---
product_id: 32609977
title: "VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black"
brand: "vivosun"
price: "KSh27291"
currency: KES
in_stock: false
reviews_count: 10
url: https://www.desertcart.co.ke/products/32609977-vivosun-z4-4-inch-inline-duct-fan-203-cfm-ventilation
store_origin: KE
region: Kenya
---

# 203 CFM airflow 49 dB ultra-quiet stepless speed control VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black

**Brand:** vivosun
**Price:** KSh27291
**Availability:** ❌ Out of Stock

## Summary

> 💨 Elevate your air game—quiet, powerful, and fully in your control!

## Quick Answers

- **What is this?** VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black by vivosun
- **How much does it cost?** KSh27291 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.co.ke](https://www.desertcart.co.ke/products/32609977-vivosun-z4-4-inch-inline-duct-fan-203-cfm-ventilation)

## 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

- • **Whisper-Quiet Operation:** Keep your space serene with noise levels as low as 49 dB—no distractions, just fresh air.
- • **Powerful 203 CFM Airflow:** Maximize your indoor garden’s breathability with industry-leading ventilation.
- • **Customizable Speed Control:** Tailor airflow precisely with a stepless controller for perfect environmental balance.
- • **Versatile Indoor Climate Solution:** Ideal for grow tents, home gardens, and air purification setups—join the elite growers’ club.
- • **Effortless Installation & Maintenance:** Quick-mount bracket and rope hangers make setup and upkeep a breeze.

## Overview

The VIVOSUN Z4 4 Inch Inline Duct Fan delivers a robust 203 CFM airflow at 2500 RPM with whisper-quiet operation at just 49 dB. Featuring a stepless speed controller, it offers precise ventilation control ideal for grow tents and indoor gardens. Its durable, vibration-reducing design ensures long-lasting, reliable performance, while easy installation with mounting brackets and rope hangers makes it a top choice for professional and hobbyist growers alike.

## Description

desertcart.com : VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black : Tools & Home Improvement

Review: Having tried many, I believe this is the best value currently going in a 6" duct fan. - Very quiet and reliable! The speed control is icing on the cake because even more-expensive fans seldom have that option. This fan was actually cheaper than a similar Chinese-made blower that I bought months ago, but this one is MUCH better made. This one it is replacing was too loud, and after just a week started rattling and making out-of-balance noises that only improved slightly when I tightened things up. Not the Vivosun fan! This thing has now been in service just as long as the old one, and it still sounds and moves air like it was brand new. I very much feel comfortable comparing its performance to that of a Hurricane fan (one of which I also own). These things are perfect for building stand-alone air filter/charcoal filter boxes. My whole family has allergies, and teamed with the right filters this thing is keeping my family sniffle-free without all the noise of a HEPA filter.
Review: Strong and quiet-- and GREAT customer service - We had a 2nd floor room in our century-old house that had only a faint breeze coming from its vent via 6" flexible duct tube that was routed down through an old chimney to the basement where there was only a short distance between the main duct from the furnace/HVAC and the hole in the chimney. Consequently, longer inline fans were not an option. After installing the Vivosun 6" fan, that previously hot-in-the-summer and cold-in-the-winter room now has the best airflow in the house-- even airflow overkill for just one room. The variable speed controller on the fan allows you to adjust from super fast all the way down to very fast. Yeah, it won't blow slowly. This fan is no wimp! The fan is well balanced and lubricated and runs very quietly. About the only noise is from the wind that the fan creates, which is to be expected and is unavoidable. The motor itself is just about silent. UPDATE: January 15, 2020. After using it for a year and a half, it started to squeak and then make a rubbing sound. I contacted Vivosun and asked if there were any lubricants that they recommended or would advise against. They refunded my purchase price (!) and said that purchasing a new one from desertcart would be faster than servicing it. This is well past any warranty time and WAY ABOVE AND BEYOND any expected customer service! Excellent service!

## Features

- Energy-Efficient Ventilation: This blower with a fan speed of 2500 RPM creates an air flow of 203 CFM; It combines the features of both axial and centrifugal fans to achieve optimal ventilation
- Quiet Operation: The sturdy leather can reduce sound or vibration; Tight and precise construction eliminates rattling; The centrifugal impeller provides powerful airflow and has a low noise of 49 dB
- Adjustable Speed: This centrifugal fan is equipped with a stepless speed controller to enable the fan to run at different speeds; You can adjust it to the desired airflow level
- Easy to Install: This duct fan comes with a mounting bracket that the fan can be lifted by rope hangers; Quick installation and easy maintenance by simply removing the locking duct ends
- Versatile Applications: Ideal for air cleaning and temperature control in industrial, home and garden planting ventilation applications

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01CTM0H6I |
| Air Flow Capacity | 203 Cubic Feet Per Minute |
| Best Sellers Rank | #383,652 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,082 in Household Ventilation Fans |
| Blade Length | 4 Inches |
| Brand | VIVOSUN |
| Color | Black |
| Control Method | App |
| Customer Reviews | 4.4 4.4 out of 5 stars (5,830) |
| Efficiency | High Efficiency |
| Electric fan design | Blower |
| Finish Type | Painted |
| Included Components | Cord |
| Indoor/Outdoor Usage | Indoor |
| Is Cordless? | No |
| Is Discontinued By Manufacturer | No |
| Item Weight | 8.1 pounds |
| Item model number | Z4 |
| Main Power Connector Type | NEMA 5-15 |
| Manufacturer | VIVOSUN |
| Model Name | Inline Fan Z4 |
| Noise Level | 49 Decibels |
| Number of Blades | 1 |
| Number of Power Levels | 3 |
| Power Source | Corded Electric |
| Product Dimensions | 9.3"D x 9.7"W x 4"H |
| Recommended Uses For Product | Lighting |
| Room Type | Kitchen |
| Size | Z4 4 Inch |
| Special Feature | Lightweight |
| Speed | 2500 RPM |
| Style | 4'' with Speed Controller |
| UPC | 714119466366 |
| Voltage | 5 Volts |
| Wattage | 68 watts |

