Selkirk 3" to 4" Appliance Increaser (Round - Type B Gas Vent) d31.2 Smart-Heat Link RS232 Plugin

Smart-Heat Link RS232 Plugin

Standard with bird screen

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Selkirk 3" to 4" Appliance Increaser (Round - Type B Gas Vent) d31.2 Smart-Heat Link RS232 PluginSelkirk 3" to 4" Appliance Increaser 103244 (3RV AI4) Increase 3" to 4" only. Only for use with Rheem Rudd appliances. (RV) Round Type B Gas Vent Model RV Double Wall Gas Vent is the installer's choice for residential, industrial and light commercial applications. The aluminum liner heats up quickly to promote strong draft. Galvanized outer provides protection against outdoor elements. Product line includes DWC Double Wall Connectors and EFC