# AC Infinity CLOUDLINE PRO S4 Inline Duct Fan 4” (100mm) | Quiet EC Motor Ventilation for Grow Tents & AV Closets **Brand:** AC Infinity **SKU:** rth0681 **ASIN:** B07JB292JC **Canonical URL:** https://crowcrowcrow.com/p/infinity-cloudline-quiet-inline-duct-fan-2/rth0681 **Category:** home-kitchen **Subcategory:** Categories **Availability:** in_stock **Price (INR, all-inclusive):** ₹18,055 **Discount:** 1% **Customer rating:** 4.88/5 from 8 ratings ## Description AC Infinity CLOUDLINE PRO S4 4-inch inline duct fan (205 CFM) quietly ventilates grow tents, boosts HVAC, and cools AV closets. Features a PWM EC motor, 10-speed controller, and durable dual ball bearings. Imported from authorized US retailers, all duties included. Arrives via 28-32 days. ## Highlights - Quiet 28 dBA Operation — Runs at a whisper-quiet 28 dBA, ensuring minimal noise disruption in your grow space or AV closet, unlike louder local exhaust fans. - Energy-Efficient EC Motor — PWM-controlled EC motor uses significantly less energy than AC motors, saving on electricity bills over time for continuous operation. - Versatile 10-Speed Control — Precisely adjust airflow from 10 speed levels to match your specific ventilation needs, from gentle circulation to powerful exhaust. - Durable Dual Ball Bearings — Rated for 67,000 hours, these bearings ensure long-term reliability and allow the fan to be mounted in any orientation. ## Key features - Designed to ventilate grow tents, transfer heating/cooling to rooms, circulate air, exhaust odors, and cool AV racks. - Features a wired 10-speed fan controller; also compatible with all UIS controllers with intelligent programming. - PWM-controlled EC motor provides quiet and energy-efficient performance with minimal heat and noise. - Mixed flow design with stator blade and hydrodynamic wind circles enables airflow delivery in high resistance areas. - Duct Size: 4” | Dimensions: 6.9 x 11.9 x 7.4 in. | Airflow: 205 CFM | Noise: 28 dBA | Bearings: Dual Ball ## Why choose this product **Engineered for Performance & Efficiency** — The AC Infinity CLOUDLINE PRO S4 utilizes a mixed-flow design with stator blades and hydrodynamic wind circles, enabling it to maintain strong airflow even in high-resistance ducting systems. Its PWM-controlled EC motor is exceptionally energy-efficient, running smoothly at low RPMs without generating significant heat or noise. This advanced engineering ensures reliable ventilation for your sensitive equipment or grow environments, outperforming many basic fans that struggle with static pressure. **Ideal for Grow Tents & AV Cooling** — This fan is perfect for maintaining optimal air quality and temperature in hydroponic grow tents, boosting heating/cooling to rooms, and cooling AV equipment closets. It effectively exhausts odors and circulates fresh air. Skip this fan if you need a system for whole-house HVAC or require a fan specifically designed for high-pressure industrial ducting systems; consider a larger diameter fan for significantly larger spaces. ## How to use 1. Securely mount the AC Infinity CLOUDLINE PRO S4 fan inline within your ducting system, ensuring it's oriented correctly for airflow direction. Use the included mounting hardware for horizontal or vertical installation. — Mount the Fan 2. Attach 4-inch diameter duct hoses to both the intake and exhaust ports of the fan. Use appropriate clamps to ensure a secure, airtight seal to prevent air leaks and maintain optimal airflow. — Connect Ducting 3. Plug the fan's power cord into the speed controller, and then plug the controller into a 220-240V Indian power outlet. Connect the controller to the fan motor using the provided cable. — Connect Controller & Power 4. Use the 10-speed settings on the controller to adjust the fan's speed and airflow to your desired level. For advanced control, connect to a UIS smart controller for programmable schedules and climate-based automation. — Set Airflow ## Product details | Field | Value | |---|---| | Motor Type | EC Motor (PWM Controlled) | | Bearings | Dual Ball Bearings (67,000 hour rating) | | Number of Blades | 10 | | Number of Speeds | 10 (via controller) | | IP Rating | IP44 | | Airflow Capacity | 205 CFM (5.8 m³/h) | | Noise Level | 28 dBA | | Wattage | 21 W | | Voltage | 220-240V (India compatible) | | Power Source | AC | | Controller Type | App Control, Button Control, Remote Control (UIS compatible) | | Programmable Features | Dynamic