---
product_id: 33838192
title: "R6 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller HVAC Blower for Ventilation"
brand: "vivosun"
price: "HK$1430"
currency: HKD
in_stock: true
reviews_count: 8
url: https://www.desertcart.hk/products/33838192-r6-6-inch-390-cfm-inline-duct-fan-with-variable
store_origin: HK
region: Hong Kong
---

# 390 CFM airflow power Ultra-quiet 34 dB noise Stepless variable speed control R6 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller HVAC Blower for Ventilation

**Brand:** vivosun
**Price:** HK$1430
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your air game with power, silence, and control.

## Quick Answers

- **What is this?** R6 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller HVAC Blower for Ventilation by vivosun
- **How much does it cost?** HK$1430 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/33838192-r6-6-inch-390-cfm-inline-duct-fan-with-variable)

## Best For

- vivosun enthusiasts

## Why This Product

- Trusted vivosun brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision Speed Control:** Stepless variable speed lets you dial in the perfect airflow for any environment.
- • **Whisper-Quiet Operation:** Runs below 34 dB, so productivity and peace coexist effortlessly.
- • **Powerful Airflow Mastery:** Delivers a robust 390 CFM to keep your space fresh and energized.
- • **Compact & Effortless Setup:** Lightweight design with included mounting bracket for seamless installation in tight spaces.
- • **Versatile Ventilation Solution:** Ideal for grow rooms, basements, bathrooms, and workshops—engineered for every indoor challenge.

## Overview

The VIVOSUN R6 6 Inch Inline Duct Fan combines a high-performance 390 CFM airflow with whisper-quiet operation at just 34 dB. Featuring a stepless variable speed controller, it offers precise airflow customization. Its compact, lightweight design and included mounting bracket make installation quick and easy. Perfect for indoor ventilation needs across grow rooms, basements, bathrooms, and workshops, this durable fan ensures efficient air circulation while maintaining a low noise profile.

## Description

desertcart.com : VIVOSUN R6 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller HVAC Blower for Ventilation : Tools & Home Improvement

Review: Sturdy and powerful fan, don't let the plastic assembly fool you. - So, I'm using this fan as part of my custom built ventilation system in my basement room converted to a cigar room. I use it to suck the cigar smoke out through the window via the 6 inch hose and some ducting that goes out. I use it in conjunction with a duct fan that's hooked onto the HVAC ducting that acts as an intake fan for the same room. What I like. 1. The speed controller comes attached. No need to purchase one separately. 2. Durable. I had a mishap where I accidentally dropped it from 7 feet to a concrete floor. No problems, turned it on and fired right up. It's plastic on the outside, but the fan itself has some good heft to it. 3. Powerful. This thing cleans out a room fast. You can watch the smoke going from the cigar a good distance away in the room as it goes right to the area of the fan. What I don't like: 1. This thing is loud. But, that's the compromise. If you want a proper fan that will do the job, noise will be on the table. That all said, it's not loud enough to drown out conversation or music on a small speaker in the room. Further, it's powerful enough to run on low and still keep the room clear with one or two cigar smokers. In all, this being part of my ventilation system saved me hundreds of dollars by not buying a rabbit, or any other overpriced smoke eater. Good price, quality fan.
Review: Quiet, Efficient, and Perfect for Any Ventilation Need - I’m thoroughly impressed with the VIVOSUN Variable Speed Inline Duct Fan! From the moment I set it up, it was clear that this fan is built for performance. The brushless motor and durable plastic blades make it not only efficient but also incredibly quiet—at 34 dB, it’s nearly silent while running. Whether you're using it in an industrial, household, or horticultural setting, it delivers optimal airflow, reaching up to 390 CFM. One feature I love is the stepless speed controller on the power cord. It gives me full control to adjust the airflow and noise level, so I can tailor it to my needs. The compact design (measuring only 8.7 x 11.8 x 8.7 inches) fits perfectly into tight spaces, and installation was a breeze thanks to the included bracket and removable duct ends. This fan is incredibly versatile and does the job exceptionally well. If you're looking for a reliable, efficient, and quiet ventilation solution, I highly recommend this product. It’s the perfect addition to any ventilation system!

