Installation instructions
Greentherm T9900 SE/i – 6 720 813 635 (2019/03)
24
Required direct vent terminal clearances (twin pipe / concentric penetration)
Fig. 10
Canadian installations
1)
with direct vent terminals
U.S. installations
2)
with direct vent
A
Clearance above grade, veranda, porch, deck or balcony
12 in. (30cm)
12 in. (30cm)
B
Clearance to window or door that may be opened
36 in. (91cm)
12 in. (30cm) below or
to side of opening; 12
in. (30cm) above
C
Clearance to permanently closed window
*
*
D
Vertical clearance to ventilated soffit located above the terminal within
a horizontal distance of 2 ft (61cm) from the center line of the terminal.
*
*
E
Clearance to unventilated soffit
*
*
F
Clearance to outside corner
*
*
G
Clearance to inside corner
*
*
H
Clearance to each side of center line extended above meter/regulator
assembly
36 in. (91cm) within a
height 15 ft (4.6m) above
the meter/ regulator
assembly
*
I
Clearance to service regulator vent outlet
36 in. (91cm)
*
J
Clearance to nonmechanical air supply inlet to building or the
combustion air inlet to any other appliance.
36 in. (91cm)
12 in. (30cm)
K
Clearance to a mechanical air supply inlet
6 feet (1.83m)
36 in. (91cm) above if
within 10 ft (3m)
horizontally
L
Clearance above paved sidewalk or paved driveway located on public
property
7 ft (2.13m)
3)
*
M
Clearance under veranda, porch deck or balcony
12 in. (30cm)
4)
*
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.
