Installation Manual

Demand Duo™ H-Series Installation and Operation Manual 31
1. Remove and discard screw from combustion
air vent connection.
2. Remove and discard the combustion air
vent cap.
3. Install the combustion air vent pipe. Ensure it
is properly seated.
Secure the combustion air vent pipe to the
combustion air vent connection with the
supplied screw.
4. Place the vent screen or room air screen
inside elbow and secure with the supplied
screw. Use the room air screen for
environments where room air is dusty.
5. Install the exhaust vent pipe. Ensure it is
properly seated.
Secure the exhaust vent pipe to the exhaust
adapter ring with the supplied screw.
Combustion Air Vent
Pipe
Supplied
screw
Supplied
screw
Supplied
screw
Exhaust Vent Pipe
Non-Direct Vent (Room Air) Installation
Instructions
Non-Direct Vent (Room Air)
2
Elbow
Vent
Screen
• 2 in. vent screen supplied with water
heater.
• Room air screen is available as an
accessory.
NOTE
Glue elbow to the combustion air PVC vent pipe
per manufacturer’s instructions.
Figure 32
Figure 33
Figure 34
Figure 35
Figure 36