Navien NPE-180A Installation Manual page 29

Ref Description
A Clearance above grade, veranda, porch, deck, or balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the
D terminal within a horizontal distance of 2 feet (61 cm)
from the center line of the terminal
E Clearance to unventilated soffit
F Clearance to outside corner
G Clearance to inside corner
Clearance to each side of center line extended above
H
meter/regulator assembly
I Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to building
J
or the combustion air inlet to any other appliance
K Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway
L
located on public property
M Clearance under veranda, porch deck, or balcony
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.
28 Installing the Water Heater
Canadian Direct Vent Installations
12 in (30 cm)
36 in (91 cm)
*
*
*
*
*
3 ft (91 cm) within a height 15
ft above the meter/regulator
assembly
3 ft (91 cm)
36 in (91 cm)
6 ft (1.83 m)
7 ft (2.13 m) †
12 in (30 cm) ‡
1
US Direct Vent Installations
12 in (30 cm)
12 in (30 cm)
*
*
*
*
*
*
*
12 in (30 cm)
3 ft (91 cm) above if within 10
ft (3 m) horizontally
*
*
2