13
Venting
A
CAUTION:
Proper installation of flue venting is
critical for the safe and efficient operation of the pool
heater.
General
Appliance Categories
Heaters are divided into four categories based on the
pressure produced in the exhaust and the likelihood of
condensate production in the vent.
Category I
– A heater which operates with a non-positive
vent static pressure and with a vent gas temperature that
avoids excessive condensate production in the vent.
Category II
– A heater which operates with a non-positive
vent static pressure and with a vent gas temperature that
may cause excessive condensate production in the vent.
Category III
– A heater which operates with a positive
vent pressure and with a vent gas temperature that avoids
excessive condensate production in the vent.
Category IV
– A heater which operates with a positive vent
pressure and with a vent gas temperature that may cause
excessive condensate production in the vent.
See
Table H
for appliance category requirements.
Combustion
Air Supply
Exhaust Configuration
Heater Venting
Category
Certified Vent Materials
Combustion Air
Inlet Material
From Inside Building
Vertical Venting
I
Fan
B-Vent
Equivalent
Horizontal Through-the-Wall
Venting
III
UL 1738
Metallic Vent
(such as AL29-4C)
From Outside Building
(Direct Vent or Ducted
Combustion Air)
Vertical Venting with Ducted
Combustion Air
I
Fan
B-Vent
Equivalent
Galvanized Steel,
PVC, ABS,
CPVC
Vertical
Direct Vent
III
UL 1738
Metallic Vent
(such as AL29-4C)
Horizontal
Direct Vent
III
UL 1738
Metallic Vent
(such as AL29-4C)
Table H. Venting Category Requirements
NOTE:
For additional information on appliance
categorization, see the ANSI Z21.13 Standard and the
NFGC (U.S.), or B149 (Canada), or applicable provisions
of local building codes.
A
WARNING:
Contact the manufacturer of the vent
material if there is any question about the appliance
categorization and suitability of a vent material for
application on a Category I vent system. Using improper
venting materials can result in personal injury, death or
property damage.
Description
(Terminations)
Manufacturer
Manufacturer
Model Number
Through-the-wall
Duravent
FSTB4
Horizontal Tee
Duravent
FSTT4
Horizontal Tee
Z-Flex
2SVSTTF04
Wall Thimble with
Damper
Duravent
PRTFSWTT4
90-degree Elbow
Z-Flex
2SVSTEX0490
D15 - Vertical
Horizontal Cap
Raypak
014289
Table I. Vent Terminations
Note
: For appliance adapter
use Duravent FSAAU4.
Summary of Contents for AVIA 264A
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