H2O HC Series, Installation, Operation And Maintenance Manual

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H2O BOILER
HC SERIES IOM Manual
Table 5: Vent Termination Guide Line
Canadian installation (note 1) US installation (note 2)
A = Clearance above grade,
veranda, porch, deck, or
balcony 12 in (30 cm) 12 in (30 cm) (Note 7)
B = Clearance to window or door
that may opened 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) 4 ft (1.2 m) below or to
side of opening; 1 ft
(300 mm) above
opening
C = Clearance to permanently
close window See note 4 See note 4
D = Vertical clearance to
ventilated soffit located
above the terminal within a
horizontal distance of 2 ft
(61 cm) from the center line
of the terminal See note 4 See note 4
E = Clearance to unventilated
soffit See note 4 See note 4
F = clearance to outside corner See note 4 See note 4
G = Clearance to inside corner See note 4 See note 4
H = Clearance to each side of
center line extended above
meter/ regulator assembly See note 4 See note 4
I = Clearance to service
regulator vent outlet Above a regulator within 3 ft (91 cm)
horizontally of the vertical center line
of the regulator vent outlet to a
maximum vertical distance of 15 ft
(4.5 m) See note 4
J = Clearance to non-mechanical
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) 4 ft (1.2 m) below or to
side of opening; 1 ft
(300 mm) above
opening
K = Clearance to a mechanical
air supply inlet 6 ft (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) See note 5 7 ft (2.13 m)
M = Clearance under veranda,
porch, deck, or balcony 12 in (30 cm) See note 6 See note 4
Notes:
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.
3. For clearances not specified in ANSI Z223.1/ NFPA 54 or CSA-B149.1. Clearance in accordance with local installation
codes and the requirements of the gas supplier
4. “Clearance in accordance with local installation codes and the requirements of the gas supplier.”
5. A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family
dwellings and serves both dwellings.
6. Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor.
7. Value is the minimum from the average snow line, refer to local codes for more specific requirements.
D-VAC Sales Inc. Email: dmann@dvachvac.com Tel: (516) 256-3131 www.dvachvac.com