Install Instructions

2 Venting (continued)

Installation & Service Manual

I =

Clearance to service regulator vent

outlet

3 ft (91 cm)

J =

Clearance to nonmechanical air supply

inlet to building or the combustion air

inlet to any other appliance

6 in (15 cm) for appliances < 10,000 Btuh

(3kW), 12 in (30 cm) for appliances >

10,000 Btuh (3 kW) and < 100,000 Btuh

(30 kW), 36 in (91 cm) for appliances >

100,000 Btuh (30 kW)

4 ft (1.2 m) below or to side of opening; 1 ft

(300 mm) above opening

K =

Clearance to a mechanical air supply

inlet

6 ft (1.83 m) 3 ft (91 cm) above if within 10 ft (3 m)

horizontally

L =

Clearance above paved sidewalk or

paved driveway located on public

property

7 ft (2.13 m)† 7 ft (2.13 m) for mechanical draft systems

(Category I appliances). Vents for

Category II and IV appliances cannot be

located above public walkways or other

areas where condensate or vapor can

cause a nuisance or hazard

M =

Clearance under veranda, porch, deck,

or balcony

12 in (30 cm)‡ *

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

† 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 he  oor.

NOTES:

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

Table 2C Other than Direct Vent Terminal Clearances (continued)