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INSTALLATION KIT: Designed for use with WhisperLine fans, this kit includes two inlet grilles(4''), two backdraft dampers(4''), twelve clamps, and one Y-Adaptor(6''-4''x2).
LONG LIFE, GUARANTEED: Panasonic ventilation fans, switches, modules, and accessories are high-quality and built to last. Included 3-year limited warranty.
WHISPERLINE VENTILATION: Designed for residential or light commercial applications, WhisperLine ventilation fans (sold separately) can quietly exhaust air from multiple points.
CODE COMPLIANT: WhisperLine fans can be used to comply with ASHRAE 62.2, LEED, IAP, California Title 24, and WA Ventilation Code.