Termination Requirements - Rheem R95P Installation Instructions Manual

GENERAL VENTING REQUIREMENTS AND

TERMINATION REQUIREMENTS

THE COMBUSTION PRODUCTS AND MOISTURE IN
THE FLUE GASES WILL CONDENSE AS THEY
LEAVE THE TERMINATION. THE CONDENSATE
CAN FREEZE ON THE EXTERIOR WALL, UNDER
THE EAVES AND ON SURROUNDING OBJECTS.
SOME DISCOLORATION TO THE EXTERIOR OF
THE BUILDING IS TO BE EXPECTED. HOWEVER,
IMPROPER LOCATION OR INSTALLATION CAN RE-
SULT IN FINISH DAMAGE TO THE BUILDING AND
MAY RE-CIRCULATE THE PRODUCTS OF COM-
BUSTION INTO THE COMBUSTION AIR TERMINAL
AND FREEZE.
Vent terminations for both Non-Direct and Direct-Vent in-
stallations must adhere to guidelines specified by the latest
edition of ANSI Z21.47 Gas-Fired Central Furnaces.
These are clearly detailed in Figure 21 for Non-Direct-Vent
installations and Figure 32 for Direct-Vent installations. In
addition to these requirements, the installation and venting
must also comply with the National Fuel Gas Code (U.S.)
and CSA-B149.1 (Canada) and the following requirements
must also be met:
NOTE: Screens of any kind on the inlet or exhaust pipes
are not permitted and will void the manufacturer's war-
ranty.
In addition to the requirements shown in Figure 21 for
Non-Direct venting and Figure 32 for Direct-Venting, the
vent must be installed with the following minimum clear-
ances:
1. The vent terminal shall have a minimum horizontal
clearance of 4 feet from electric meters, gas meters,
regulators and relief equipment.
2. Locate the furnace combustion air inlet a minimum of 3
feet from the vent of any other gas or fuel-burning appli-
ance or clothes dryer to prevent recirculation of the flue
gases into the furnace combustion air inlet. The only
exception to this requirement is the case of multiventing
two or more furnaces, which is covered in the section
on multiventing of these instructions.
In addition to the minimum clearances listed above and in
Figure 21 (Non-Direct Vent) and Figure 32 (Direct-Vent),
the vent location should also be governed by the following
guidelines.
1. Avoid terminating under any kind of patio or deck. How-
ever, if necessary, vent piping may be installed under a
deck as long as the termination(s) is (are) not under the
deck.
2. If installing the vent under a deck, insulate it to insure
that no condensate freezes and blocks the pipes.
3. Do not terminate in any area or behind any obstruction
that may allow the flue products to become stagnant
and/or re-circulate.
4. Do not locate on the side of a building with prevailing
winter winds. This will help prevent moisture from
freezing on the walls and overhangs (under eaves).
5. Do not extend the vent directly through brick or ma-
sonry surfaces. Use a rust-resistant sheet metal or
plastic backing plate behind the vent.
6. Avoid locating too close to shrubs as condensate may
stunt growth or kill them.
GUIDELINES
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