{"product_id":"vivosun-4-inch-inline-fan-r4-190-cfm-quiet-energy-efficient-stepless-speed-controller","title":"VIVOSUN 4-inch Inline Fan R4 — 190 CFM Quiet, Energy-Efficient, Stepless Speed Controller","description":"\u003cp\u003e\u003cstrong\u003eThe VIVOSUN R4 4\" Inline Fan delivers up to 190 CFM of quiet, energy-efficient air movement for small grow tents, bathrooms, basements and workshops.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact inline duct fan combines axial and centrifugal design features to move a steady stream of air while keeping noise and power use low. Built from reinforced plastic, the R4 is designed for continuous indoor use where reliable airflow, adjustable speed and easy installation matter. It ships with a removable mounting bracket, locking duct ends and a stepless speed controller so you can tailor performance to different rooms and setups.\u003c\/p\u003e\n\n\u003ch3\u003eHow much airflow and power does the R4 provide?\u003c\/h3\u003e\n\u003cp\u003eThe R4 produces up to 190 cubic feet per minute (CFM) at a fan speed of 2300 RPM, giving effective circulation for small to medium ventilation needs. Its blended fan design balances volume and static pressure better than a basic axial fan.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMaximum rated airflow: 190 CFM\u003c\/li\u003e\n  \u003cli\u003eTop fan speed: 2300 RPM\u003c\/li\u003e\n  \u003cli\u003eMotor-driven blower combines axial and centrifugal elements\u003c\/li\u003e\n  \u003cli\u003eReinforced plastic housing for steady performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill the fan be noisy in a home or grow space?\u003c\/h3\u003e\n\u003cp\u003eThe R4 is engineered for reduced acoustic output: smooth-blade rotation and balanced construction keep operational noise under about 30 dB in typical conditions. That level is low enough to be unobtrusive near work areas, bedrooms or small grow tents.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eTypical noise level: below 30 dB\u003c\/li\u003e\n  \u003cli\u003eDurable fan blades minimize vibration and rattle\u003c\/li\u003e\n  \u003cli\u003eSuitable for noise-sensitive rooms like bathrooms or basements\u003c\/li\u003e\n  \u003cli\u003eQuieter than many same-size inline fans under similar load\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow easy is the R4 to install and control?\u003c\/h3\u003e\n\u003cp\u003eInstallation is straightforward: the fan is compact and lightweight, with removable duct ends and locking tabs to secure ducting. A mounting bracket indicates airflow direction and the included inline stepless speed controller lets you dial the output to the exact airflow you need.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompact footprint fits tight spaces and small tents\u003c\/li\u003e\n  \u003cli\u003eInstallation bracket shows correct airflow orientation\u003c\/li\u003e\n  \u003cli\u003eRemovable duct ends with locking tabs for secure connections\u003c\/li\u003e\n  \u003cli\u003eInline stepless speed controller for precise adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat indoor uses are best suited to this fan?\u003c\/h3\u003e\n\u003cp\u003eThe VIVOSUN R4 is made for indoor ventilation tasks where space is limited but consistent airflow is required. It works well in horticulture setups, moisture-prone rooms, small workshops and ventilation runs where you need to move air quietly and efficiently.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGrow tents and small grow rooms for air exchange and circulation\u003c\/li\u003e\n  \u003cli\u003eBathroom ventilation to help reduce humidity buildup\u003c\/li\u003e\n  \u003cli\u003eBasements and laundry areas to combat stagnant air\u003c\/li\u003e\n  \u003cli\u003e3D printing or small workshop exhaust to manage heat and dust\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for? The VIVOSUN R4 4\" Inline Fan is intended for hobby growers, apartment dwellers, small workshop operators and homeowners needing a compact, quiet inline fan. If you want an affordable, easy-to-install duct fan with adjustable speed and low noise for confined indoor spaces, the R4 is a practical choice. It’s not a heavy industrial blower, but it offers reliable continuous ventilation performance where space, sound and flexibility matter.\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: Can this fan run continuously?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The R4 is built for continuous indoor use with a reinforced plastic housing and a motor designed for steady operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Does it include a speed controller?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. A stepless inline speed controller on the power cord lets you adjust airflow precisely.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"VIVOSUN","offers":[{"title":"Default Title","offer_id":56837211554132,"sku":"B01DXYMGOM","price":113.05,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/vivosun-front-view_50b3a09a-2d1e-41af-be60-0f447aad1732.jpg?v=1787059068","url":"https:\/\/gardenluxe.co.uk\/products\/vivosun-4-inch-inline-fan-r4-190-cfm-quiet-energy-efficient-stepless-speed-controller","provider":"Gardenluxe Uk","version":"1.0","type":"link"}