{"product_id":"638-131","title":"638-131","description":"This premium 3-inch to 4-inch metal vent increaser is a professional-grade ducting adapter designed to transition smaller ventilation outlets to larger exhaust systems. Essential for HVAC installations, clothes dryer venting, and bathroom exhaust fans, this durable metal coupler ensures a secure and airtight fit between 3\" and 4\" pipes. Constructed from high-quality, heat-resistant metal, it is built to withstand the rigors of both hot and cold air exhaust, improving airflow efficiency throughout your home ventilation system. Whether you are performing a DIY repair or a new appliance installation, this duct increaser helps bridge the gap between varying duct sizes while maintaining optimal pressure and reducing lint or debris buildup.\u003cbr\u003e\nType: Metal Venting \/ Ducting Adapter\u003cbr\u003e\nSize: 3 inch to 4 inch\u003cbr\u003e\nDimensions: 4 inches × 3 inches\u003cbr\u003e\nApplication: Commonly used in clothes dryers, bathroom exhaust fans, range hoods, and general HVAC ductwork to transition from a 3-inch appliance outlet or pipe to a standard 4-inch ventilation line.\u003cbr\u003e\nSpecifications: Heavy-duty metal construction for enhanced durability and heat resistance; crimped on one end for easy installation; compatible with rigid and semi-rigid ducting.","brand":"BCFurnace","offers":[{"title":"3\" TO 4\" INCREASER \/ 638-131","offer_id":47251935232285,"sku":null,"price":20.4,"currency_code":"CAD","in_stock":true},{"title":"3\" TO 4\" INCREASER \/ 136230","offer_id":47251935265053,"sku":null,"price":20.4,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0836\/7298\/9981\/files\/2b4e1ece79c44827b080a4f5bb0d67c7.webp?v=1773959709","url":"https:\/\/bcfurnace.myshopify.com\/products\/638-131","provider":"BCFurnace","version":"1.0","type":"link"}