## Features

- Energy-Efficient Ventilation: This powerful blower with a fan speed of 2450 RPM can create an air flow of 390 CFM; It combines the features and benefits of axial and centrifugal fan, effectively circulating air
- Low Noise Level: The durable fan blades revolve smoothly and powerfully, which helps collect airflow volume and cut noise output; A less than 34 dB noise level will not disturb your work
- Adjustable Speed: A stepless speed controller on the power cord enables the fan to run at different speeds; With this speed switch, you can adjust it to the desired airflow level
- Easy Installation: This duct fan is compact and lightweight so it can be installed in small areas; Comes with an installation bracket indicating the direction of the airflow; Removable duct ends with locking tabs
- Versatile Applications: Suitable for industrial, household and horticulture ventilation applications; It can quietly and efficiently moving large volumes of air throughout your ventilation system
- Suitable for indoors: VIVOSUN fan is the ideal solution for your indoor grow room (grow tent air circulation), bathroom moisture removal, basement mold prevention, and 3D printing workshop heat & dust management

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01DXYMJ94 |
| Air Flow Capacity | 390 Cubic Feet Per Minute |
| Best Sellers Rank | #15,929 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #9 in Greenhouse Ventilation Equipment |
| Blade Length | 8.7 Inches |
| Blade Material | Plastic |
| Brand | VIVOSUN |
| Brand Name | VIVOSUN |
| Collection Name | Inline Duct Fans |
| Color | Black |
| Control Method | App |
| Controller Type | Button Control |
| Customer Reviews | 4.5 out of 5 stars 14,186 Reviews |
| Electric Fan Design | Blower |
| Electric fan design | Blower |
| Finish Type | Unfinished |
| Included Components | Cord |
| Indoor Outdoor Usage | Indoor |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 8.7"D x 8.7"W x 11.8"H |
| Manufacturer | VIVOSUN |
| Material | Plastic |
| Model Name | 306201P-6 |
| Model Number | R8 |
| Mounting Type | Wall Mount |
| Noise Level | 34 Decibels |
| Number of Blades | 3 |
| Power Source | Electric |
| Product Dimensions | 8.7"D x 8.7"W x 11.8"H |
| Recommended Uses For Product | Home |
| Room Type | Bedroom |
| Special Features | Lightweight |
| Speed | 2450 RPM |
| Standby Power Shutoff | High Efficiency |
| Style | Basic |
| UPC | 714119464164 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts |
| Warranty Description | Manufacturer Warranty for 360 days from date of purchase. |
| Wattage | 67 watts |

## Product Details

- **Brand:** VIVOSUN
- **Color:** Black
- **Electric fan design:** Blower
- **Mounting Type:** Wall Mount
- **Power Source:** Electric
- **Product Dimensions:** 8.7"D x 8.7"W x 11.8"H
- **Recommended Uses For Product:** Home
- **Room Type:** Bedroom
- **Special Feature:** Lightweight
- **Style:** Basic

## Images

![R6 6 Inch 390 CFM Inline Duct Fan with Variable Speed Controller HVAC Blower for Ventilation - Image 1](https://m.media-amazon.com/images/I/61LTEMQSZuL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: Will this work with a speed controller?**
A: This fan alreadly has a stepless speed controller on the power cord enables the fan to run at different speeds.

**Q: Which size tent work with this fan?**
A: For 6 Inch fan,we recommend the 48"x 48"x 80"/60"x 60"x 80" tents.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Sturdy and powerful fan, don't let the plastic assembly fool you.
*by U***L on December 6, 2018*

So, I'm using this fan as part of my custom built ventilation system in my basement room converted to a cigar room. I use it to suck the cigar smoke out through the window via the 6 inch hose and some ducting that goes out. I use it in conjunction with a duct fan that's hooked onto the HVAC ducting that acts as an intake fan for the same room. What I like. 1. The speed controller comes attached. No need to purchase one separately. 2. Durable. I had a mishap where I accidentally dropped it from 7 feet to a concrete floor. No problems, turned it on and fired right up. It's plastic on the outside, but the fan itself has some good heft to it. 3. Powerful. This thing cleans out a room fast. You can watch the smoke going from the cigar a good distance away in the room as it goes right to the area of the fan. What I don't like: 1. This thing is loud. But, that's the compromise. If you want a proper fan that will do the job, noise will be on the table. That all said, it's not loud enough to drown out conversation or music on a small speaker in the room. Further, it's powerful enough to run on low and still keep the room clear with one or two cigar smokers. In all, this being part of my ventilation system saved me hundreds of dollars by not buying a rabbit, or any other overpriced smoke eater. Good price, quality fan.

