Direct Venting; Option 1: Standard Vertical Direct Vent Termination - Rheem R95P Installation Instructions Manual

GENERAL VENTING REQUIREMENTS AND
GUIDELINES
DIRECT VENT
ALL FURNACE INSTALLATIONS MUST COMPLY
WITH THE NATIONAL FUEL GAS CODE AND
LOCAL CODES TO PROVIDE ADEQUATE COMBUS-
TION AND VENTILATION AIR FOR THE FURNACE.
FAILURE TO DO SO CAN RESULT IN EXPLOSION,
FIRE, PROPERTY DAMAGE, CARBON MONOXIDE
POISONING, PERSONAL INJURY OR DEATH.
READ AND FOLLOW THE GENERAL VENTING RE-
QUIREMENTS AND GUIDELINES OF THIS MANUAL
FOR ADDITIONAL VENTING REQUIREMENTS PER-
TAINING TO ALL FURNACE INSTALLATIONS (IN-
CLUDING DIRECT AND NON-DIRECT VENTING).
FAILURE TO FOLLOW ALL INSTRUCTIONS IN THIS
MANUAL CAN RESULT IN EQUIPMENT FAILURE,
EQUIPMENT DAMAGE, PROPERTY DAMAGE, PER-
SONAL INJURY OR DEATH.
OPTION 1: STANDARD VERTICAL DIRECT-VENT TERMINATION
Figure 22 below shows a standard vertical termination for direct venting installations. Maintain the dimensions specified in
this drawing for vertical venting of direct-vent furnace installations. Specific details of the roof penetration can be found in
Figure 23.
FIGURE 22
DIRECT VENT FURNACE PENETRATIONS
ROOF INTAKE/VENT
58
DIRECT-VENT (2-PIPE)
INSTALLATIONS
The field-supplied vent system used for direct-vent installa-
tions uses 2 pipes; one inlet pipe for supplying the com-
bustion air to the furnace, and an exhaust (or flue) pipe for
transferring the flue products to the outside. The flue pipe
is elevated at least 12 inches above the air intake pipe for
all vertical installations to prevent flue gas recirculation
during operation.
The furnace combustion air inlet must be located a mini-
mum of 3 feet from the vent of any other gas or fuel-burn-
ing appliance 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 multivent-
ing two or more furnaces, which is covered in the section
on multiventing of these instructions.
Direct-Vent systems must be installed so that the vent and
combustion air intake pipes terminate in the same atmos-
pheric pressure zone.
12" VERTICAL SEPARATION
BETWEEN COMBUSTION AIR
INTAKE AND VENT.
SEE FIGURE 23 FOR
MORE INFORMATION
ST-A1194-18
FIG J