Commercial Hybrid System
7
Combustion Air Requirements
Room air can
only
be used in applications that utilize either the approved Rinnai common vent method, or the
commercial hybrid system (Refer to Rinnai Common Vent manual for further details regarding common vented
applications)
This water heater requires adequate combustion air for ventilation and dilution of flue gases. Failure to provide
adequate combustion air can result in unit failure, fire, explosion, serious bodily injury or death. Use the detailed
description in the C199 installation and operation manual to ensure adequate combustion air is available for
correct and safe operation of this water heater.
REFER TO THE C199 MANUAL FOR SPECIFIC DETAILS ON:
Determining Vent Configuration
Combustion Air Requirements
Combustion Air Check Valve
(Included with System)
Part # 109000533
Room Air in Single Unit Applications
Room air can be used for combustion air in
commercial hybrid system applications
only.
Single unit room air applications
must
terminate
vertically
Single unit horizontal termination is not permitted.
Single unit room air applications must use the
combustion air check valve provided.
