{"product_id":"imperial-4-in-d-cast-iron-damper","title":"Imperial 4 in. D Cast Iron Damper","description":"\u003cdiv\u003e\n\u003cp\u003e\u003cstrong\u003eImperial 4 in. D Cast Iron Damper\u003c\/strong\u003e is a sturdy, non-adjustable damper built for reliable airflow control in chimney vent systems. Crafted from durable cast iron and finished in black, this 4 in. damper is designed to withstand high heat and frequent use while maintaining a clean, unobtrusive profile in your vent work.\u003c\/p\u003e \u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eMaterial and build\u003c\/strong\u003e: Cast iron construction provides excellent heat resistance and long service life.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSize and fit\u003c\/strong\u003e: 4 in. diameter for standard small-diameter vent runs.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black finish blends with most existing chimney hardware and resists staining.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSafety and compliance\u003c\/strong\u003e: UL Listed, offering assurance of safety and compliance.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eConfiguration\u003c\/strong\u003e: Non-adjustable damper—designed for fixed installation and durable, permanent airflow control.\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003ePackaging\u003c\/strong\u003e: Bulk packaging supports installers and wholesalers stocking up efficiently.\u003c\/li\u003e\n\u003c\/ul\u003e \u003cp\u003eThis Imperial damper is ideal for contractors, chimney sweeps, and hardware retailers who need a reliable, fixed-damper solution for 4 in. vent lines. Use cases include blocking drafts in seasonal fireplaces, maintaining steady airflow in fixed vent installs, or serving as a durable, low-maintenance component in streamlined chimney assemblies.\u003c\/p\u003e \u003cp\u003eWhy choose a non-adjustable damper? When you want a simple, economical solution with fewer moving parts and a robust, heat-tolerant body, this 4 in. cast iron damper delivers steady performance with minimal upkeep. If you require adjustable airflow control, explore other models designed specifically for variable damper operation.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Imperial","offers":[{"title":"Default Title","offer_id":52169073656082,"sku":"40834","price":6.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0928\/1024\/8466\/files\/40834_A.eps_High.jpg?v=1775414791","url":"https:\/\/nationalhardwaregroup.com\/products\/imperial-4-in-d-cast-iron-damper","provider":"National Hardware Group","version":"1.0","type":"link"}