Vermont Casting 1635, 1638, 1637, 1636 Wall Pass-through with ventilated steel thimble

Vermont Castings Seville

•Placing a chimney connector pipe inside a section of 9" (229mm) diameter, solid-insulated, factory-built chimney, with two inches of air space between the chimney section and combustibles. (Fig. 10)

Canadian Requirements:In Canada, the Canadian Standards Association has established specific guidelines regarding wall pass-though design. Figure 11 shows one approved method in which all combustible material in the wall is cut away to provide the required 18" (457mm) clearance around the connector. The resulting space must remain empty. A flush-mounted sheet metal cover may be used on one side only. If covers must be used on both sides, each cover must be mounted on noncombustible spacers at least 1" (25mm) clear of the wall. Your local dealer or your local building inspector can provide details of other approved methods of passing a chimney

Chimney clearance to sheet
steel supports and combustibles		2" (51mm) Min.
Steel Thimble
with two 1"
(25mm) Ventilated		Min. 6"
Channels		(152mm)
	Flue	Chimney Connector
	Chimney	Glass Fiber
Masonry Chimney		Insulation
constructed to NFPA 211
		24 ga.Sheet
		Steel Supports

ST274

Fig. 9 Wall Pass-through using single wall chimney connector with a ventilated steel thimble.

connector through a combustible wall.

In Canada, this type of installation must conform to CAN/CSA-B365, Installation Code for Solid Fuel Burning Appliances and Equipment.

Chimney clearance to sheet steel supports and combustibles

2" (51mm) Min.
air space
	Flue
Prefab	Chimney
Chimney
Section
24 ga. Sheet
Steel Supports

ST275

2" (51mm)

Min.

2" (51mm) Min.

Chimney

Connector

Prefab

Chimney

Section

24 ga. Sheet Steel Supports

Masonry Chimney constructed to NFPA 211

Fig. 10 Wall Pass-through with ventilated steel thimble.

Min. 18"
(460mm)	Chimney clearance to sheet steel		2" (51mm)
	supports and combustibles		Min.
	Flue		Min. 18"
			(460mm)
	Chimney
			Chimney
			Connector
			24 ga.Sheet
			Steel Support
	24 ga. Sheet	Masonry Chimney
	Steel Support
	(one side only)	constructed to CAN/CSA-

ST276

B365

Fig. 11 CSA approved Wall Pass-through.

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