Lennox Hearth 1003C Chimney Inspection, Vapor Barrier At Chimney Penetration, Installation

INSTALLATION

CHIMNEY INSPECTION

Existing chimneys must be inspected before installing your stove. Consult your local building department for chimney code requirements. A masonry chimney must have a code approved liner. This liner must not have bro- ken or missing pieces. Some non-code masonry chim- neys may be brought up to code by being relined. (Con- sult your dealer or qualified chimney sweep). Factory built chimneys should also be inspected, first for creo- sote deposits (which should be removed), and then for integrity of the stainless steel liner. Look for obvious bulges in the lining, which may indicate the need to re- place that section (use a bright flashlight).

Also, inspect the attic to see that the chimney has proper clearance to combustible framing members. For interior masonry chimneys and most factory-built chimneys, this must be a 2“ (51 mm) air space clearance, which must not be filled with insulation or any other material. An ex- terior masonry chimney must have a 1“ (25.4 mm) air space clearance.

Vapor Barrier At Chimney Penetration

Install all venting components per the Vent Manufactur- ers installation instructions. Ensure that there is an effec- tive vapor barrier at the location where the chimney penetrates to the exterior of the structure. This can be accomplished by applying a non-hardening waterproof sealant to the following components:

•Around the chimney at the point where the storm collar will meet the chimney just above the Flashing.

•Along the vertical seam of the chimney pipe, where it is exposed to the weather.

•On each nail head on the flashing.

•Around the chimney at the point where the storm collar will meet the chimney just above the flashing.

Notes:

•On a flat or tarred and graveled roof, nail and seal the flat roof flashing to the roof on all sides with roof- ing compound.

•Do not put screws through the flashing into the chim- ney pipe.

CHIMNEY HEIGHT REQUIREMENTS

The chimney must extend 3 feet (914 mm) above the level of roof penetration and a minimum of 2 feet (610 mm) higher than any roof surface within 10 feet (305 cm) (see below). Check with your local building officials for any addi- tional requirements for your area.

Due to prevailing winds, local terrain, adjacent tall trees, a hill, or ravine near the home, or adjacent structures, addi- tional chimney height or a special chimney cap may be re- quired to ensure optimum performance.

The 2’ by 10’ Rule for Vent Termination

The top of the flue must be 2’ (610 mm) higher than any part of the roof within 10’ (305 cm) horizontal and a mini- mum of 3’ (915 mm) higher than the highest point of roof penetration.

Requires A Listed	3’ (915mm)
Termination Cap

2’ (610mm)

10’ (305 cm)

For Manufactured (Mobile) Homes Only: Portions of the chimney and termination that exceed an elevation of 13½ feet above ground level may be designed to be re- moved for transporting the manufactured (mobile) home.

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