Initial Installation

QUALIFIED INSTALLERS ONLY

VENT TERMINATION RESTRICTIONS:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

N

 

 

 

 

 

 

 

 

 

O

D

E

 

 

 

 

 

H

 

 

B

 

 

 

 

 

 

 

 

C

 

 

 

 

 

 

 

L

B

Fixed

 

 

B

 

 

 

G

F

Closed

Openable

Fixed

 

 

G

 

 

Openable

Closed

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

M

 

 

B

 

A

 

J

 

 

K

 

 

 

 

 

 

 

 

 

 

 

 

I

A

 

Termination Cap

 

Air Supply Inlet

 

 

 

 

G

Gas Meter

Restriction Zone

 

 

 

 

 

 

 

 

 

(Termination not allowed)

 

Figure 24: Vent Termination Restrictions, refer to Table 7.

Table 7: Vent termination clearances, refer to Figure 24.

Letter

Canadian Installation 1

US Installation2

Description

A

12 in (30 cm)

Clearance above grade, verandah, porch, deck, or balcony.

 

 

 

 

B

12 in (30 cm)

9 in (23 cm)

Clearance from window or door that may be opened.

 

 

 

 

C

12 in (30 cm)*

Clearance from permanently closed window (to prevent

 

 

 

condensation).

 

 

 

D

22-3/4 in (57.8 cm)*

Vertical clearance to ventilated soffit located above the

 

 

 

terminal, within a horizontal distance of 2 ft (60 cm) from

 

 

 

center line of terminal.

 

 

 

E

22-3/4 in (57.8 cm)*

Clearance to unventilated soffit.

 

 

 

F

12 in (30 cm)*

Clearance to outside corner.

 

 

 

G

18 in (45.7 cm)*

Clearance to inside corner.

 

 

 

 

H

3 ft (91 cm) within a height of

3 ft (91 cm) within a height of

Clearance to each side of center line extended above

 

15 ft (4.5 m) above the meter/

15 ft (4.5 m) above the meter/

meter/regulator assembly.

 

regulator assembly

regulator assembly*

 

 

 

 

 

I

3 ft (91 cm)

3 ft (91 cm)*

Radial clearance around service regulator vent outlet.

 

 

 

 

J

12 in (30 cm)

9 in (23 cm)

Clearance to non-mechanical air supply inlet to building, or

 

 

 

the combustion air inlet to any other appliance.

 

 

 

 

K

6 ft (1.83 m)

3 ft (91 cm) above if within 10

Clearance to mechanical air supply inlet.

 

 

ft (3 m) horizontally

 

 

 

 

 

L

7 ft (2.13 m)t

7 ft (2.13 m)*t

Clearance above paved sidewalk or paved driveway located

 

 

 

on public property.

 

 

 

 

M

12 in / 30 cm+

12 in / 30 cm*+

Clearance under verandah, porch, deck, or balcony.

N

12 in (30 cm)*

Clearance horizontally to any surface (such as an exterior

 

 

 

wall) for vertical terminations.

 

 

 

O

12 in (30 cm)

Clearance above roof line for vertical terminations.

 

 

 

 

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

2 In accordance with the current ANSI Z223.1 NFPA 54, National Fuel Gas Code.

* These numbers are only estimates. Clearance in accordance with installation codes and the requirements of the gas supplier.

t A vent shall not terminate directly above a side walk or paved driveway that is located between two single family dwellings and it serves both dwellings. + Permitted only if verandah, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

NOTE: Venting terminals shall not be recessed into walls or siding.

16

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Enviro 50-1628 owner manual Vent Termination Restrictions

50-1628 specifications

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