CFM Corporation 2461 Fireplace Installations Through the Fireplace, Wall Pass-Throughs, Dutchwest

Dutchwest

Fireplace Installations -

Through the Fireplace

The Convection heaters may be installed either without legs* as a fireplace insert, or with standard legs at- tached - depending on the safety regulations that apply to your situation, the height of the fireplace opening and your own preference. For either situation, the chimney connector/positive connection kit extends back from the stove, enters the fireplace cavity, and turns upward. It then passes through the fireplace damper opening and smoke chamber and connects to the chimney flue.

In such installations, a “positive connection” must be made to the chimney flue with a special kit available from your local dealer. Also, special clearance and floor protection provisions must be observed. These provi- sions are discussed in the Clearance and Floor Protec- tion sections respectively.

Wall Pass-Throughs

Whenever possible, design your installation so the con- nector does not pass through a combustible wall. If you must use a wall pass-through in your installation, check with your building inspector before you begin and con- struct it in accordance with local building codes. Also check with the chimney connector manufacturer for any specific requirements.

Accessories are available for use as wall pass- throughs. If using one of these, make sure it has been tested and listed for use as a wall pass-through.

All combustible material in the wall is cut away a suffi- cient distance from the single-wall connector to provide the required 12” (305 mm) clearance for the connector. Any material used to close up the opening must be non- combustible.

The following wall pass-through methods may be ap- proved in your area:

•Use a section of listed factory-built chimney with a nine-inch clearance to combustibles.

•Place a chimney connector pipe inside a ventilated thimble, which is then separated from combustibles by six inches (152 mm) of fiberglass insulating mate- rial.

•If the stove is installed without legs, we recommend the use of noncombustible tiles or pavers as shims to allow air flow into the convection air inlets under the stove. Make sure not to block air slots instove bottom with shims or remove fan cover.

•Place a chimney connector pipe inside a section of listed solid-insulated, factory-built chimney, with an inside diameter 2 inches (51 mm) larger than the

	12”
Chimney Con-	(305mm)
nector

12” (305mm)

ST420

Fig. 10 Wall pass-through enclosed with noncombustible materials.

18”
(450mm)
Empty Space	Sheet Metal
All Around
the Chimney	Cover
Connector	(One side
	only)

ST421

Fig. 11 Hollow wall pass-through.

chimney connector and having 1 inch (25.4 mm) or more of insulation and maintaining a minimum 2 inch air space between the outer wall of the chimney and combustibles.

DO NOT CONNECT THE HEATER TO ANY AIR DISTRIBUTION DUCT OR SYSTEM.

In Canada: The Canadian Standards Association has established different guidelines. Figure 11 shows one method, in which all combustible material in the wall is cut away to provide the required 18” (450 mm) clear- ance for the connector. The resulting space must remain empty.

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