## Product Details

- **Brand:** VIVOSUN
- **Color:** Black
- **Electric fan design:** Blower
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 9.3"D x 9.7"W x 4"H
- **Recommended Uses For Product:** Lighting
- **Room Type:** Kitchen
- **Special Feature:** Lightweight
- **Style:** 4'' with Speed Controller

## Images

![VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black - Image 1](https://m.media-amazon.com/images/I/71c4dpGtQ3L.jpg)
![VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black - Image 2](https://m.media-amazon.com/images/I/61iV6ASFbWL.jpg)
![VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black - Image 3](https://m.media-amazon.com/images/I/71u8Jjy3fDL.jpg)
![VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black - Image 4](https://m.media-amazon.com/images/I/61C27kWlbDL.jpg)
![VIVOSUN Z4 4 Inch Inline Duct Fan, 203 CFM Ventilation Fan with Variable Speed Controller for Grow Tent, Indoor Garden Ventilation, Black - Image 5](https://m.media-amazon.com/images/I/613I2LEQUWL.jpg)

## Available Options

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

## Questions & Answers

**Q: 50db seriously?**
A: Louder than I thought too.  Have a muffler and an enclosure made from 2" fiberglass ceiling tiles...back looking for something else.

**Q: How loud is this fan?**
A: Best value for the money...If you have ever lived anywhere that had A/C compressors outside of your window...it's as loud as that. Yes, what you here is more the whooshing from the air movement than the fan motor. Too help with that...I ran my exhaust tubing to the back of the tent...away from the door...helped a lot.. Also; there is no "hum" in this controller whatsoever. A problem I had with another brand. Hung motor using HD zip ties...stopping any potential vibration...This fan is also very strong...I have to run it as low as it goes...more than enough...kinda too much for the 2 X 4 X 6. As a kicker...Vivosun has been around for a long time and have always treated me right.BUY IT it you'll like it!....

**Q: Is it discret shipping?**
A: No discrete shipping. The box has Vivosun's name and inline fan all over the box. Amazon doesn't tell you that. They do on some things but this isn't one of them.

**Q: How many watts would this fan use running it at say half volume using the included controller?**
A: If the information for the electrical rating is correct as stated.  The fan at full speed draws 1.1 amps.  That would be 132 watts at full speed so one could conclude an approximate watt draw of 66 watts.  But electricity being what it is and the construction of the component parts I believe you could safely say 75-100 watts.  May I ask why you are concerned with the watts?

## Customer Reviews

### ⭐⭐⭐⭐⭐ Having tried many, I believe this is the best value currently going in a 6" duct fan.
*by L***R on March 19, 2017*

Very quiet and reliable! The speed control is icing on the cake because even more-expensive fans seldom have that option. This fan was actually cheaper than a similar Chinese-made blower that I bought months ago, but this one is MUCH better made. This one it is replacing was too loud, and after just a week started rattling and making out-of-balance noises that only improved slightly when I tightened things up. Not the Vivosun fan! This thing has now been in service just as long as the old one, and it still sounds and moves air like it was brand new. I very much feel comfortable comparing its performance to that of a Hurricane fan (one of which I also own). These things are perfect for building stand-alone air filter/charcoal filter boxes. My whole family has allergies, and teamed with the right filters this thing is keeping my family sniffle-free without all the noise of a HEPA filter.

### ⭐⭐⭐⭐⭐ Strong and quiet-- and GREAT customer service
*by R***K on December 1, 2018*

We had a 2nd floor room in our century-old house that had only a faint breeze coming from its vent via 6" flexible duct tube that was routed down through an old chimney to the basement where there was only a short distance between the main duct from the furnace/HVAC and the hole in the chimney. Consequently, longer inline fans were not an option. After installing the Vivosun 6" fan, that previously hot-in-the-summer and cold-in-the-winter room now has the best airflow in the house-- even airflow overkill for just one room. The variable speed controller on the fan allows you to adjust from super fast all the way down to very fast. Yeah, it won't blow slowly. This fan is no wimp! The fan is well balanced and lubricated and runs very quietly. About the only noise is from the wind that the fan creates, which is to be expected and is unavoidable. The motor itself is just about silent. UPDATE: January 15, 2020. After using it for a year and a half, it started to squeak and then make a rubbing sound. I contacted Vivosun and asked if there were any lubricants that they recommended or would advise against. They refunded my purchase price (!) and said that purchasing a new one from Amazon would be faster than servicing it. This is well past any warranty time and WAY ABOVE AND BEYOND any expected customer service! Excellent service!

### ⭐⭐⭐⭐ Four stars with an important caveat
*by D***H on October 16, 2020*

I received the fan and canister and was happy with the build quality and performance. Happy with my purchase. However seven months later the fan begin to make grinding and rattling sounds (still worked but very loud), it sounds like the bearings have gone bad. That said I reached out to the company with the issue and they were responsive and within a week (after some communication and sharing of videos of the issue) they offered a great resolution. Due to the size of the unit a return via mail didn't make sense for the vendor or myself. They suggested a refund on the cost of the fan portion of the kit, and did not require a return of the original unit. IMO I received good service and am happy with the resolution. So why four stars? Well I was happy with the unit prior to the presumed bearing issue, and I had a good customer service experience. So I'm giving VIVOSUN the benefit of the doubt since faulty products can happen.

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*Product available on Desertcart Kenya*
*Store origin: KE*
*Last updated: 2026-03-19*