---
product_id: 30245394
title: "VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver"
brand: "vivosun"
price: "¥9560"
currency: JPY
in_stock: true
reviews_count: 8
category: "Vivosun"
url: https://www.desertcart.jp/products/30245394-vivosun-4-inch-inline-duct-fan-100-cfm-hvac-exhaust
store_origin: JP
region: Japan
---

# 100 CFM airflow power Ultra-quiet <30 dB noise 2930 RPM motor speed VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver

**Brand:** vivosun
**Price:** ¥9560
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your airflow game—quiet, compact, and unstoppable!

## Quick Answers

- **What is this?** VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver by vivosun
- **How much does it cost?** ¥9560 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/30245394-vivosun-4-inch-inline-duct-fan-100-cfm-hvac-exhaust)

## 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

- • **Compact Powerhouse:** 4-inch size packs a punch with 100 CFM airflow for tight spaces.
- • **Plug & Play Comfort:** Easy installation with lightweight design and 5.5 ft cord for flexible setup.
- • **Versatile Ventilation:** Perfect for basements, bathrooms, kitchens, attics, and even grow rooms.
- • **Whisper-Quiet Efficiency:** Operates below 30 dB, so your focus stays uninterrupted.
- • **Durable & Maintenance-Free:** Permanently lubricated motor bearings ensure long-lasting, hassle-free use.

## Overview

The VIVOSUN 4 Inch Inline Duct Fan delivers a robust 100 CFM airflow with a high-speed 2930 RPM motor, all while maintaining whisper-quiet operation under 30 dB. Its compact 4-inch design fits seamlessly into tight HVAC spaces, making it ideal for basements, bathrooms, kitchens, attics, and grow rooms. Built with a permanently lubricated bearing, this durable fan requires zero maintenance and ensures long-term reliability. Easy to install and energy-efficient at just 14 watts, it’s the smart ventilation upgrade for professionals seeking comfort and performance.

## Description

VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver - desertcart.com

Review: Essential Addition for Better Airflow in Keystone RVs - The VIVOSUN 4 Inch Inline Duct Fan with 100 CFM is an absolute must-have if you own a Keystone RV, especially models like the Avalanche 390DS. The lack of proper airflow in the HVAC system of these RVs, particularly in the rear bedroom, can make it unbearably hot. Keystone's quality control issues only add to the frustration. Installing this ventilation fan was straightforward, and the difference in airflow is night and day. The rear bedroom now receives proper air circulation, making it comfortable even on hot days. The fan operates quietly, which is a bonus, ensuring that it doesn't disturb your peace. For anyone dealing with similar HVAC issues in their Keystone RV, I highly recommend the VIVOSUN Inline Duct Fan. It's a reliable solution to prevent overheating and improve overall comfort. 🌬️🚐❄️
Review: Running for over a year non-stop - Works great. I’ve bought several of these. One failed after several months of 24/7 use, but the others have been running 24/7 for over a year with no issues.

## Features

- Durable: The fan has a strong motor which features a permanently lubricated bearing that operates quietly and requires no maintenance
- Compact But Efficient: This duct fan is compact and lightweight enough to be installed in areas with little available space; With a diameter of 4 inches, speed of 2930 RPM and 100 CFM air flow
- Low Noise: Superior balanced centrifugal impeller for long service life & quiet operation; A less than 30 dB noise level does not have any harm and will not disturb your work
- Wide Applications: You can have it in bathrooms, kitchens, workshops, basements, attics and etc, in order to boost airflow in HVAC systems; Also, it can be used in grow rooms as intake fans or exhaust fan
- Specifications: Voltage 110/120V, Power 14W; Max Operating Temp of Motor is 130℃ / 266℉; Max Ambient Temp is 60℃ / 140℉; Note: Please turn the fan off immediately if the blades get stuck by other objects
- To maintain optimal performance of the exhaust fan, clean the fan after the first week of use with the carbon filter connected, and then clean regularly based on usage conditions

