EASY-TO-INSTALL: Designed for 4'' ducts. No additional mounting hardware required.
EXHAUST AND SUPPLY AIRFLOW: This exterior wall cap allows both exhaust and supply airflow through a hole in the building envelope.
LONG LIFE, GUARANTEED: Panasonic ventilation fans, switches, modules, and accessories are high-quality and built to last. Included 3-year limited warranty.
PANASONIC ADD-ON: Designed for use with WhisperComfort and Intelli-Balance 100 ERV models.