### ⭐⭐⭐⭐⭐ Quiet, Efficient, and Perfect for Any Ventilation Need
*by F***A on February 11, 2025*

I’m thoroughly impressed with the VIVOSUN Variable Speed Inline Duct Fan! From the moment I set it up, it was clear that this fan is built for performance. The brushless motor and durable plastic blades make it not only efficient but also incredibly quiet—at 34 dB, it’s nearly silent while running. Whether you're using it in an industrial, household, or horticultural setting, it delivers optimal airflow, reaching up to 390 CFM. One feature I love is the stepless speed controller on the power cord. It gives me full control to adjust the airflow and noise level, so I can tailor it to my needs. The compact design (measuring only 8.7 x 11.8 x 8.7 inches) fits perfectly into tight spaces, and installation was a breeze thanks to the included bracket and removable duct ends. This fan is incredibly versatile and does the job exceptionally well. If you're looking for a reliable, efficient, and quiet ventilation solution, I highly recommend this product. It’s the perfect addition to any ventilation system!

### ⭐⭐⭐⭐ Noisy / Not Properly Balanced Impeller/ 4yr Life? New models wt better motor?
*by L***E on June 8, 2025*

I just recently (06/25) replaced the fan unit from this kit that I purchased here on Amazon July 26, 2021. The complete kit was on sale for what is normally the price for just the fan - $59.49. From the beginning, the blower unit showed enough vibration that I couldn't use the included wall mount and had to resort to laying it on a cushioning bag of fiberfill on the top of the grow tent as a vibration damper. I needed the clearance inside the enclosure, so although hanging it may (or may not have) transmitted the vibration from the unit through the frame as badly as it did through the wall bracket, it wasn't an option. Laying on the fiberfill, the noise was reduced to a tolerable level, and the unit ran 24/7 at full RPM for just-a-month-shy of a full 4 years. Running the blower with the intake hose removed the imbalance of the impeller and the amount of deflection from centered was clearly visible. Still, there was enough clearance between the red impeller and the venturi that this did not interfere with the function of the unit. At 195 CFM, it has good suction and air could be felt processing through the filter on the exhaust end. However, starting at the beginning of 2025 the fan suffered from reduced RPM / CFM and sounded strained. I regularly clear the intake impeller of any airborne particulates that might accumulate on the impeller blade edges, so I removed the intake venturi and the white center screw to unmount the blade. The blade itself was free of accumulate. The shaft of the motor, on the other hand, was difficult to turn. The motor in question in my July 2021 model does not look like the current depictions that suggest a multi-field induction or EC motor. I recognize the motor as a variant of the type of small wire wound motor that had been used for decades in household refrigerators to circulate the air in and from the freezer. These motors are ideal in a sub-freezing environment as the motors and bearings are literally cooled by the freezer environment. As such they could run for 10-20 years before the bearings run dry or wear - and even then, I have 'resurrected' many that were seized or binding by re-oiling with lightweight synthetic oil at the bearing endcaps. In the case of the VivoSun motor, it was run in non-refrigerated environment. The bearings were thirsty and did bring back the RPMs upon replenishment, but the imbalanced impeller had also worn the actual sleeved bearing and shaft surfaces so that the amount of deflection, now caused the freely spinning fan to strike the inside of the plenum -resulting in chattering at full speed and dramatic vibration at reduced speeds. I have seen a number of others complain about this fan (even as separate from this complete kit). Unless the manufacturer has corrected the balance issue with the red intake impeller, and replaced the refrigerator evaporator style motor with something more substantial, noise / vibration will be an issue along with potential early replacement. I chose to try a 4" Vevor EC motor fan unit for about the same pricepoint and so far it is immediately quieter with no significant vibration. It also uses less than half (23w) of the power of this one (59w). Since I also have extensive experience with major household appliances using EC motors, I know that the motor control circuitry is a weak point so it will remain to be seen if it will outlast the nearly 4 years life of this unit - but it's already worth it in how quietly it moves its 205CFM vs 195 from this noisier unit.

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-03-02*