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E. Vent and Combustion Air Terminations
1. Vent Piping
a. Install fire stops where vent passes through
floors, ceilings or framed walls. The fire stop
must close the opening between the vent pipe
and the structure.
b. Whenever possible, install vent straight
through the roof.
c. Size roof opening to maintain minimum
clearance of 1 in. (25 mm) from combustible
materials.
d. Extend vent pipe to maintain minimum vertical
distance for expected snow accumulation.
Provide brace as required.
e. Install storm collar on vent pipe immediately
above flashing. Apply Dow Corning Silastic 732
RTV Sealant or equivalent between vent pipe
and storm collar to provide weather-tight seal.
2. Combustion Air Piping
a. If possible, locate combustion air termination
in the same roof location as the vent
termination to prevent nuisance shutdowns.
Alternatively, this appliance may be installed
with a vertical roof vent terminal and sidewall
combustion air terminal.
b. Size roof opening to allow easy insertion
of combustion air piping and allow proper
installation of flashing and storm collar to
prevent moisture from entering the structure.
c. Use appropriately designed vent flashing
when passing through roofs. Follow flashing
manufacturers' instructions for installation.
d. Extend combustion air pipe to maintain
minimum vertical and horizontal distance of
12 in (300 mm) from roof surface or from the
maximum snow level.
Thermal Solutions, 1175 Manheim Pike, Lancaster, PA 17601 Website: www.thermalsolutions.com
Phone: 717-239-7642 Fax: 877-501-5212 Email: sales@thermalsolutions.com
CAUTION
CAUTION
Reliable operation of this appliance is not
guaranteed when the terminals are subject to
winds above 40 mph.
The required spacing between vent and
combustion air terminals is to prevent flue gas
recirculation. Recirculation of flue gas products
into the combustion air supply can cause damage
to property or the appliance.
WARNING
WARNING
Failure to vent this appliance in accordance
with these instructions could cause products of
combustion to enter the building resulting in severe
property damage, personal injury or death.
Do not locate vent termination under a deck, or
where exposed to prevailing winds.
Do not locate combustion air termination where
volatile vapors or other chemicals are present.
Severe corrosion and failure will result.
Do not interchange vent systems or materials unless
otherwise specified.
Do not apply thermal insulation to vent pipe or
fittings.
Do not use a barometric damper or draft hood with
this appliance.
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