Bradford White TTW ULG2PV50H565N19 Installation And Operation Instruction Manual page 9

Venting continued-
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= 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
I= Clearance to service regulator vent
outlet or oil tank vent
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 a veranda, porch,
deck, or balcony
1
In accordance w it h t he current CAN/CGA-B149 Inst allat ion Codes.
2
In accordance w it h t he current ANSI Z223.1-(Lat est edit ion)/NFPA 54 Nat ional Fuel Gas Code.
† A vent shall not t erminat e direct ly above a sidew alk or paved drivew ay t hat is locat ed bet w een t w o
single-f amily dw ellings and serves bot h dw ellings.
‡ Permit t ed only if a veranda, porch, deck or balcony is f ully open on a minimum of t w o sides beneat h
t he f loor.
* a) A minimum clearance value det ermined by t est ing in accordance w it h sect ion 2.20.
* b) '' Clearance in accordance w it h local inst allat ion codes and t he requirement s of t he gas supplier'' .
The vent system must terminate so that proper clearances are maintained as cited
in local codes or the latest edition of the National Fuel Gas Code, ANSI
Z223.1.73.4e and 7.8a, b as follows:
1. Do not terminate near soffit vents or crawl space or other area where condensate
or vapor could create a nuisance or hazard or cause property damage.
2. Do not terminate the exhaust vent terminal where condensate or vapor could cause
damage or could be detrimental to the operation of regulators, relief valves, or
other equipment.
3. Do not terminate the exhaust vent terminal over public area or walkways where
condensate or vapor can cause nuisance or hazard.
4. The vent shall terminate a minimum of 12" (25.4 cm) above expected snowfall level
to prevent blockage of vent termination.
Canadian
1
Installations
12 inches
(30 cm)
12 inches 4 feet (1.2 m) below or
(30 cm) to the side of opening;
12 inches (30 cm) above
*b
*b
*b
*b
*b
3 feet (91 cm)
within a height
15 feet (4.6 m)
above the
meter/regulator
assembly
36 inches
(91 cm)
12 inches 4 feet (1.2m) below or to
(30 cm) side of opening; 12
inches (30 cm) above
6 feet 3 feet (91 cm) above if
(1.83 m)
7 feet
(2.13 m)†
12 inches
30 cm) ‡
9
2
US Installations
12 inches
(30 cm)
opening
*b
*b
*b
*b
*b
*b
*b
opening.
within 10 feet
horizontally
7 feet
(2.13 m)†
*b