YIYOSUN 4" inline fan, carbon filter, flexible ducting, speed controller, clamps for air filtration kit.

VIVOSUN inline duct fan, carbon filter, and speed controller in a grow tent for ventilation and odor control.

Diagram: carbon filters demonstrating intake function (sucking odor in) and exhaust function (emitting fresh air out).

Air filtration kit: black inline duct fan, silver carbon filter, flexible ducting, and variable speed controller.

Exploded view of a carbon filter, highlighting its switchable flange, virgin charcoal bed, and high airflow inner/outer mesh for durability.

Air filtration kit specifications: inline fan, carbon filter, ducting, and accessories with dimensions.

Cutaway view of a black inline fan highlighting its copper-wound motor, red fan blades, and easy-to-install intake.

Vivosun Inline Fan R4 Air Filtration Kit - 4" Duct

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MODEL: WEB-306201PS-4

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Vivosun Inline Fan R4 Air Filtration Kit - 4" Duct

Struggling with heat, humidity, and odors in your grow space? The VIVOSUN Air Filtration Kit R4 4" is your all-in-one solution for powerful, quiet, and reliable ventilation. This complete three-part system includes everything you need for effective air purification and odor control, making it perfect for growers seeking a straightforward, dependable setup.

At its core, the Inline Fan R4 moves 190 CFM of air at 2300 RPM while operating at a whisper-quiet 31 dB. The included variable speed controller allows you to precisely adjust airflow from 0-100%, adapting perfectly to each stage of your grow. This kit is an essential component for any high-performance VIVOSUN grow tent, especially sizes like the 2' x 2' or 3' x 3'.

Eliminate unwanted smells with the superior 1200+ RC 412 carbon filter, packed with Australian Virgin Charcoal. The durable, triple-layer ducting ensures longevity and can handle temperatures from -22°F to 266°F, providing a secure and efficient pathway for air. It's one of the most reliable inline fan systems for maintaining a pristine growing environment.

What's Included

Inline Fan R4 4" (190 CFM, 2300 RPM)
Variable Speed Controller
4" Carbon Filter (1200+ RC 412 Grade, 4" x 14")
8-foot Heavy-Duty Ducting with Triple-Layer Construction
2 Stainless Steel Clamps
Mounting Hardware and Installation Instructions

Features

VIVOSUN Inline Fan R4 Air Filtration Kit carbon filter

VIVOSUN Inline Fan R4 Air Filtration Kit durable construction

VIVOSUN Inline Fan R4 Air Filtration Kit providing perfect ventilation

VIVOSUN Inline Fan R4 Air Filtration Kit carbon filter roles

🔄

Powerful Airflow

Delivers 190 CFM at 2300 RPM with an ultra-quiet operation under 31 dB.

🎛️

Variable Speed Control

Adjustable controller provides precise airflow from 0-100% for optimal ventilation.

🌿

Superior Odor Control

1200+ RC 412 Australian Virgin Charcoal effectively eliminates odors and particulates.

🔧

Heavy-Duty Construction

Triple-layer ducting with steel wire support handles temperatures from -22°F to 266°F.

📦

Complete System

All-in-one kit includes the fan, filter, ducting, clamps, and all mounting hardware.

⚡

Efficient Power Usage

Operates at just 59W for cost-effective, continuous performance.

Specifications

Specification	Value
Model	Inline Fan R4 Combo
Size	4 Inch
Airflow	190 CFM
Fan Speed	2300 RPM
Noise Level	<31 dB
Power Usage	59 W
Material	Plastic
Carbon Filter Grade	1200+ RC 412
Ducting Length	8 feet
Controller	Variable Speed Controller

Compare VIVOSUN R-Series Kits

Feature	R4 Kit	R6 Kit	R8 Kit
Duct Size	4 Inch	6 Inch	8 Inch
Airflow	190 CFM	390 CFM	740 CFM
Fan Speed	2300 RPM	2450 RPM	2550 RPM
Noise Level	<31 dB	<32 dB	<35 dB
Power Usage	59 W	77 W	130 W

Support & Manuals

📄Vivosun Air Filtration Kit R4 Manual

Warranty

The VIVOSUN Air Filtration Kit R4 includes 1-year after-sale service coverage and offers a free return within 30 days of delivery for complete peace of mind.

FAQs

How does the variable speed controller work?+

The variable speed controller allows you to adjust the fan speed from 0-100% of its maximum 190 CFM capacity. Simply turn the dial to increase or decrease airflow based on your growing phase needs. Lower speeds are ideal for seedlings and young plants, while maximum speed provides optimal ventilation during flowering stages.

What size growing space is this system suitable for?+

This 4-inch, 190 CFM system is ideal for small to medium grow tents, including 2'x2' setups and up to 4'x4' tents. The system effectively handles spaces with ducting runs up to 8 feet while maintaining strong airflow performance, making it perfect for personal-scale growing operations.

How effective is the carbon filter at eliminating odors?+

The 1200+ RC 412 grade carbon filter uses Australian Virgin Charcoal for superior odor elimination. At 4" x 14", it provides a substantial surface area to effectively remove pungent smells and particulates from your growing environment. The high-quality charcoal ensures consistent performance throughout its lifespan.

What makes the ducting heavy-duty?+

The ducting features triple-layer construction with flexible steel wire supports that maintain shape and prevent collapse. A PET core is sandwiched between fire-retardant aluminum layers, providing durability and safety. This construction handles extreme temperatures from -22°F to 266°F while remaining flexible for easy installation.

How does this kit help manage grow room climate?+

This kit is crucial for managing your environment. By exhausting hot, humid air and pulling in fresh air, it helps you maintain the ideal conditions for plant growth. For a detailed guide, check our article on the perfect grow room temperature and humidity.

How quiet is the R4 fan during operation?+

The Inline Fan R4 operates at less than 31 dB, making it quieter than a whisper and virtually silent in most environments. Even at full 190 CFM capacity, the noise level remains minimal, ensuring a discreet operation.

Is this system compatible with other VIVOSUN equipment?+

Yes, the R4 Air Filtration Kit uses standard 4-inch connections that are compatible with other VIVOSUN equipment and grow tent systems. The kit eliminates compatibility concerns by providing all necessary components together, ensuring everything works perfectly out of the box.

Shipping & Returns

Order Processing & Shipping

We currently ship within the United States only. No international shipping is available at this time.

Order Processing:

Most orders are processed within 24-48 hours after being placed.

Some products may have extended processing times of 7-14 business days or more, which will be clearly indicated on the product page. If your order includes such items, you will receive an email from our team or be contacted directly to confirm the estimated shipping timeframe.

Shipping Times:

We partner with reliable national carriers to deliver your orders. While specific delivery times can vary, here's a general timeframe for each carrier:

USPS: Typically delivers between 9:00 AM and 5:00 PM, Monday through Saturday.
FedEx: Typically delivers between 8:00 AM and 8:00 PM, Monday through Friday, with some Saturday deliveries.
UPS: Typically delivers between 9:00 AM and 7:00 PM, Monday through Friday, with some Saturday deliveries.

Note:

These are estimated delivery hours and may vary depending on your location and specific delivery circumstances.
For the most accurate delivery information, please refer to the tracking details provided once your order has shipped.

Free Shipping

Free shipping on qualified items to the lower 48 states. Some that are not eligible are stated on their respective product information page. Learn more

Refunds & Returns

Cancellations are accepted within 24 hours of placing an order.
Returns are subject to each manufacturer's return policy. Please look into the return policy of the brand prior to ordering. Learn more

Vivosun Inline Fan R4 Air Filtration Kit - 4" Duct