Lennox Hearth T300P operation manual Installation, Vent Termination, Chimney Height Requirements

INSTALLATION

VENT TERMINATION

Do not terminate vent in an enclosed or semi-enclosed area such as: carports, garage, attic, crawl space, under a deck, porch, narrow walkway, closely fenced area, or any location that can build up a concentration of fumes such as a stairwell, covered breezeway, etc.

Vent surfaces can get hot enough to cause burns if touched. Adults should supervise children when they are in the area of a hot stove. Non-combustible shielding or guards may be required.

Termination Cap: The termination of the outside chim- ney of the pellet stove shall be located in accordance with the following:

A.Higher than 3’ (.92M) above any forced air inlet (air conditioner, etc.) located within 10’ (3M).

B.Not less than 4’ (1.2M) below, 4’ (1.2M) horizontally from or 1’ (3.1M) above any gravity air inlet (door, window, etc.) which flue gases could re-enter the dwelling.

C.Not less than 2’ (.6M) from combustible materials such as an adjacent buildings, fences, protruding parts of the structure, roof overhang, plants and shrubs, etc. and not less than 7’ (2.1M) above grade when located adjacent to the public sidewalks (ac- cess). The final termination of the exhaust system must be configured so that flue gases do not jeopard- ize the safety of people passing by, overheat com- bustible portions of nearby structures or enter the dwelling.

D.Not less than 3’ (.92M) below an eave (maximum overhang of 3’ (.92M) or any construction that pro- jects more than 2” (51mm) from the plane of the wall.

E.The distance from the bottom of termination to grade is 12” (305mm) minimum. This is conditional upon plants and nature of grade surface: Be careful to choose a location for the vent termination which does not expose people or shrubs to high heat from the exhaust gases. The exhaust gases are not hot enough to ignite grass, plants and shrubs located in the vicinity of the termination although they should be a minimum of 3’ (.92M) away. The grade surface un- der the termination must not be a lawn.

F.Since sparks may escape from the exhaust pipe of any stove, use caution when positioning the vent pipe. Refer to pipe manufacturer’s instructions when installing and terminating the exhaust. The vent pipe should be horizontal and never run the pipe in a downward direction (recommend a ¼” (7mm) rise per foot horizontal).

Note: It is not recommended to terminate exhaust vent on the prevailing wind side of the house.

Chimney Height Requirements

The vent termination height required is 12” minimum above the roof penetration point as illustrated below (Ref. National Standard, NFPA 7-4.1). Check with your local building official for additional requirements for your area.

REQUIRES A

LISTED

TERMINATION

CAP✸

12” MIN

TERMINATION MUST BE

AT LEAST 12” (305mm)

ABOVE THE HIGHEST

POINT WHERE IT PASS-

ES THROUGH THE ROOF

SURFACE.

Manufactured (Mobile) Home

Chimney Height Requirements

The chimney must extend 3’ (.92M) above the level of roof penetration and a minimum of 2’ (.61M) higher than any roof surface within 10’ (3M) (see below). Check with your local building officials for additional requirements for your area.

	TOP OF FLUE MUST BE 3’
REQUIRES A LISTED
TERMINATION CAP✸	HIGHER THAN HIGHEST POINT
	OF ROOF PENETRATION

TOP OF FLUE MUST BE 2’

HIGHER THAN ANY PART OF

ROOF WITHIN 10’ HORIZONTAL

To pass inspection in nearly any jurisdiction, the chimney must meet both safety and exhaust flow requirements. The (3’ by) 2’ by 10’ rule applies to both masonry and factory built chimneys.

✸Ref. NFPA 7 – 4.1.2, Vents installed with a listed cap shall terminate in accordance with the terms of the cap’s listings.

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