User Guide

RH180 Manual 19
Venng Requirements
Masonry Vercal Venng
Masonry Chimneys shall be built and installed in accordance with NFPA 211, Standard for Chimneys, replaces,
Vents and Solid Fuel-Burning Appliances.
Before assembling the vent connector to a chimney, the chimney must be inspected for signs of obstrucon or
damage. If previously used for solid or liquid fuel burning appliances or replaces, the chimney must be cleaned.
Do not connect the vent of this water heater to a chimney servicing a separate solid fuel burning appliance.
Do not connect the vent of this water heater to a le lined masonry chimney. The chimney must be lined with
either B-Vent or a listed chimney lining system.
Connecon to a chimney must be rmly aached, sealed and must be located above the extreme boom of the
chimney.
B-Vent Vercal Venng
Vercal gas vent must be installed with U.L. listed type B-vent material in accordance with the manufacturer’s
installaon instrucons and the requirements stated in the “Naonal Fuel Gas Code”, NFPA 54, ANSI Z223.1-
latest edion and the requirements of local codes.
Vent should extend in a generally vercal direcon. Any vent angle less than 45 degrees is considered horizontal.
The total horizontal distance of the vent system plus the horizontal length of the vent connector must not
exceed 75 percent of the vercal height of the vent.
An unused chimney or masonry enclosure may be used as a chase for the installaon of listed B-vent material.
Common Venng
As a Category I appliance, this water heater can be vented vercally with type B-1 vent systems and lined
masonry chimneys. Follow the Naonal Fuel Gas Code, ANSI Z223.1 and or the Naonal Gas Installaon code,
CSA-B149.1 & .2 for proper installaon pracces. If you are unsure or need assistance in correct applicaon of a
common vent installaon consult the local gas authority for assistance in the vent system design.