{"product_id":"ac-infinity-4-inch-inline-duct-fan-silencer-15-noise-reducing-muffler-galvanized-steel-with-neoprene-foam","title":"AC Infinity 4-inch Inline Duct Fan Silencer — 15\" Noise-Reducing Muffler, Galvanized Steel with Neoprene Foam","description":"\u003cstrong\u003eAC Infinity's 4-inch Inline Duct Fan Silencer is a 15-inch muffler built to cut inline fan noise up to 50% while preserving airflow for grow tents, bathrooms, and HVAC systems.\u003c\/strong\u003e\n\n\u003cp\u003eThis inline duct silencer from AC Infinity blends durable materials and acoustical design to tame sound generated by inline fans. Its galvanized steel housing and dual aluminum flanges offer structural strength and vibration isolation, while the internal neoprene foam in an egg-crate pattern attenuates turbulent and mechanical noise. Sized for 4-inch ducting and weighing just over two pounds, the unit is compact enough for tight installations yet long enough to noticeably reduce audible fan noise without obstructing airflow.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this muffler reduce fan noise without choking airflow?\u003c\/h3\u003e\n\u003cp\u003eThe silencer reduces noise by absorbing sound energy inside a purposely shaped foam lining rather than by constricting the duct. The egg-crate neoprene foam dissipates both low- and mid-frequency noise from fan blades and motor vibration, while the flanges and steel body minimize structure-borne sounds.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eEgg-crate neoprene foam attenuates turbulent and mechanical noise.\u003c\/li\u003e\n  \u003cli\u003eDual aluminum flanges decouple vibration from the duct run.\u003c\/li\u003e\n  \u003cli\u003eGalvanized steel tube preserves a smooth through-path for air.\u003c\/li\u003e\n  \u003cli\u003eDesigned length (15\") balances attenuation and airflow resistance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the physical specs and installation considerations?\u003c\/h3\u003e\n\u003cp\u003eThis muffler is engineered for 4-inch duct openings and measures approximately 15 inches long with a corrosion-resistant galvanized steel shell. It’s lightweight for easy mounting, and the flanges allow straightforward coupling to standard duct fittings and flexible ducting with clamps or zip ties.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDuct opening diameter: 4 inches — fits standard 4\" ducts.\u003c\/li\u003e\n  \u003cli\u003eOverall length: 15 inches — compact for confined spaces.\u003c\/li\u003e\n  \u003cli\u003eWeight: 2.30 pounds — easy to suspend or bracket.\u003c\/li\u003e\n  \u003cli\u003eMaterials: galvanized steel body, aluminum flanges, neoprene foam liner.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIn which environments does this muffler perform best?\u003c\/h3\u003e\n\u003cp\u003eThe silencer is suitable for a wide range of small-duct applications: grow tent ventilation, bathroom exhaust lines, inline booster fans, and other small HVAC uses. Its corrosion-resistant shell tolerates humid environments and temperature fluctuations common in grow rooms and bathrooms.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDesigned for grow tents and indoor horticulture ventilation systems.\u003c\/li\u003e\n  \u003cli\u003eWorks with bathroom and kitchen exhaust ducts to reduce noise transmission.\u003c\/li\u003e\n  \u003cli\u003eCompatible with inline booster or mixed-flow fans where a 4\" connection is used.\u003c\/li\u003e\n  \u003cli\u003eDurable materials resist corrosion in humid or variable-temperature spaces.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho this is for: Installers, hobby growers, and homeowners who need to quiet small inline fans without sacrificing airflow will find this AC Infinity muffler useful. It’s geared toward anyone fitting 4-inch ducting who wants a durable, easy-to-install solution that reduces audible fan noise by using acoustic materials and vibration-isolating flanges. If you need a compact, corrosion-resistant silencer to improve the comfort and discretion of mechanical ventilation in a confined space, this accessory is a practical choice.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Will this fit my 4-inch inline fan?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — it’s made for standard 4-inch ducting and couples easily to most 4\" inline fans and flexible ducts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How much noise reduction can I expect?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The neoprene foam design can reduce audible fan noise by up to about 50%, depending on fan type and mounting.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AC Infinity","offers":[{"title":"Default Title","offer_id":56837426151764,"sku":"B0829GJ5Q7","price":100.51,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/ac-infinity-front-profile-duct-silencer.jpg?v=1787059577","url":"https:\/\/gardenluxe.co.uk\/products\/ac-infinity-4-inch-inline-duct-fan-silencer-15-noise-reducing-muffler-galvanized-steel-with-neoprene-foam","provider":"Gardenluxe Uk","version":"1.0","type":"link"}