VENT TERMINATION CLEARANCES

FOR DIRECT VENT INSTALLATIONS IN THE US AND CANADA

INSIDE CORNER

DETAIL

 

 

 

G

 

 

 

 

A

 

 

H

D

 

 

 

 

 

 

 

 

 

E

 

 

 

 

 

 

B

 

 

 

 

L

C

B

 

B

I

 

 

 

Fixed

 

 

 

 

Operable

 

 

 

Fixed

Closed

M

 

 

 

 

F

Closed

 

 

 

 

Operable

 

 

 

 

 

 

 

 

 

 

B

 

 

K

 

 

 

 

J

 

 

 

A

 

 

 

 

 

 

 

B

 

 

 

 

VENT TERMINAL

AIR SUPPLY INLET

AREA WHERE TERMINAL IS NOT PERMITTED

 

 

 

 

US Installations1

Canadian Installations2

 

 

A =

Clearance above grade, veranda,

 

12 inches (305mm) or 12 in. (305mm)

12 inches (305mm) or 12 in. (305mm)

 

 

porch, deck or balcony

 

above average snow accumulation.

above average snow accumulation.

 

 

 

 

 

 

 

 

B =

Clearance to window or

6 inches (152mm) for appliances <10,000

6 inches (152mm) for appliances <10,000

 

 

door that may be opened

Btuh (3kw), 9 inches (228mm) for ap­

Btuh (3kw), 12 inches (305mm) for

 

 

 

pliances > 10,000 Btuh (3kw) and <50,000

appliances > 10,000 Btuh (3kw) and

 

 

 

Btuh (15 kw), 12 inches (305mm) for ap­

<100,000 Btuh (30kw), 36 inches (.9m)

 

 

 

 

pliances > 50,000 Btuh (15kw)

for appliances > 100,000 Btuh (30kw)

 

 

 

 

 

 

 

 

 

C =

Clearance to permanently

 

* 12”

* 12”

 

 

closed window

 

 

 

 

 

 

 

 

 

 

 

 

 

 

D =

Vertical clearance to ventilated soffit

 

* Equal to or greater than soffit depth

 

 

 

 

 

located above the terminal within a

 

* Equal to or greater than soffit depth

 

 

horizontal distance of 2 feet (610mm)

 

 

 

 

 

 

 

from the center line of the terminal

 

 

 

 

 

 

E =

Clearance to unventilated soffit

* Equal to or greater than soffit depth

* Equal to or greater than soffit depth

 

 

F =

Clearance to outside corner

 

* No minimum to outside corner

* No minimum to outside corner

 

G =

Clearance to inside corner

 

*

*

 

 

 

 

 

 

 

 

 

H = Clearance to each side of center line ex­

3 feet (.9m) within a height 15 feet (4.5m)

3 feet (.9m) within a height 15 feet (4.5m)

 

 

tended above meter / regulator assembly

above the meter / regulator assembly

above the meter / regulator assembly

 

 

 

 

 

 

 

 

 

I =

Clearance to service regulator

 

* 3 feet (.9m)

3 feet (.9m)

 

 

vent outlet

 

 

 

 

 

 

 

 

 

 

 

 

J =

Clearance to non-mechanical air

6 inches (152mm) for appliances <10,000

6 inches (152mm) for appliances <10,000

 

 

supply inlet to building or the com­

Btuh (3kw), 9 inches (228mm) for ap­

Btuh (3kw), 12 inches (305mm) for

 

 

bustion air inlet to any other ap­

pliances > 10,000 Btuh (3kw) and <50,000

appliances > 10,000 Btuh (3kw) and

 

 

pliance

Btuh (15 kw), 12 inches (305mm) for ap­

<100,000 Btuh (30kw), 36 inches (.9m)

 

 

 

 

pliances > 50,000 Btuh (15kw)

for appliances > 100,000 Btuh (30kw)

 

 

K =

Clearance to mechanical air sup­

 

3 feet (.9m) above if within 10 feet

6 feet (1.8m)

 

 

ply inlet

 

(3m) horizontally

 

 

 

 

L =

Clearance above paved sidewalk or

 

* 7 feet (2.1m)

7 feet (2.1m)†

 

 

paved driveway located on public property

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M = Clearance under veranda, porch, deck or balcony

*12 inches (305mm)‡

12 inches (305mm)‡

 

 

 

 

 

 

 

 

 

 

 

 

1In accordance with the current ANSI Z223.1/NFPA 54 Natural Fuel Gas Code

2In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code

A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.

Permitted only if veranda, porch, deck or balcony is fully open on a minimum of

two sides beneath the floor. Lennox recommends avoiding this location if possible.

*For clearances not specified in ANSI Z223.1/NFPA 54 or CSA B149.1, clearance will be in accordance with local installation codes and the requirements of the gas supplier and these installation instructions.”

FIGURE 31

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Lennox International Inc Elite Series Gas Furnace, EL296UHE installation instructions No minimum to outside corner

EL296UHE, Elite Series Gas Furnace specifications

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One of the most significant features of the EL296UHE is its impressive Annual Fuel Utilization Efficiency (AFUE) rating of up to 96%. This means that a substantial portion of the energy consumed is converted into heat, translating to lower energy bills and a reduced environmental footprint. By minimizing energy waste, homeowners can enjoy both cost savings and greater environmental responsibility.

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