TERMINATION CLEARANCES SIDEWALL POWER VENT

 

 

 

 

 

 

POWER VENT

 

 

 

 

 

 

 

 

(using room air for combustion)

 

 

 

 

EXTERIOR CLEARANCES FOR SIDEWALL VENT TERMINATION

 

 

 

 

 

 

 

 

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FIXED

 

 

 

 

 

 

 

 

 

 

 

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FIXED

 

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CLOSED

 

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CLOSED

 

 

 

 

 

 

 

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V

VENT TERMINAL

X AIR SUPPLY INLET

 

AREA WHERE TERMINAL IS NOT PERMITTED

Figure 31.  POWER VENT

Vent terminal clearances for “Power Vent” installations. Power Vent configurations use room air for combustion.

 

 

CANADIAN INSTALLATIONS 1

US INSTALLATIONS 2

 

 

CANADIAN INSTALLATIONS 1

US INSTALLATIONS 2

 

Clearance above grade,

 

 

 

Clearance to each side

3 feet (91 cm) within a height 15 feet

3 feet (91 cm) within a

A

 

 

H

of center line extended

height 15 feet (4.5 m)

veranda, porch, deck or

12 inches (30 cm)

12 inches (30 cm)

above meter/regulator

(4.5 m) above the meter/

above the meter/regulator

 

balcony

 

 

 

assembly

regulator assembly

assembly*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6 inches (15 cm) for appliances up to

 

 

 

 

 

 

Clearance to window

10,000 Btu/hr (3 kW), 12 inches (30

4 feet (1.2 m) below

 

Clearance to service

 

 

B

cm) for appliances between 10,000

or to side of opening;

I

 

 

or door that may be

regulator vent outlet

3 feet (91 cm)

3 feet (91 cm)*

Btu/hr (3 kW) and 100,000 Btu/hr (30

1 foot (30 cm) above

 

opened

kW), 36 inches (91 cm) for appliances

opening

 

 

 

 

 

 

 

 

 

 

 

 

above 100,000 Btu/hr (30 kW)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6 inches (15 cm) for appliances up

 

 

 

 

 

 

Clearance to a non

to 10,000 Btu/hr (3 kW), 12 inches

4 feet (1.2 m) below or to

 

Clearance to

 

 

 

mechanical air supply

(30 cm) for appliances between

C

 

 

J

side of opening; 1 foot

permanently closed

12 inches (30 cm)*

12 inches (30 cm)*

inlet into building or

10,000 Btu/hr (3 kW) and 100,000

(30 cm) above opening.

 

window

 

 

 

combustion air inlet to

Btu/hr (30kW), 36 inches (91cm)

 

 

 

 

 

 

any other appliance

for appliances above 100,000 Btu/

 

 

 

 

 

 

 

hr (30 kW)

 

 

 

 

 

 

 

 

 

 

Vertical clearance to

 

 

 

 

 

 

 

ventilated soffit located

 

 

 

 

 

3 feet (91 cm) above if

 

above the terminal

 

 

 

Clearance to a

 

D

 

 

K

 

within

within a horizontal

12 inches (30 cm)*

12 inches (30 cm)*

mechanical air supply

6 feet (1.83 m)

10 feet (3 m) horizontally

 

distance of 2 feet (61

 

 

 

inlet

 

 

 

cm) from the center line

 

 

 

 

 

 

 

of the terminal

 

 

 

 

 

 

 

 

 

 

 

Clearance above paved

 

 

E

Clearance to

12 inches (30 cm)*

12 inches (30 cm)*

L

sidewalk or paved

7 feet (2.13 m)†

7 feet (2.13 m)

unventilated soffit

driveway located on

 

 

 

 

 

 

public property

 

 

 

 

 

 

 

 

 

 

F

cornerClearance to outside

 

 

M

Clearance under

 

 

2 feet (60 cm)*

2 feet (60 cm)*

veranda, porch, deck, or

12 inches (30 cm) ‡

12 inches (30 cm) ‡

 

 

 

 

 

balcony

 

 

G

cornerClearance to inside

8 feet (2.44 m)*

8 feet (2.44 m)*

 

 

 

 

1 In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code. 2 In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas 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.

* Clearance in accordance with local installation codes and the requirements of the gas supplier and the manufacturer’s installation instructions.

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