{"product_id":"qbp267162","title":"Perko Cowl Ventilator, 3 in Duct, Chrome-Plated Zinc Alloy, Black Polymer Base","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Perko 1312DP0CHR is a cowl ventilator for passive airflow through a 3\" duct on a boat. It uses a chrome plated zinc alloy cowl with a black polymer base, and the vent opening measures 8 square inches in a compact housing that is 5-3\/4\" long, 4-3\/8\" wide, and 2-5\/8\" high.\u003c\/p\u003e\u003cp\u003eThe 3\" duct threads into the ventilator neck, so hose clamps are not required at that connection. This makes it a straightforward choice for cabins, lockers, and other enclosed spaces where you want fresh air moving through the boat without adding powered ventilation.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eChrome plated zinc alloy cowl with black polymer base\u003c\/li\u003e\n\u003cli\u003eFits 3\" ducting, with the duct threading directly into the neck\u003c\/li\u003e\n\u003cli\u003eHose clamps are not required at the duct connection\u003c\/li\u003e\n\u003cli\u003e8 square inch cowl opening for passive ventilation\u003c\/li\u003e\n\u003cli\u003eCompact overall size of 5-3\/4\" x 4-3\/8\" x 2-5\/8\"\u003c\/li\u003e\n\u003cli\u003eInstalls through a 3-1\/2\" round cutout\u003c\/li\u003e\n\u003cli\u003eMounts with four #8 screws or bolts\u003c\/li\u003e\n\u003cli\u003eVentilator top secures to the base with the supplied 8-32 x 3\/8\" stainless steel screw\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eInstallation and fit\u003c\/h6\u003e\u003cp\u003eInstallation calls for a 3-1\/2\" round hole through the mounting surface and enough clearance below for a 3\" duct run. The base fastens with four #8 screws or bolts, so it is best suited to a flat mounting area where the fasteners and duct can be set cleanly.\u003c\/p\u003e\u003cp\u003eThe top section inserts into the forward part of the base at about a 45 degree angle before the rear is lowered into place and secured. That gives the vent a tidy finished look once installed and keeps the assembly mechanically simple.\u003c\/p\u003e\u003ch6\u003eUse on board\u003c\/h6\u003e\u003cp\u003eThis vent is a good match for boat owners adding passive ventilation to a cabin, locker, or similar enclosed space where a compact footprint matters. It also suits refit work where an existing 3\" duct run is already in place or where you want a threaded duct connection instead of a clamp-on hose joint.\u003c\/p\u003e\n\u003cspan itemprop=\"mpn\" hidden\u003e1312DP0CHR\u003c\/span\u003e","brand":"Perko","offers":[{"title":"Default Title","offer_id":53766146850997,"sku":"QBP267162","price":50.81,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/0372779_qbp267162_jpeg.jpg?v=1794626787","url":"https:\/\/www.qualityboatparts.com\/products\/qbp267162","provider":"Quality Boat Parts","version":"1.0","type":"link"}