1-13
INSTALLATION
HC SERIES BOILERS
HC 13-50, HC 15-95, HC 15-96, HC 20-125, HC 33-160
E= Clearance to
unventilated soffit
*
*
F= Clearance to outside
corner
*4 ft (1.22m) or local code,
whichever is stricter
* 4 ft (1.22m) or local code,
whichever is stricter
G= Clearance to inside
corner
* 4 ft (1.22m) or local code,
whichever is stricter
* 4 ft (1.22m) or local code,
whichever is stricter
H= Clearance to each side
of center line extended
above meter/regulator
assembly
3 ft (91 cm) within a height
15 ft above the meter/
regulator assembly
*
I= Clearance to service
regulator vent outlet
3 ft (91 cm)
*
J= Clearance to
nonmechanical air supply
inlet to building or the
combustion air inlet to any
other appliance
6 in (15 cm) for appliances
≤ 10,000 Btuh (3 kW), 12
in (30 cm) for appliances >
10,000 Btuh (3 kW) and ≤
100,000 Btuh (30 kW), 36
in (91 cm) for appliances
≤100,000 Btuh (30 kW)
6 in (15 cm) for appliances
≤ 10,000 Btuh (3 kW), 9 in
(23 cm) for appliances >
10,000 Btuh (3 kW) and ≤
50,000 Btuh (15 kW), 12
in (30 cm) for appliances >
50,000 Btuh (15 kW)
K= Clearance to a
mechanical air supply inlet
6 feet (1.83 m)
3 ft (91 cm) above if within
10 ft (3 m) horizontally
L= Clearance above paved
sidewalk or paved driveway
located on public property
7 ft (2.13 m) †
*
M= Clearance under
veranda, porch deck, or
balcony
12 in (30 cm) ‡
*
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.
V
V
V
V
V
V
V
V
V
X
X
F
C
B
D
E
B
K
M
G
A
INSIDE
CORNER DETAIL
H
FIXED
CLOSED
OPERABLE
OPERABLE CLOSED
FIXED
B
J
A
B
B
B
V VENT TERMINAL
X AIR SUPPLY INLET
AREA WHERE TERMINAL IS NOT PERMITTED
I
L
Figure 14A: Vent Terminal Clearance
