4. MINIMUM CLEARANCES FROM VENT/AIR INLET TERMINATION

Fig. 20

 

V = vent terminal X = air supply inlet

\\\ = area where terminal is not permitted

 

 

 

 

 

 

 

 

 

 

 

 

Tab. 6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

U.S. Installations1

Canadian Installations2

 

 

 

 

 

 

 

 

 

A

Clearance above grade, veranda,

 

 

 

 

 

 

 

porch, deck, or balcony

 

1 ft (30 cm)

1 ft (30 cm)

 

B

Clearance to window or door that may

4 ft (1.2m) below or to side of

 

 

 

 

 

be opened

 

opening; 1 foot (30 cm) above

3 ft (91 cm)

 

 

 

 

opening

 

 

 

 

C

Clearance to permanently closed window

*

*

 

 

 

 

 

 

 

 

 

 

D

Vertical clearance to ventilated soffit located above

5 ft (1.5m)

*

 

 

 

 

the terminal within a horizontal distance of 2 ft (61cm)

 

 

 

 

 

 

from the centerline of the terminal

 

 

 

 

 

 

 

 

 

 

 

 

 

 

E

Clearance to unventilated soffit

 

*

*

 

 

 

 

 

 

 

 

 

 

 

F

Clearance to outside corner

 

*

*

 

 

 

 

 

 

 

 

 

 

 

G

Clearance to inside corner

 

6 ft (1.83m)

*

 

 

 

 

 

 

 

 

 

 

H

Clearance to each side of center line

*

3 ft (91 cm) within a height

 

 

extended above meter/regulator assembly

 

15 ft above the meter/ regulator

 

 

 

 

 

assembly

 

 

 

 

 

 

 

 

I

Clearance to service regulator vent outlet

*

6 ft (1.83m)

 

 

 

 

 

 

 

 

J

Clearance to non-mechanical air supply inlet to

4 ft (1.2m) below or to

3 ft (91 cm)

 

 

building or the combustion air inlet to any other

side of opening; 1 ft

 

 

 

 

 

appliance

 

(30 cm) above opening

 

 

 

 

 

 

 

 

 

 

 

K

Clearance to mechanical air supply inlet

3 ft (91 cm) above if within

6 ft (1.83m)

 

 

 

 

10 ft (3m) horizontally

 

 

 

 

 

 

 

 

 

 

L

Clearance above paved sidewalk or paved driveway

7 ft (2.13m)

7 ft (2.13m) t

 

 

located on public property

 

 

 

 

 

 

 

 

 

 

 

 

M

Clearance under veranda, porch, deck or balcony

*

12 in. (30 cm) TT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Code 2 In accordance with the current CAN/CGA-B149 Installation Codes

t Vent terminal shall not terminate directly above sidewalk or paved driveway located between 2 single family dwellings that serves both dwellings

TTPermitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor and top of terminal and underside of veranda, porch, deck or balcony is greater than 1 ft (30cm)

* Clearances in accordance with local installation codes and the requirements of the gas supplier

26

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Raypak 85, 120 manual Minimum Clearances from VENT/AIR Inlet Termination, Installations1 Canadian Installations2

120, 85 specifications

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