Hearth and Home Technologies RUTHERFORD-50 owner manual Shrouds, A. Shroud Requirements

10 Shrouds

A. Shroud Requirements

WARNING! Risk of Fire! Shrouds must be constructed as specified. Improper construction may overheat chase top.

•Chase top shrouds may be field constructed where permitted by regional building codes.

NOTICE: Some regional codes require an agency-Listed shroud. Consult your local building officials.

•Hearth & Home Technologies Inc. supplies UL listed shrouds. See your dealer for details.

Shrouds can either be field-fabricated or factory-fabricated, but they must meet the requirements as specified in these instructions. Shrouds must be constructed of a minimum 24 ga (.024 in.) stainless steel, aluminized steel, galva- nized steel, or copper. Other materials may also be used, such as brick, mortar, stucco, stone, etc. provided they are completely non-combustible. Check with your local building code authroities for any additional shroud requirements. Shrouds must be able to be removed to allow chimney ac- cess to properly clean the chimney. DuraChimney II instal- lations which include the use of a shroud must comply with the following requirements (Figure 10.1)

•DuraChimney II must maintain at least 2 in. (51 mm) clearance from combustible materials.

•The chase enclosure must be ventilated.

•The chase top flashing or field-fabricated chase pan must be used. Field-fabricated chase pans are acceptable if they meet these requirements:

-Material must be 24 ga (.024 in) galvanized steel or equivalent.

-Chase pan must have opening 3 in. (76 mm) larger than outside diameter of chimney pipe with at least a 1/2 in. (13 mm) upturned flange/collar.

-Chase pan must overhang chase by 1/2 in. (13 mm) per side for proper air flow.

-Chase pan must have a 1 in. (25 mm) down turned outside edge (weather prtection).

Allow a 1 in. (25 mm) air gap between storm collar and chase top flashing

1/2 in. (13 mm) air space established by spacers

1/2 in. overhang

Chimney Cap

Storm Collar

Chase Top

Flashing or

Chase Pan

20 in. diameter opening

		DuraChimney II
		Pipe
14 in. (345 mm)		1/2 in.
		(13 mm)
diameter chimney
must extend at least
6 in. (152 mm) above	Maintain 2 in. (51 mm)
chase top flashing.
	clearance between	Field-fabricated
	DuraChimney II and	spacers for chase
	chase enclosure	top flashing
Figure 10.1 Shroud Requirements

32 Heat & Glo • RUTHERFORD-50 • 4059-333 Rev F • 11/08