Laars heating systems company – LAARS EDN Series - Installation, Operation and Maintenance Instructions User Manual

Page 8

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Page 8

LAARS Heating Systems Company

Figure 8. Vent Terminal Clearance.

U.S. Installations (see note 1)

Canadian Installations (see note 2)

A= Clearance above grade, veranda, porch,

12 inches (30 cm)

12 inches (30 cm)

deck, or balcony

B= Clearance to window or door that may

Direct Vent Only: 12 inches (30 cm)

be opened

Other Than Direct Vent: 4 feet (1.2 m) below or 36 inches (91 cm)

to side of opening; 1 foot (30 cm) above opening

C= Clearance to permanently closed window

See note 4

See note 5

D= Vertical clearance to ventilated soffit located

above the terminal within a horizontal

See note 4

See note 5

distance of 2 feet (61cm) from the center line of the terminal

E= Clearance to unventilated soffit

See note 4

See note 5

F= Clearance to outside corner

See note 4

See note 5

G= Clearance to inside corner

See note 4

See note 5

H= Clearance to each side of center line

See note 4

3 feet (91 cm) within a height 15 feet

extended above meter/regulator assembly

above the meter/regulator assembly

I= Clearance to service regulator vent outlet

See note 4

3 feet (91 cm)

J= Clearance to nonmechanical air supply

Direct Vent Only: 12 inches (30 cm)

inlet to building or the combustion air inlet Other Than Direct Vent: 4 feet (1.2 m) below or 36 inches (91 cm)

to any other appliance

to side of opening; 1 foot (30 cm) above opening

K= Clearance to a mechanical air supply inlet 3 feet (91 cm) above if within 10 feet (3 m)

6 feet (1.83 m)

horizontally

L= Clearance above paved sidewalk or paved Vent termination not allowed in this location

Vent termination not allowed in this

driveway located on public property

location

M= Clearance under veranda, porch, deck,

See note 4

12 inches (30 cm) (see note 3)

or balcony

Notes:

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.

3. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.

4. For clearances not specified in ANSI Z223.1 / NFPA 54, clearance is in accordance with local installation codes and the requirements of

the gas supplier.

5. For clearances not specified in CAN/CGA-B149, clearance is in accordance with local installation codes and the requirements of the gas

supplier.

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