Rinnai ENERGYSAVER EX08C Installation Fundamentals page 61

Vent Extension Installation Requirements
The following is an overview of guidelines and installation of Rinnai Direct
Vent Furnace vent extensions. This is not a substitute for any current
installation / owner's manual or vent instructions.
• The 08 series can not use vent extensions.
• See each model's owner's / installation manual for permissible vent lengths.
• The vent termination must ALWAYS be horizontal.
• Vent extensions installed in ANY unconditioned air space MUST be insulated with high
temperature insulation and must be accessible.
• All pipe stoppers, connectors, screws and hangars must be used in accordance to their
instructions. The seals must be air tight for both the intake and exhaust air supply hoses.
• The intake air hose must equal the exhaust hose length to maintain a balanced flue system.
• The humidifier trays are made of enamel covered steel to resist rust and corrosion from the
condensate draining back to the unit.
• The 38 series tray cannot be removed from the unit.
• The 08, 11, 17, and 22 series trays can be removed for cleaning but must be replaced before
operation of the unit.
• Overflow of the humidifier tray is an indication that the venting extension was possibly installed
incorrectly. No warranty claim will be approved covering overflow.
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