Rheem PowerVent Series Use & Care Manual page 17

Vent Terminal Clearances
V = Vent Terminal
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
D -
Vertical clearance to ventilated soffit located
above the terminal within a horizontal
distance of 2 feet (61 cm) from the center
line of the terminal
E -
F -
Clearance to outside corner
G -
Clearance to inside corner
H -
Clearance to each side of centerline extend-
ed above meter/regulator assembly
I -
Clearance to service regulator vent outlet
J -
Clearance to non mechanical air supply inlet
to building or the combustion air inlet to any
other appliance
K -
Clearance to a mechanical air supply inlet
L -
Clearance above paved sidewalk or paved
driveway 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.
†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.
* For clearances not specified in ANSI Z223.1/NFPA or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.20, or
b) A reference to the following footnote:
"Clearance in accordance with local installation codes and the requirements of the gas supplier."
X = Air Supply Inlet
Canada Installations²
12 in. (30 cm)
6 in. (15 cm) for appliances ≤ 10,000 Btuh (3 kW), 12 in (30 cm) for
10,000 Btuh (3 kW) and ≤ 100,000 Btuh (30 kW),
36 in (91 cm) for appliances > 100,000 Btuh (30 kW)
3 ft (91 cm) within a height of 15 ft above the meter/regulator assembly
3ft. (91cm)
6 in. (15 cm) for appliances ≤ 10,000 Btuh (3 kW), 12 in (30 cm) for appliances >
10,000 Buth (3 kW) and ≤ 100,000 Btuh (30 kW), 36 in (91 cm) for
appliances > 100,000 Btuh (30 kW)
6 ft. (1.83 m)
7 ft 92.13 M)†
12 in (30 CM)‡
Αrea Where Terminal Is Not Permitted
*
*
*
*
*
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