Installation Manual

Demand Duo™ H-Series Installation and Operation Manual 25
2 in. or 3 in.
PVC/CPVC
IPEX / Royal
Concentric
Side Wall
Termination
Configuration
2 in. or 3 in.
PVC/CPVC
IPEX /Royal
Concentric
Vertical
Termination
Configuration
2 in. or 3 in.
Schedule 40
PVC/CPVC or
ABS Snorkel
Termination
Configuration
2 in. or 3 in.
Schedule 40
PVC/CPVC or
ABS Standard
upside down
"U" Vertical Ter-
mination Con-
figuration
2 in. or 3 in.
Schedule 40
PVC/CPVC or
ABS
Elbow or Tee
Side Wall
Termination
Configuration
2 in. or 3 in.
Schedule 40
PVC/CPVC or
ABS Tee
Vertical
Termination
Configuration
2 in. or 3 in.
PVC Low
Profile
Termination
Configuration
This configuration requires the use
of a Concentric Vent Termination
Exhaust and
combuson air
MUST NOT be
brought
together into
a single PVC
pipe using a
pipe ng.
Twin Pipe Maximum Equivalent Length Table
Vent Sizes 2 in. (51 mm) 3 in. (76 mm)
Vent Lengths 65  (20 m) 150  (46 m)
• 45° elbow is equivalent to 3  (1 m)
• 90° elbow is equivalent to 6  (1.83 m)
WARNING
Twin Pipe Example Vent Applications
Twin Pipe Maximum Vent Length
Direct Vent (Twin Pipe)
1
Slope horizontal exhaust 1/4 in. per foot towards the water heater. DO NOT slope combustion air pipe
towards the water heater.
Exhaust
Combuson
Air
Single
Pipe
This configuration requires the use
of a Concentric Vent Termination