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F F u u r r n n a a c c e e G G e e n n e e r r a a l l I I n n s s t t a a l l l l a a t t i i o o n n
Vent Terminations
For DIRECT VENT APPLICATION: The Furnaces must be
vented to the exterior of the house and combustion air MUST
come through the inlet air pipe from OUTSIDE AIR.
Note: BAYVENT* accessories can be used for inlet and outlet
terminals when the pipes do not exit the structure
together. For Canadian applications, venting systems
must meet ULC-S636 requirements.
For NONDIRECT VENT APPLICATION: The Furnace shall be
vented to the exterior of the house, but combustion air may
enter from the surrounding area as long as combustion air
requirements are met. (See AIR FOR COMBUSTION AND
VENTILATION)
FURNACE VENT / INLET PIPE INSTALLATION IN TWO PRESSURE ZONE CONFIGURATIONS
There are many different variations of the vent / inlet air pipe combination. The vent / inlet air combination used for installation of these
Furnaces depends on the needs of the location. However, these guidelines must be followed:
1.
The Furnace must vent outside the structure.
2.
Furnace combustion air requirements must be met for non-direct, single pipe applications.
3.
For direct vent application of these Furnaces, the vent pipe and air inlet pipe do not have to exit in the same air space or even on the same
surface of the structure. However, the longest individual pipe will decide the value for the longest allowable equivalent vent/ inlet air length
as shown in the vent length table.
Note: For single pressure zone applications, see the Horizontal Venting section.
The following are EXAMPLES ONLY.
EX. 1 –
Example 1 shows the vent pipe exhausting through the roof and
the inlet air coming from the interior of the house. The inlet air
coming from the interior of the house must meet combustion
requirements for area, etc., as shown in the section AIR FOR
COMBUSTION AND VENTILATION.
Note: If only the flue gas pipe is to the outside of the structure,
a straight section of pipe (long enough to exit the Furnace
cabinet) must be attached to the inlet air side with an
elbow (which is 5 to 10 equiv. ft.) installed on the end to
prevent dust and debris from falling directly into the
Furnace.
EX. 2 –
The inlet air does not have to come from outside the structure.
Example 2 shows the inlet air, may come from the attic if the
requirements for combustion air are met as shown in the section
AIR FOR COMBUSTION AND VENTILATION.
Note: If only the flue gas pipe is to the outside of the structure,
a straight section of pipe (long enough to exit the Furnace
cabinet) must be attached to the inlet air side with an
elbow (which is 5 to 10 equiv. ft.) installed on the end to
prevent dust and debris from falling directly into the
Furnace.
EX. 3 –
Example 3 shows that the exhaust vent may go vertical while
the inlet air may be on any side of the structure. The vent pipe
would decide the maximum equivalent length for the pip
depending on the furnace and pipe size.
34
Vent terminations
•
BAYVENT200B
•
BAYAIR30AVENTA
Vent terminations – Canadian applications. Meets ULC-S636 requirements.
•
BAYVENTCN200B
•
BAYAIR30CNVENT
Air
Inlet
Attic
Vent
Inlet
Air
Inlet
Vent
Furnace
Vent
Air
Furnace
Vent
Furnace
S9V2-VS-SVX001-1C-EN
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