{"product_id":"lambro-industries-251-aluminum-vent-decreaser-4x3-in","title":"Lambro Industries 251 Aluminum Vent Decreaser 4x3 in","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe LAMBRO INDUSTRIES 251 is an aluminum vent decreaser designed to transition dryer or exhaust vent ducting from a 4-inch diameter to a 3-inch diameter connection. This fitting is used when duct runs require a reduction in size between sections, allowing installers to adapt vent lines to equipment outlets, wall caps, or termination points that differ in diameter. Fabricated from aluminum, the 251 offers corrosion resistance and durability in both interior and exterior vent applications. HVAC technicians and appliance installers handle this type of fitting as a standard part of duct fabrication and layout work.\u003c\/p\u003e\n\u003cp\u003eThis decreaser is suited for residential and light commercial ventilation installations where a 4-inch to 3-inch duct transition is required. Typical applications include dryer exhaust venting, bathroom exhaust fans, and range hood duct runs where the outlet or termination fitting does not match the primary duct diameter. The fitting is sold individually as a single unit.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eReduces duct diameter from 4 inches to 3 inches in a single fitting\u003c\/li\u003e\n  \u003cli\u003eAluminum construction resists corrosion in exhaust and ventilation applications\u003c\/li\u003e\n  \u003cli\u003eCompact, lightweight design at 1.2 pounds for easy handling during installation\u003c\/li\u003e\n  \u003cli\u003eSuitable for dryer exhaust, bath fan, and range hood vent runs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a standard duct transition fitting for residential and light commercial ventilation systems requiring a 4-inch to 3-inch diameter reduction.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eThis fitting is typically installed by HVAC technicians or appliance installers as part of a dryer or exhaust vent duct assembly. Disconnect power to any associated appliance before beginning duct work. Secure the decreaser to adjoining duct sections using approved foil tape or sheet metal screws as required by local mechanical codes. Avoid using this fitting in applications where a diameter reduction would restrict airflow below the minimum required by the connected appliance manufacturer.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInlet Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutlet Diameter\u003c\/strong\u003e: 3 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Aluminum\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1.2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUnit of Measure\u003c\/strong\u003e: Each\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: LAMBRO INDUSTRIES\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 251\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LAMBRO INDUSTRIES","offers":[{"title":"Default Title","offer_id":51524594565426,"sku":"251","price":79.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5ac54b99b1f1ffaf950f8ae8f87229bd.jpg?v=1785452656","url":"https:\/\/voomisupply.com\/products\/lambro-industries-251-aluminum-vent-decreaser-4x3-in","provider":"Voomi Supply","version":"1.0","type":"link"}