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01C82SYZ0 |
| Air Flow Capacity | 100 Cubic Feet Per Minute |
| Best Sellers Rank | #8,993 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #13 in Household Ventilation Fans |
| Blade Length | 4 Inches |
| Blade Material | Plastic |
| Brand | VIVOSUN |
| Brand Name | VIVOSUN |
| Cable Length | 5.5 Feet |
| Collection Name | Inline Duct Fans |
| Color | Silver |
| Control Method | App |
| Controller Type | Button Control |
| Customer Reviews | 4.2 out of 5 stars 6,969 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Painted |
| Included Components | Cord |
| Indoor Outdoor Usage | Indoor |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 4"D x 7"W x 4"H |
| Item Weight | 1.7 Pounds |
| Manufacturer | VIVOSUN |
| Material | Metal |
| Model Name | vivosun |
| Model Number | 331101-4 |
| Mounting Type | Duct Mount |
| Noise Level | 30 Decibels |
| Number of Blades | 3 |
| Number of Power Levels | 1 |
| Number of Speeds | 3 |
| Power Source | Electric |
| Product Dimensions | 4"D x 7"W x 4"H |
| Recommended Uses For Product | Basements |
| Room Type | Bathroom |
| Special Features | Lightweight, Portable |
| Speed | 2930 RPM |
| Standby Power Shutoff | Highly Efficient |
| Style | Modern |
| Switch Type | Push Button |
| UPC | 714119466250 |
| Unit Count | 1 Count |
| Voltage | 120 Volts |
| Warranty Description | Manufacturer Warranty for 360 days from date of purchase. |
| Wattage | 14 watts |

## Product Details

- **Brand:** VIVOSUN
- **Color:** Silver
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Duct Mount
- **Power Source:** Electric
- **Product Dimensions:** 4"D x 7"W x 4"H
- **Recommended Uses For Product:** Basements
- **Room Type:** Bathroom
- **Special Feature:** Lightweight, Portable
- **Style:** Modern

## Images

![VIVOSUN 4 Inch Inline Duct Fan 100 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver - Image 1](https://m.media-amazon.com/images/I/71TW4VUEXiL.jpg)

## Available Options

This product comes in different **Material Type, Size** options.

## Questions & Answers

**Q: Can you hook up a speed control to this booster?**
A: No you do not want to use a speed controller. You will burn this motor out in days. You want to use speed controllers on centrifugal fans, not booster fans. The motor is ment for the rated voltage, nothing more nothing less. Please don't listen to the comments saying speed controllers are compatible with this booster fan.

**Q: Would this fan properly vent a 1000w hps lamp?**
A: I am cooling two 600 W HPS lamps with a single fan and it works well

**Q: Will it overheat with a flow blockage?**
A: Very small motor like a bathroom exhaust fan. Will not overheat because not an air tight situation.

**Q: I could definitely hook this up on a timer, but is it okay if the fan happens to run when the AC is not? (Context, booster for one of my bedrooms)**
A: If the AC fan is not running,  the duct fan will *tend* to draw air from registers in other rooms rather than through the idle ac unit.  So, it will still work to equalize temperatures between rooms,  which is likely your goal.   On the negative side,  it will be drawing from the ceilings,  the hottest part of the rooms.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Essential Addition for Better Airflow in Keystone RVs
*by A***. on December 20, 2024*

The VIVOSUN 4 Inch Inline Duct Fan with 100 CFM is an absolute must-have if you own a Keystone RV, especially models like the Avalanche 390DS. The lack of proper airflow in the HVAC system of these RVs, particularly in the rear bedroom, can make it unbearably hot. Keystone's quality control issues only add to the frustration. Installing this ventilation fan was straightforward, and the difference in airflow is night and day. The rear bedroom now receives proper air circulation, making it comfortable even on hot days. The fan operates quietly, which is a bonus, ensuring that it doesn't disturb your peace. For anyone dealing with similar HVAC issues in their Keystone RV, I highly recommend the VIVOSUN Inline Duct Fan. It's a reliable solution to prevent overheating and improve overall comfort. 🌬️🚐❄️

### ⭐⭐⭐⭐⭐ Running for over a year non-stop
*by C***T on February 16, 2026*

Works great. I’ve bought several of these. One failed after several months of 24/7 use, but the others have been running 24/7 for over a year with no issues.

### ⭐⭐⭐⭐ Volume restricted due to size.
*by R***Z on May 3, 2025*

Fan works but I undersized the ventilation needs. Should have gone with 6 inch.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-28*