{"product_id":"lambro-industries-old143w-dryer-vent-damper-4-inch","title":"Lambro Industries OLD143W Dryer Vent Damper 4 Inch","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe LAMBRO INDUSTRIES OLD143W is a 4-inch white plastic soffit exhaust dryer vent damper designed to seal the vent opening when the dryer is not running. The damper closes automatically to block outside air, wind, pests, and moisture from entering the duct system. When the dryer operates, exhaust pressure pushes the damper open to allow airflow to exit freely. This component is installed in soffit-mounted dryer exhaust terminations and is suited for residential laundry applications. HVAC technicians and appliance installers typically handle this fitting as part of a new vent installation or a worn-damper replacement.\u003c\/p\u003e\n\u003cp\u003eThe OLD143W fits soffit exhaust terminations on 4-inch dryer vent systems in residential construction. It serves as a replacement for the Lambro 143W damper component, making it a direct-fit option for existing installations that use that configuration. Typical installations include under-eave soffit locations where the dryer exhaust duct terminates horizontally through the soffit panel. The white finish blends with standard painted or vinyl soffit materials.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e4-inch duct diameter matches standard residential dryer exhaust sizing\u003c\/li\u003e\n  \u003cli\u003eAutomatic damper closes when dryer is off, blocking backdraft and outside air intrusion\u003c\/li\u003e\n  \u003cli\u003eWhite plastic construction resists moisture and is compatible with painted or vinyl soffit panels\u003c\/li\u003e\n  \u003cli\u003eDesigned for soffit exhaust termination — suitable for under-eave installation locations\u003c\/li\u003e\n  \u003cli\u003eServes as a direct replacement for the Lambro 143W damper\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a replacement for the Lambro 143W soffit exhaust dryer vent damper. Fits 4-inch dryer exhaust duct terminations in residential soffit applications.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by an HVAC technician or experienced installer. Disconnect and lock out the dryer before working on the vent termination. Ensure the soffit opening is clear and that the duct connection is properly sealed to prevent exhaust leakage into the wall or attic cavity. Local mechanical codes, including IRC Section M1502, govern dryer exhaust duct termination requirements and should be consulted before installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDuct Diameter\u003c\/strong\u003e: 4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: White\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTermination Type\u003c\/strong\u003e: Soffit exhaust\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: OLD143W\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LAMBRO INDUSTRIES","offers":[{"title":"Default Title","offer_id":51525524226354,"sku":"OLD143W","price":14.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/voomisupply.com\/products\/lambro-industries-old143w-dryer-vent-damper-4-inch","provider":"Voomi Supply","version":"1.0","type":"link"}