12.

•Double-check connector clearance to the ceiling.

•The fireplace damper must be closed and sealed to prevent room air from being drawn up the flue which could reduce performance. However, it must be possible to reopen the damper to inspect or clean the chimney.

•Floor protection requirements also apply to fireplace installations.

Wall Pass-throughs

Whenever possible, design the installation so that the connector does not pass through a combustible wall. If you must include a wall pass-through in your instal- lation, check with your building inspector before you begin. Also check with the chimney connector manu- facturer for any specific requirements.

Consult with your dealer regarding special connection components available for use as wall pass-throughs. Use only parts that have been tested and listed for use as a wall pass-through.

U.S. Requirements:

The National Fire Protection Association (NFPA) has established guidelines for use in the United States for passing chimney connectors through combustible walls. Many building code inspectors follow these guidelines.

Vermont Castings Madison

Chimney Connector
	*
Heat Shield

Note clearance
* requirement on	*
pages 12-13

Mantel

ST244a

Fig. 6 If the clearance between the chimney connector and either the ceiling or the mantel is inadequate, a protective heat shield is required.

Fire clay	Min. 2” (51mm) Chimney clear-
liner	ance to brick and combustibles
A	Masonry		Min. 12”
	Chimney	Flue	(305 mm)
	constructed
	to NFPA 211	Chimney	Chimney
			connector
			Fire clay
A			liner
	A = Minimum 12” (305 mm) brick con-
	struction between liner and combustible
	framing materials		ST272

Fig. 7 Masonry Wall Pass-through with single wall chimney connector.

Figure 7 shows one NFPA-approved method. All com- bustible material in the wall is cut away to provide 12” (305mm) clearance to the connector. Brick and mortar are used to enclose the clearance area.

Alternate methods approved by the NFPA:

• Using a section of double-wall chimney with a 9”

(229mm) clearance to combustibles. (Fig. 8)

Solid insulated, listed factory- built chimney length set flush

with flue

Min. 9” 230mm

Masonry

Chimney constructed to NFPA 211

	Min. 2”
	(51mm)
	Min. 9”
	(230mm)
Flue	Chimney
	Connector
Chimney
	Air Space

• Placing a chimney connector pipe inside a steel

double-wall ventilated thimble, which is then sepa-

rated from combustibles by 6” (152mm) of fiberglass

insulating material. (Fig. 9)

		Non-soluble refrac-	24 ga.Sheet
	Sheet Steel		Steel Sup-
		tory cement	ports
ST273	Supports

Fig. 8 Wall Pass-through using factory-built insulated chimney section.

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