EcoVent from Panasonic Eco Products Division is an Energy Star-rated bath fan that incorporates a Veri-Boost feature to ensure airflow requirements are achieved without compromising style. Universal contractor packs eliminates the risk of losing or damaging parts, allowing components to be stored safely and separately on site. The ventilation fan includes a 4 in. duct adaptor and a low-profile housing that fits in 2- by 6-in. construction.