10
DVHVAC36
10001195
V
V
V
V
V
V
V
X
X
X
D
E
B
B
B
C
B
M
B
A
J
K
F
L
VENT TERMINATION
AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
H
I
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Operable
Operable
Fixed
Closed
V
B
CFM145a
DV Termin Location
5/01/01 Rev. 12/05/01
sta
INSIDE
CORNER DETAIL
V
A
G
N
N
CFM145a
General Venting Information - Termination Location
A = Clearance above grade, veranda, porch,
12” (30cm)
12” (30cm)
deck, or balcony
B = Clearance to window or door that may be
6” (15cm) for appliances
6” (15cm) for appliances
opened
< 10,000Btuh (3kW), 12” (30cm)
< 10,000 Btuh (3kW), 9”
for appliances > 10,000 Btuh (3kW) and
(23cm) for appliances > 10,000
< 100,000 Btuh (30kW), 36” (91cm)
Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW)
(15kW), 12” (30cm) for
appliances > 50,000 Btuh (15kW)
C = Clearance to permanently closed window
12” (305mm) recommended to
12” (305mm) recommended to
prevent window condensation
prevent window condensation
D = Vertical clearance to ventilated soffit located
above the terminal within a horizontal
18” (458mm)
18” (458mm)
distance of 2 feet (610mm) from the center
line of the terminal
E = Clearance to unventilated soffit
12” (305mm)
12” (305mm)
F = Clearance to outside corner
see next page
see next page
G = Clearance to inside corner (see next page)
see next page
see next page
H = Clearance to each inside of center line
3’ (91cm) within a height of 15’
3’ (91cm) within a height of 15’
extended above meter/regulator assembly
above the meter/regulator assembly
above the meter/regulator assy
I = Clearance to service regulator vent outlet
3’ (91cm)
3’ (91cm)
J = Clearance to nonmechanical air supply inlet 6” (15cm) for appliances < 10,000
6” (15cm) for appliances
to building or the combustion air inlet to any Btuh (3kW), 12” (30cm) for
< 10,000 Btuh (3kW), 9”
other appliances
appliances > 10,000 Btuh (3kW) and <
(23cm) for appliances > 10,000
100,000 Btuh (30kW), 36” (91cm)
Btuh (3kW) and < 50,000 Btuh
for appliances > 100,000 Btuh (30kW)
(15kW), 12” (30cm) for
appliances > 50,000 Btuh (15kW)
K = Clearance to a mechanical air supply inlet
6’ (1.83m)
3’ (91cm) above if within 10’
(3m) horizontally
L = Clearance above paved sidewalk or paved 7’ (2.13m)†
7’ (2.13m)†
driveway located on public property
M = Clearance under veranda, porch, deck or
12” (30cm)‡
12” (30cm)‡
balcony
N = Clearance above a roof shall extend a minimum of 24” (610mm) above the highest point when it passes through the roof
surface, and any other obstruction within a horizontal distance of 18” (450mm).
1 In accordance with the current CSA-B149 Installation Codes
2 In accordance with the current ANSI Z223.1/NFPA 54 National Fuel Gas Codes
† A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves
both dwellings
‡ only permitted if veranda, porch, deck or balcony is fully open on a minimum 2 sides beneath the floor:
NOTE: 1. Local codes or regulations may require different clearances.
2. The special venting system used on Direct Vent fireplaces are certified as part of the appliance, with clearances tested and app-
roved by the listing agency.
3. CFM Corporation assumes no responsibility for the improper performance of the appliance when the venting system does not
meet these requirements.
Canadian Installations
1
US Installations
2
Fig. 9
Termination clearances.
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