---
product_id: 319562010
title: "4 Inch Inline Duct Fan with RJ12 Speed Controller, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Gardening"
brand: "spider farmer"
price: "S$163"
currency: SGD
in_stock: true
reviews_count: 13
category: "Spider Farmer"
url: https://www.desertcart.sg/products/319562010-4-inch-inline-duct-fan-with-rj12-speed-controller-205
store_origin: SG
region: Singapore
---

# Energy-smart 27W EC motor Ultra-quiet 26.8 dB operation 205 CFM airflow powerhouse 4 Inch Inline Duct Fan with RJ12 Speed Controller, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Gardening

**Brand:** spider farmer
**Price:** S$163
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your indoor garden with silent, smart airflow mastery!

## Quick Answers

- **What is this?** 4 Inch Inline Duct Fan with RJ12 Speed Controller, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Gardening by spider farmer
- **How much does it cost?** S$163 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/319562010-4-inch-inline-duct-fan-with-rj12-speed-controller-205)

## Best For

- spider farmer enthusiasts

## Why This Product

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

## Key Features

- • **Tailored Airflow:** Adjust fan speed precisely to optimize your grow tent or indoor environment
- • **Hassle-Free Setup:** Lightweight design with easy hanging installation—no special tools needed
- • **Smart Speed Control:** RJ12 interface + app integration for seamless remote adjustments
- • **Whisper-Quiet Efficiency:** Brushless EC motor delivers powerful airflow at a barely-there 26.8 dB
- • **Built to Brave the Elements:** Durable IP42-rated ABS housing resists dust & moisture for long-lasting performance

## Overview

The Spider Farmer 4 Inch Inline Duct Fan combines a powerful 205 CFM airflow with whisper-quiet 26.8 dB operation, powered by an energy-efficient 27W brushless EC motor. Featuring an RJ12 speed controller compatible with smart apps, it offers precise remote speed adjustments to optimize ventilation for grow tents, hydroponics, and indoor gardening. Built with durable, IP42-rated ABS housing, this fan ensures reliable performance in demanding environments, while its lightweight design allows quick, tool-free installation.

## Description

desertcart.com: Spider Farmer 4 Inch Inline Duct Fan with RJ12 Speed Controller, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Gardening : Patio, Lawn & Garden

Review: Spider Farmer Equipment is Best Bang for the Buck! - Excellent blower fan to handle 3x3 and 2x2 tents with ease. GGS controller and smart phone app utilization makes control a breeze. There are a lot of power level settings through the smart phone app, as well as timer cycles, humidity/temperature cycles, etc. Options galore! I’ve been running my first fan for several runs and performance is A+. Thanks, Spider Farmer!
Review: works perfectly - works great. does exactly what I needed it to do - cools a previously hot second floor room

## Features

- 𝐔𝐩𝐠𝐫𝐚𝐝𝐞 𝐑𝐉𝟏𝟐 𝐈𝐧𝐭𝐞𝐫𝐟𝐚𝐜𝐞: Compatible with GGS Controller and Power Strip. Enable intelligent remote control and automation via the Spider Farmer App
- 𝐐𝐮𝐢𝐞𝐭 𝐚𝐧𝐝 𝐏𝐨𝐰𝐞𝐫𝐟𝐮𝐥: EC motor ensures energy efficiency: 27 watts, 205 CFM airflow, 26.8 dB noise. Lightweight ABS blades increase airflow by 40%. ETL/FCC listed, safe to use
- 𝐁𝐮𝐢𝐥𝐭 𝐭𝐨 𝐋𝐚𝐬𝐭: Made of premium ABS plastic housing for superior durability, IP42 rated, making it highly resistant to dust and liquids, and performs well even in harsh environments
- 𝐀𝐝𝐣𝐮𝐬𝐭𝐚𝐛𝐥𝐞 𝐒𝐩𝐞𝐞𝐝: The fan speed controller allows you to set your Inline fan speed freely and it is essential for optimal growth of your plant
- 𝐄𝐚𝐬𝐲 𝐈𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧: This exhaust fan is designed for quick and easy installation, just hang it on a solid bracket without special tools

