---
product_id: 211860179
title: "AirSupply ES4, 4 Inch Inline Duct Fan with Solid Metal Case, 195 CFM Quiet Vent Fan with Variable Speed Controlled for Grow Tent and Ventilation"
brand: "turbro"
price: "HK$925"
currency: HKD
in_stock: true
reviews_count: 9
category: "Turbro"
url: https://www.desertcart.hk/products/211860179-airsupply-es4-4-inch-inline-duct-fan-with-solid-metal
store_origin: HK
region: Hong Kong
---

# 18W ultra-efficient power 195 CFM airflow 37 dB whisper-quiet noise AirSupply ES4, 4 Inch Inline Duct Fan with Solid Metal Case, 195 CFM Quiet Vent Fan with Variable Speed Controlled for Grow Tent and Ventilation

**Brand:** turbro
**Price:** HK$925
**Availability:** ✅ In Stock

## Summary

> 💨 Elevate your air game with silent power and sleek efficiency!

## Quick Answers

- **What is this?** AirSupply ES4, 4 Inch Inline Duct Fan with Solid Metal Case, 195 CFM Quiet Vent Fan with Variable Speed Controlled for Grow Tent and Ventilation by turbro
- **How much does it cost?** HK$925 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/211860179-airsupply-es4-4-inch-inline-duct-fan-with-solid-metal)

## Best For

- turbro enthusiasts

## Why This Product

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

## Key Features

- • **Whisper-Quiet Precision:** Variable speed control from 0-100% lets you dial in airflow silently, perfect for focused work or relaxation zones.
- • **Powerful Yet Energy-Savvy:** Delivers a robust 195 CFM airflow while consuming just 18 watts—maximize ventilation without the energy guilt.
- • **Built to Brave Any Environment:** Solid airtight steel casing with IP44 waterproof rating ensures durability in grow tents, workshops, or humid spaces.
- • **Effortless Installation & Maintenance:** Comes ready to mount with included hardware and features permanently-lubricated bearings for long-lasting performance.
- • **Versatile Ventilation for Modern Spaces:** Ideal for grow tents, server rooms, bathrooms, or industrial setups—stay ahead with adaptable airflow solutions.

## Overview

The TURBRO AirSupply ES4 is a compact 4-inch inline duct fan engineered for high-performance ventilation, delivering 195 CFM airflow at 5000 RPM while consuming only 18 watts. Featuring a brushless DC motor for 3x longer life and 60% less power use than traditional AC motors, it operates whisper-quietly at just 37 dB with a variable speed controller for precise airflow management. Its rugged airtight steel case with IP44 waterproof protection ensures reliable operation in demanding environments like grow tents, server rooms, and industrial spaces. Easy to install and maintain, the ES4 is the go-to solution for professionals seeking efficient, durable, and quiet ventilation.

## Description

Features: √ Energy Efficient - Consumes up to 60% less power √ Compact Design - Yet Powerful Ventilation with 195 CFM air flow at 5,000 RPM √ Brushless DC Motor - Quiet Operation, Lasts 3x longer than AC motors √ Variable Speed Controller - 0 to 100% speed control in 1% increments √ Multiple Mounting Options - Hardware kit included for wall mounting

Review: Works well, does what it's supposed to. - I bought my unit for ventilating a basement. After about 2 months of continuous use, it stopped working for seemingly no reason. It was past desertcart's return period, so I contacted Turbro's support. They sent me a new unit the very next day! I'm back up and running no problem. this thing can move a TON of air. And while it's not super quiet at the max speed, it's very reasonable. I keep it at a relatively slow speed, so it's pretty dang quiet for me. As long as this replacement unit holds up, I'll keep this as a 5 star review. If the new one dies like the old one did, I will likely update it.
Review: Quality fan - Fantastic fan. Moves a lot of air. The speed adjustment works smoothly. I've had one running continuously for over two years and it's still going strong. Nice and quiet too.

