{"product_id":"vivosun-m4-4-ec-motor-inline-fan-195-cfm-variable-speed-quiet-energy-efficient-ventilation","title":"VIVOSUN M4 4\" EC Motor Inline Fan — 195 CFM Variable-Speed, Quiet Energy-Efficient Ventilation","description":"\u003cp\u003e\u003cstrong\u003eThe VIVOSUN M4 4\" EC Motor Inline Fan is a compact, variable-speed mixed-flow ventilator delivering up to 195 CFM of quiet, energy-efficient airflow for grow tents, rooms, and HVAC upgrades.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThe M4 pairs an electronically commutated (EC) motor with a mixed-flow impeller to balance strong airflow, low electrical draw, and subdued sound. Built-in PWM speed control, safety cutoffs, and a removable housing make installation, adjustment, and routine cleaning straightforward. This description explains how the fan performs, how to use it, and which setups will benefit most.\u003c\/p\u003e\n\n\u003ch3\u003eHow powerful and quiet is this 4\" inline fan?\u003c\/h3\u003e\n\u003cp\u003eThe fan’s EC motor spins up to 2800 RPM and produces a rated 195 CFM, designed to move significant air from a compact duct size. Its motor and impeller geometry reduce turbulence and noise; operating sound is specified at about 28 dB under typical conditions.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRated airflow: 195 CFM for rapid air exchange in small to medium enclosures\u003c\/li\u003e\n  \u003cli\u003eMax speed: 2800 RPM for strong extraction or intake\u003c\/li\u003e\n  \u003cli\u003eNoise level: approximately 28 dB for near-silent operation\u003c\/li\u003e\n  \u003cli\u003eEnergy efficiency: EC motor reduces power consumption versus standard AC fans\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow do I control speed and set it up in my grow tent?\u003c\/h3\u003e\n\u003cp\u003ePWM-based control lets you pick from discrete speed levels using a simple knob so you can match airflow to plant stage or room size. The fan includes intake and exhaust flanges with locking tabs plus a 5.9 ft power cord, making duct and power connections fast and secure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePWM knob: three selectable speed positions for fine-tuning airflow\u003c\/li\u003e\n  \u003cli\u003eFlanged ends with locking tabs: secure vent hose attachment without tools\u003c\/li\u003e\n  \u003cli\u003e5.9 ft cord: flexible placement and routing options in tents or rooms\u003c\/li\u003e\n  \u003cli\u003eDetachable components: housing and impeller remove easily for cleaning\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat safety and durability features are included?\u003c\/h3\u003e\n\u003cp\u003eThe M4 uses an ETL-listed EC motor with built-in locked-rotor protection and an automatic reset function to reduce the risk of damage from obstructions or overheating. An electrical junction box made from flame-retardant material adds extra protection where wiring is present.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eLocked-rotor protection: cuts power if blades are blocked and resets automatically\u003c\/li\u003e\n  \u003cli\u003eAutomatic reset: restores operation after safe conditions return\u003c\/li\u003e\n  \u003cli\u003eETL listing: third-party confirmation of electrical safety standards\u003c\/li\u003e\n  \u003cli\u003eFlame-retardant junction box: improves fire safety around wiring connections\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIn what environments does this fan work best?\u003c\/h3\u003e\n\u003cp\u003eDesigned for horticulture and small-space ventilation, this inline fan excels in grow tents, grow rooms, basements, and any setting needing dependable airflow control. It can be used as an extractor to remove stale air or as an intake booster to increase fresh air delivery, helping manage temperature and humidity without large-scale HVAC equipment.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eGrow tents and rooms: steady extraction and circulation for controlled environments\u003c\/li\u003e\n  \u003cli\u003eBasements and utility spaces: improved air exchange and odor control\u003c\/li\u003e\n  \u003cli\u003eSupplemental HVAC: targeted airflow where larger systems are impractical\u003c\/li\u003e\n  \u003cli\u003ePortable setups: compact size fits 4\" ducting and confined spaces\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The VIVOSUN M4 4\" EC Motor Inline Fan is aimed at hobby and small-scale growers, DIY ventilation installers, and anyone who needs a quiet, energy-conscious inline fan for compact ductwork. If you want precise speed control, easy mounting and maintenance, and a safety-certified motor in a small footprint, this model 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: Can the M4 run continuously?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The ETL-listed EC motor is designed for continuous use, and locked-rotor protection with auto-reset helps guard against overheating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What duct size is required for this fan?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Use 4-inch ducting — the fan’s flanges are sized for standard 4\" vents with locking tabs for secure attachment.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"VIVOSUN","offers":[{"title":"Default Title","offer_id":56824127717716,"sku":"B0DGGCP1J5","price":76.69,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1063\/2652\/4244\/files\/vivosun-m4-front-view.jpg?v=1786980772","url":"https:\/\/gardenluxe.co.uk\/products\/vivosun-m4-4-ec-motor-inline-fan-195-cfm-variable-speed-quiet-energy-efficient-ventilation","provider":"Gardenluxe Uk","version":"1.0","type":"link"}