climate & time-based programming via UIS controller | | Cost per use | 21W fan running 24/7 for 30 days: ₹602 per day (based on average Indian electricity rates) | | Shelf life after opening | N/A (Durable Product) | | Reapplication math | N/A (Durable Product) | | Contraindications | Not suitable for whole-house HVAC systems; requires 4-inch ducting. | | Allergens / common irritants | None | | Brand | AC Infinity | | Model Name | CLOUDLINE S4 | | Part Number | AI-CLS4 | | Duct Size | 4 inches (100mm) | | Dimensions | 17.5 cm x 30.2 cm x 18.8 cm (6.9 x 11.9 x 7.4 in.) | | Item Weight | 2.61 kg (5.75 lb) | | Material | Polycarbonate | | Color | Pro Speed Controller for S4 | | Finish Type | Matte | | Mounting Type | Versatile Mounting (Horizontal or Vertical) | | Country of Origin | Not stated by manufacturer — US retail version, sourced from authorized US retailers | ## Frequently asked questions ### What fan size do I need for my grow tent? For grow tents, match the fan's airflow (CFM or m³/h) to your tent volume. A common rule is to exchange the tent's air volume several times per minute. The AC Infinity CLOUDLINE PRO S4 offers 205 CFM, suitable for smaller to medium tents. Ensure the 4-inch duct diameter matches your filter and ducting for optimal performance. ### Will this ventilation equipment work on Indian power? Yes, this AC Infinity CLOUDLINE PRO S4 fan is rated for 220-240V, compatible with Indian mains power. It comes with a standard US plug, so you may need a Type C/D/M adapter. The EC motor ensures efficient operation and minimal heat generation. ### How to use the AC Infinity CLOUDLINE PRO S4 fan? Mount the fan inline with your ducting system, connecting the 4-inch ducts to both ends. Connect the power adapter and the speed controller. Use the 10-speed settings or UIS controller to adjust airflow and noise levels for optimal ventilation in your grow tent or AV closet. ### What are the benefits of an EC motor fan? EC (Electronically Commutated) motors are highly energy-efficient, consuming less power than traditional AC motors, which can lead to significant electricity savings over time. They also operate more quietly and generate less heat, contributing to a more stable environment for your plants or equipment. ### How to choose an inline duct fan for odor control? For effective odor control, pair your inline duct fan with a compatible activated carbon filter. The fan's CFM rating should be sufficient to pull air through the filter and exhaust it effectively. The AC Infinity CLOUDLINE PRO S4's 205 CFM and 4-inch duct size are suitable for smaller grow tents or enclosures when matched with an appropriate carbon filter. ### What is the best electric fan for a laser engraver enclosure? A quiet inline duct fan like the AC Infinity CLOUDLINE PRO S4 is excellent for laser engraver enclosures. It effectively exhausts fumes and burnt wood smell, preventing them from spreading. Ensure you use 4-inch ducting throughout the system for optimal airflow and connect it to a carbon filter if needed. ### Are there side effects to using inline duct fans? When used correctly for ventilation, inline duct fans like the AC Infinity CLOUDLINE PRO S4 have no direct side effects. Ensure proper installation to avoid electrical hazards and maintain the recommended airflow to prevent issues like heat buildup or stagnant air. ### Can I use this fan daily for my hydroponics setup? Yes, the AC Infinity CLOUDLINE PRO S4 is designed for continuous use. Its energy-efficient EC motor and durable dual ball bearings allow for daily operation in hydroponic setups, ensuring consistent air circulation and temperature control. ## Compliance No product-specific compliance warnings identified. Standard imported-goods terms apply: customs duties & GST paid; for personal use in India; follow the manufacturer's usage instructions on the packaging. ## Images 1. https://images.crowcrowcrow.com/B07JB292JC-0.webp 2. https://images.crowcrowcrow.com/B07JB292JC-3.webp 3. https://images.crowcrowcrow.com/B07JB292JC-6.webp 4. https://images.crowcrowcrow.com/B07JB292JC-9.webp 5. https://images.crowcrowcrow.com/B07JB292JC-12.webp 6. https://images.crowcrowcrow.com/B07JB292JC-15.webp --- Source: https://crowcrowcrow.com/p/infinity-cloudline-quiet-inline-duct-fan-2/rth0681 Returns: 14 days, free pickup, full refund on genuine issues. Shipping: Free across India, 28-32 days. Prices are all-inclusive (duties + GST).