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08S7C2HH4 |
| Air Flow Capacity | 205 Cubic Feet Per Minute |
| Assembly required | Yes |
| Batteries required | No |
| Best Sellers Rank | #61,381 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #32 in Hydroponic Ventilation Equipment #41 in Greenhouse Ventilation Equipment |
| Blade Length | 4 Inches |
| Brand | Spider Farmer |
| Color | Black |
| Control Method | Touch |
| Customer Reviews | 4.5 4.5 out of 5 stars (543) |
| Efficiency | High Efficiency |
| Electric fan design | Exhaust Fan |
| Finish Type | Unfinished |
| Finish types | Unfinished |
| Included Components | Speed Controller, Carbon Filter, Ducting Combo |
| Indoor/Outdoor Usage | Indoor |
| Installation Type | Hanging |
| Is Cordless? | No |
| Item Weight | 4.39 pounds |
| Item model number | 100 mm/4 Inch mit Drehzahlregler |
| Manufacture Year | 2025 |
| Manufacturer | Spider Farmer |
| Motor Type | Brushless |
| Noise Level | 26.8 Decibels |
| Number of Power Levels | 3 |
| Power Source | Electric |
| Product Dimensions | 12.8"D x 9.05"W x 10.43"H |
| Recommended Uses For Product | Air Circulation, Cooling |
| Room Type | Bathroom, Bedroom, Grow Tent, Kitchen |
| Size | 4 Inch RJ12 Speed Controller |
| Special Feature | Lightweight |
| Speed | 3000 RPM |
| Style | Modern |
| Voltage | 240 Volts |
| Wattage | 27 watts |

## Product Details

- **Brand:** Spider Farmer
- **Color:** Black
- **Electric fan design:** Exhaust Fan
- **Mounting Type:** spider
- **Power Source:** Electric
- **Product Dimensions:** 12.8"D x 9.05"W x 10.43"H
- **Recommended Uses For Product:** Air Circulation, Cooling
- **Room Type:** Bathroom, Bedroom, Grow Tent, Kitchen
- **Special Feature:** Lightweight
- **Style:** Modern

## Images

![4 Inch Inline Duct Fan with RJ12 Speed Controller, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Gardening - Image 1](https://m.media-amazon.com/images/I/611VepglvkL.jpg)

## Questions & Answers

**Q: What are the upgrades in the new fan?**
A: Upgrade the RJ12 interface to improve the stability of the connection between the controller and the fan, avoiding the control interruption caused by the loosening of the traditional interface.

**Q: Can fans with a knob speed controllers be connected to the GGS Series?**
A: Yes. Fans with knob controller is compatible with GGS Controller and Power Strip. If you already have the GGS series, you can directly purchase this fan to use with it, without additional accessories, and easily realize the equipment linkage control.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Spider Farmer Equipment is Best Bang for the Buck!
*by B***T on December 24, 2025*

Excellent blower fan to handle 3x3 and 2x2 tents with ease. GGS controller and smart phone app utilization makes control a breeze. There are a lot of power level settings through the smart phone app, as well as timer cycles, humidity/temperature cycles, etc. Options galore! I’ve been running my first fan for several runs and performance is A+. Thanks, Spider Farmer!

### ⭐⭐⭐⭐⭐ works perfectly
*by J***3 on December 5, 2025*

works great. does exactly what I needed it to do - cools a previously hot second floor room

### ⭐⭐⭐⭐⭐ Powerful
*by M***A on October 20, 2021*

We have been using this fan to exhaust our grow tent and it is powerful… it arrived well packaged in a box with the sensor unit and monitoring screen in a separate box within the package. It came with instructions and recommended variations as to how one could set it up in a grow tent as there are several possibilities though with the easy setup one could get the job done. We wanted this particular fan because of the smart features and control it allowed us to have to boost our grow to the next level. We feel like this is a next level fan in general as it has had the power to exhaust even larger grow tents than other fans/tents we have used. Back to the fan lol… the reason why we are a fan of this fan is it has literally allowed us more time to work on the plants without having to worry as much about the environment as it has ten different speeds which automatically change to adjust the environment of our grow room, and to our specifications maintaining a healthy environment with on point humidity/temperature levels. We placed the sensor in with the ladies (plants) and tested it with our hygrometer, seeing it was on point and the way it was delicately packed with a thick clear plastic protective film over the sensor, was overall satisfied with that aspect and in general. We connected it to ducting and a carbon filter as it has the power to scrub the air clean through our exhaust system, and am pleased to say it is extremely quiet for a such a powerful fan… compared to other exhaust fans was worth it because we have had more time to do other things in the garden which require more attention as it allowed us to have a hands free monitoring system for not a bad price. It has pulled its weight in value as you can see ;)

## Frequently Bought Together

- Spider Farmer 4 Inch Inline Duct Fan with RJ12 Speed Controller, 205 CFM Quiet EC Motor, Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics, Indoor Gardening
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust
- Spider Farmer 4 Inch Air Carbon Filrer Smelliness Control with Premium Australia Virgin Charcoal for Inline Duct Fan, Grow Tent Odor Control, Hydroponics, Pre-Filter Included, Reversible Flange

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**Shop now:** [https://www.desertcart.sg/products/319562010-4-inch-inline-duct-fan-with-rj12-speed-controller-205](https://www.desertcart.sg/products/319562010-4-inch-inline-duct-fan-with-rj12-speed-controller-205)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-10*