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Installation continued-
VENTING
This is a Direct Vent Gas Water Heater where all air for combustion is
obtained from the outside atmosphere and all flue gases are discharged to
the outside atmosphere.
WARNING
The vent-air intake system must be properly installed. Failure to
properly install the vent-air intake system properly could result in
property damage, personal injury or death.
DO NOT install any damaged vent-air intake system components.
Contact the manufacturer of the water heater for replacement parts.
Note: Provide protection of the building materials from degradation by flue
gases from the direct vent-air intake terminal.
Figure 5.
Direct Vent Terminal Clearances
Canadian
Installations
1
US Installations
2
A= Clearance above grade, veranda,
porch, deck or balcony
12 inches (30
cm)
12 inches
(30 cm)
B= Clearance to widow or door that may
be opened
12 inches (30
cm)
9 inches (23 cm) for appliances
> 10,000 Btuh (3 kW) and ≤
50,000 Btuh (15 kW), 12 inches
(30 cm) for appliances > 50,000
Btuh (15 kW)
C= Clearance to permanently closed
widow
*b *b
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
12 inches (30
cm) *a
12 inches (30
cm) *a
E= Clearance to unventilated soffit 12 inches (30
cm) *a
12 inches (30
cm) *a
12