---
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: "₨25511"
currency: LKR
in_stock: true
reviews_count: 13
category: "Vivosun"
url: https://www.desertcart.lk/products/30245394-vivosun-4-inch-inline-duct-fan-100-cfm-hvac-exhaust
store_origin: LK
region: Sri Lanka
---

# 100 CFM airflow <30 dB ultra-quiet Brushless motor, 2930 RPM 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:** ₨25511
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your airflow game—quiet, powerful, and built to last!

## 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?** ₨25511 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/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

- • **Powerful yet Compact:** Delivers a robust 100 CFM airflow in a sleek 4-inch design—perfect for tight spaces without sacrificing performance.
- • **Versatile Installation:** Ideal for basements, bathrooms, kitchens, attics, and grow rooms—boost your indoor air quality wherever you need it most.
- • **Durable Brushless Motor:** Equipped with a maintenance-free, permanently lubricated brushless motor for long-lasting, reliable ventilation.
- • **Whisper-Quiet Operation:** Operates below 30 decibels, ensuring your workspace or home stays peaceful and distraction-free.
- • **Energy Efficient & Easy Setup:** Consumes just 14 watts with a simple push-button switch and lightweight design for hassle-free installation.

## Overview

The VIVOSUN 4 Inch Inline Duct Fan offers a high-efficiency 100 CFM airflow powered by a durable brushless motor running at 2930 RPM. Designed for compact spaces, it operates quietly under 30 dB, making it perfect for enhancing ventilation in basements, bathrooms, kitchens, and attics. With energy-efficient 14-watt power consumption and easy installation, this silver-finished fan is a smart upgrade for any professional or home environment seeking reliable, whisper-quiet air circulation.

## Description

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

Review: Works as intended. - Works well. Tight fit on 6” pipe but does fit. Simple to use. Good price.
Review: Highly recommend. - Works perfectly, super quiet.

## 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 | #30,396 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #57 in Household Ventilation Fans |
| Blade Length | 4 Inches |
| Brand | VIVOSUN |
| Cable Length | 5.5 Feet |
| Color | Silver |
| Control Method | App |
| Customer Reviews | 4.2 4.2 out of 5 stars (9,707) |
| Date First Available | February 26, 2016 |
| Efficiency | Highly Efficient |
| Electric fan design | Exhaust Fan |
| Finish Type | Painted |
| Included Components | Cord |
| Indoor/Outdoor Usage | Indoor |
| Installation Type | built-in |
| Is Cordless? | No |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.68 pounds |
| Item model number | 331101-4 |
| Manufacturer | VIVOSUN |
| Model Name | vivosun |
| Motor Type | Brushless |
| Noise Level | 30 Decibels |
| Number of Blades | 3 |
| Number of Power Levels | 1 |
| Power Source | Electric |
| Product Dimensions | 4"D x 7"W x 4"H |
| Recommended Uses For Product | Basements |
| Room Type | Bathroom |
| Size | 4"& No Speed Controller |
| Special Feature | Lightweight, Portable |
| Speed | 2930 RPM |
| Style | Modern |
| Switch Type | Push Button |
| UPC | 714119466250 |
| Voltage | 120 Volts |
| 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 **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

### ⭐⭐⭐⭐⭐ Works as intended.
*by S***L on February 27, 2026*

Works well. Tight fit on 6” pipe but does fit. Simple to use. Good price.

### ⭐⭐⭐⭐⭐ Highly recommend.
*by D***. on February 28, 2026*

Works perfectly, super quiet.

### ⭐⭐⭐⭐ Speed control is iffy!
*by M***A on January 20, 2026*

Installed over a register in a 2nd floor bedroom with poor airflow. I have it plugged into a temperature control switch. It's noisy but a little less than the last one without a speed control. The speed control is not real effective on this fan as I would like to slow it down a little more. With that said,I might return and try another one!

## Frequently Bought Together

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*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-20*