## Features

- 【Outstanding Ventilation】The AirSupply ES4 delivers an airflow of 195 CFM at 5000 RPM with only 18 watts of power. Our brushless DC motor (EC motor) performs 30% more efficiently with 60% less power consumption than AC motors.
- 【Sturdy Construction】 Engineered with an airtight steel case and IP44 waterproof protection in a compact design, the ES4 will stay running in harsh environments, big or small.
- 【Quiet Operation】Whisper-quiet operation is possible thanks to the variable speed controller. Adjust from 0-100% fan speed to without any increase in humming or buzzing sounds.
- 【Easy to Use】The duct fan and controller can be mounted with no additional assembly. The permanently-lubricated bearing reduces wear and tear to cut down on maintenance.
- 【Multiple Applications】 Designed for increased air circulation and moisture/odor removal in grow tents, greenhouses, bathrooms, server rooms, A/V equipment, or industrial workshops.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0894RP1Y2 |
| Air Flow Capacity | 195 Cubic Feet Per Minute |
| Best Sellers Rank | #486,717 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #105 in Hydroponic Ventilation Equipment |
| Blade Length | 4 Inches |
| Blade Material | Plastic |
| Brand | TURBRO |
| Brand Name | TURBRO |
| Collection Name | Inline Duct Fans |
| Color | Blue |
| Control Method | App |
| Controller Type | Button Control |
| Customer Reviews | 4.6 out of 5 stars 178 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Powder Coated |
| Global Trade Identification Number | 00816621022709 |
| Included Components | 1× 4'' Duct Fan (with a 6 ft. |
| Indoor Outdoor Usage | Indoor |
| Installation Type | wall-mounted |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 6.26"D x 7.24"W x 5.91"H |
| Item Type Name | 195 CFM Energy Efficient Exhaust Fan with Variable Speed Controlled EC Motor for Grow Tents, Hydroponics, Industrial and Residential Ventilation |
| Item Weight | 2.7 Pounds |
| Main Power Connector Type | Standard North American 3-prong plug (Type B) or Standard North American 2-prong plug (Type A) |
| Manufacturer | TURBRO |
| Material | Aluminum |
| Model Name | AirSupply ES4 4 Inch Inline Duct Fan |
| Model Number | ES4 |
| Motor Type | brushless DC motor |
| Mounting Type | Wall Mount |
| Noise Level | 37 Decibels |
| Number of Blades | 7 |
| Number of Power Levels | 101 |
| Number of Speeds | 101 |
| Part Number | ES4 |
| Power Source | Corded Electric |
| Product Dimensions | 6.26"D x 7.24"W x 5.91"H |
| Recommended Uses For Product | Air Circulation |
| Room Type | Bedroom |
| Size | 4 Inch (195 CFM, 18 W) |
| Special Features | Adjustable Speed Control |
| Speed | 5000 RPM |
| Standby Power Shutoff | High Efficiency |
| Style | Industrial |
| UPC | 816621022709 |
| Unit Count | 1.0 Count |
| Voltage | 120 Volts |
| Warranty Description | We provide a 2-year warranty from the purchase date. |
| Wattage | 18 watts |

## Product Details

- **Brand:** TURBRO
- **Color:** Blue
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Product Dimensions:** 6.26"D x 7.24"W x 5.91"H
- **Recommended Uses For Product:** Air Circulation
- **Room Type:** Bedroom
- **Special Feature:** Adjustable Speed Control
- **Style:** Industrial

## Images

![AirSupply ES4, 4 Inch Inline Duct Fan with Solid Metal Case, 195 CFM Quiet Vent Fan with Variable Speed Controlled for Grow Tent and Ventilation - Image 1](https://m.media-amazon.com/images/I/61PF3oK6dEL.jpg)

## Available Options

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

## Questions & Answers

**Q: How far can the air be pushed  from one room to another**
A: It’s 195 CFM. depends on the duct work.   Go bigger and get the speed control. It’s a good quality fan.

**Q: How far for the fan unit can the speed control be mounted?**
A: Hi thank you for your inquiry. This speed control comes with a 16 ft cable, and it could be mounted away from the fan not more than 16 ft.  
Should you have any further question, please kindly contact us by support@turbro.com.

**Q: Can this dc power motor be adapted to be driven from a dc power source?**
A: This unit operates at 110vac input.  What DC voltage did you have in mind. I think that this motor operates at a higher voltage that would not make DC practical.

**Q: Is the fan reversible?**
A: No. The unit is single direction.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works well, does what it's supposed to.
*by I***I on June 16, 2022*

I bought my unit for ventilating a basement. After about 2 months of continuous use, it stopped working for seemingly no reason. It was past amazon's return period, so I contacted Turbro's support. They sent me a new unit the very next day! I'm back up and running no problem. this thing can move a TON of air. And while it's not super quiet at the max speed, it's very reasonable. I keep it at a relatively slow speed, so it's pretty dang quiet for me. As long as this replacement unit holds up, I'll keep this as a 5 star review. If the new one dies like the old one did, I will likely update it.

### ⭐⭐⭐⭐⭐ Quality fan
*by T***C on May 11, 2026*

Fantastic fan. Moves a lot of air. The speed adjustment works smoothly. I've had one running continuously for over two years and it's still going strong. Nice and quiet too.

### ⭐⭐⭐⭐⭐ Works good.
*by T***N on December 3, 2025*

Works good. Good craftmanship.

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*Product available on Desertcart Hong Kong*
*Store origin: HK*
*Last updated: 2026-07-29*