{"product_id":"vivosun-r4-4-inch-inline-duct-fan-190-cfm-with-variable-speed-controller","title":"VIVOSUN R4 4-Inch Inline Duct Fan – 190 CFM with Variable Speed Controller","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\n\u003cp\u003eThe VIVOSUN R4 4-Inch Inline Duct Fan is designed to move air efficiently in compact spaces, making it a versatile choice for grow tents, bathrooms, basements, and small workshops. Its reinforced plastic housing highlights durability, while the combined axial-centrifugal design helps push and pull air through ducting with minimal resistance, promoting steadier ventilation across your setup.\u003c\/p\u003e\n\u003ch3\u003eKey capabilities\u003c\/h3\u003e\n\u003cp\u003eOperating up to roughly 2300 RPM, this fan delivers up to 190 CFM of airflow. The result is steady air exchange that can help moderate humidity, reduce heat buildup, and support a more balanced indoor climate—without overpowering the room’s soundscape.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDurable, energy-efficient housing built for long-lasting use\u003c\/li\u003e\n  \u003cli\u003eAirflow up to 190 CFM at 2300 RPM for dependable ventilation\u003c\/li\u003e\n  \u003cli\u003eLow noise operation designed to stay discreet during long runs\u003c\/li\u003e\n  \u003cli\u003eStepless, on-cord speed control for customized airflow\u003c\/li\u003e\n  \u003cli\u003eCompact, lightweight form with an installation bracket and easy-to-use duct ends\u003c\/li\u003e\n  \u003cli\u003eVersatile for indoor grow rooms, bathrooms, basements, and small workshops\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuiet, adjustable ventilation\u003c\/h3\u003e\n\u003cp\u003eThe R4 emphasizes quiet performance: durable blades work together to minimize disruption while maintaining reliable airflow. The on-cord speed controller lets you dial in the airflow for different tasks, whether extracting moisture, reducing heat, or circulating air during setup changes.\u003c\/p\u003e\n\u003ch3\u003eSimple installation and flexible setup\u003c\/h3\u003e\n\u003cp\u003eDesigned for tight spaces, the fan is compact and lightweight. It ships with an installation bracket that clearly indicates airflow direction and removable duct ends with locking tabs, making mounting straightforward and adaptable to existing ductwork.\u003c\/p\u003e\n\u003ch3\u003eSmart placement ideas\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGrow tents: promote consistent air exchange to balance humidity and temperature\u003c\/li\u003e\n  \u003cli\u003eBathrooms and kitchens: help remove excess moisture and odors\u003c\/li\u003e\n  \u003cli\u003eBasements and workshops: maintain airflow to reduce moisture buildup and heat pockets\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eNote: benefits described reflect typical capabilities and setup scenarios. Actual results depend on space, ductwork, and placement.\u003c\/p\u003e\n\u003ch3\u003eSpecifications at a glance\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDiameter: 4 inches\u003c\/li\u003e\n  \u003cli\u003eAirflow: up to 190 CFM\u003c\/li\u003e\n  \u003cli\u003eSpeed range: 0–2300 RPM (variable)\u003c\/li\u003e\n  \u003cli\u003eNoise: typically under 30 dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWhether you’re building a compact grow tent, upgrading a bathroom vent, or improving a small workshop’s air exchange, the VIVOSUN R4 offers flexible, adjustable ventilation that can adapt to your space and needs.\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: What airflow does the VIVOSUN R4 provide in a 4-inch duct setup?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: The R4 delivers up to 190 CFM at 2300 RPM with adjustable speed for tailored ventilation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the R4 easy to install in tight grow tent spaces?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It includes an installation bracket, removable duct ends, and a compact, lightweight design for simple mounting.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"VIVOSUN","offers":[{"title":"Default Title","offer_id":43992781619334,"sku":"B01DXYMGOM","price":83.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0665\/1602\/5478\/files\/vivosun-r4-inline-duct-fan-front-view.jpg?v=1779050237","url":"https:\/\/patiozora.com\/products\/vivosun-r4-4-inch-inline-duct-fan-190-cfm-with-variable-speed-controller","provider":"PatioZora","version":"1.0","type":"link"}