---
product_id: 480945861
title: "MARS HYDRO 4\"Inline Fan Carbon Filter Combo- 4\"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room"
brand: "mars hydro"
price: "€ 622.80"
currency: EUR
in_stock: true
reviews_count: 5
category: "Mars Hydro"
url: https://www.desertcart.at/products/480945861-mars-hydro-4inline-fan-carbon-filter-combo-4inline-fan-speed
store_origin: AT
region: Austria
---

# 205 CFM airflow Ultra-quiet <37 dB noise 3-speed variable control MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room

**Brand:** mars hydro
**Price:** € 622.80
**Availability:** ✅ In Stock

## Summary

> 🌿 Breathe Easy, Grow Better — The Ultimate Quiet Powerhouse for Your Grow Space

## Quick Answers

- **What is this?** MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room by mars hydro
- **How much does it cost?** € 622.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/480945861-mars-hydro-4inline-fan-carbon-filter-combo-4inline-fan-speed)

## Best For

- mars hydro enthusiasts

## Why This Product

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

## Key Features

- • **Whisper-Quiet Operation:** Enjoy powerful airflow at a barely-there 28-37 dB noise level—work or relax without distraction.
- • **Complete Ventilation Kit:** Includes 33ft ducting and 3 clamps for fast, hassle-free setup in 4x4 to 5x5 grow tents.
- • **Advanced Odor Elimination:** Activated Australian virgin charcoal filter traps 100% of unwanted odors and particulates.
- • **Precision Airflow Control:** Tailor your grow room environment with 3-speed variable fan control for optimal ventilation.
- • **Energy-Efficient & Durable:** 40W motor with robust plastic housing ensures long-lasting, low-power performance.

## Overview

The MARS HYDRO 4" Inline Fan Carbon Filter Combo delivers 205 CFM of adjustable airflow with whisper-quiet operation under 37 dB. Featuring a premium Australian virgin activated charcoal filter, it eliminates odors and particulates effectively. This all-in-one ventilation kit includes a speed controller, 33 feet of ducting, and clamps, designed for seamless installation in 4x4 to 5x5 grow tents, hydroponics, and grow rooms. Its energy-efficient 40W motor and durable construction make it a reliable, professional-grade solution for optimized indoor plant environments.

## Description

MARS HYDRO 4 Inch Inline Duct Fan 4” Ventilation Exhaust Fan with Speed Controller for Grow Tents, Heating Cooling Booster, Hydroponics

Review: So far so good - When I first set up the fan and turned it on, there was a clicking noise. It sounded like the fan was hitting the housing. I turned it off, and then back on. I turned the fan speed up as high as it would go, and the clicking stopped. The clicking has not returned at any speed setting. The fan has been running non-stop for about 2 weeks. I should add that Mars Hydro contacted me a couple of days after my purchase to inform me that there might be issues with the fan, and if there were to let them know and they will take would take care of it. They also offered me a free 5gl grow bag.
Review: Quality product - Been running quietly for over a year. Quality product.

## Features

- Package Include: 4"inline duct fan with speed controller, 4"carbon filter, 33ft length flex ducting,3 Duct Clamps
- 4 Inch Inline Duct Fan with Variable speed controller for easy fan speed adjustment.Durable plastic fan housing and blades for extremely low noise(<37 dB).Powerful Motor is more energy efficiency and quieter operation.
- Superior carbon Made of imported Virgin Australian activated charcoal, delivering 100% filtered airflow, eliminate some of the most undesirable odors, pungent smell and particulates from indoor grow tent, hydroponics grow room.
- Effective & Quiet Ventlation Kit: Excellent odor control,4" Inline duct Fan is rated for max 200CFM. With 3 settings of fan speed controller, noise min to 37dB. Filter with built-in Australian virgin charcoal granules which enables to absorb exponentially more contaminants and allergens than traditional carbon.
- Perfect Growth Partner: Fast assembly,work as a cost-effective,convenient ventilation combo.Satisfaction Guarantee: any problems will be responded in 24 hours.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B08RZ3D69D |
| Air Flow Capacity | 205 Cubic Feet Per Minute |
| Brand | MARS HYDRO |
| Brand Name | MARS HYDRO |
| Color | Black |
| Colour | Black |
| Control Method | Push Button |
| Customer Reviews | 4.5 out of 5 stars 348 Reviews |
| Electric Fan Design | Exhaust Fan |
| Electric fan design | Exhaust Fan |
| Finish Type | Unfinished |
| Included Components | Straps |
| Indoor Outdoor Usage | Indoor |
| Is Product Cordless | No |
| Item Dimensions D x W x H | 30.2D x 19.4W x 19.1H centimeters |
| Item Weight | 6.38 Kilograms |
| Manufacturer | MARS HYDRO |
| Material | Activated Carbon |
| Model Name | 4 inch inline fan kit |
| Model Number | 4 inch inline fan kit |
| Mounting Type | Duct Mount |
| Noise Level | 28 Decibels |
| Number of Power Levels | 3 |
| Part Number | 4 inch inline fan kit |
| Power Source | Power supply (DC) |
| Power source | Power supply (DC) |
| Product dimensions | 30.2D x 19.4W x 19.1H centimeters |
| Recommended Uses For Product | Ventilating |
| Size | 4" Combo with Speed controller |
| Smart Home Compatibility | Not Smart Home Compatible |
| Special Features | Variable speed control and carbon filter |
| Speed | 3000 RPM |
| Standby Power Shutoff | Highly efficient |
| Style | 4 Inch with Speed Controller |
| Unit Count | 1 Count |
| Voltage | 12 Volts |
| Wattage | 40 watts |

## Product Details

- **Brand:** MARS HYDRO
- **Colour:** Black
- **Electric fan design:** Exhaust Fan
- **Material:** Activated Carbon
- **Mounting type:** Duct Mount
- **Noise level:** 28 Decibels
- **Product dimensions:** 30.2D x 19.4W x 19.1H centimeters
- **Special features:** Variable speed control and carbon filter
- **Style:** 4 Inch with Speed Controller
- **Wattage:** 40 watts

## Images

![MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room - Image 1](https://m.media-amazon.com/images/I/71I5FX4e8JL.jpg)
![MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room - Image 2](https://m.media-amazon.com/images/I/7130KG6ejSL.jpg)
![MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room - Image 3](https://m.media-amazon.com/images/I/61L41YD9s4L.jpg)
![MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room - Image 4](https://m.media-amazon.com/images/I/71uB4YDhmwL.jpg)
![MARS HYDRO 4"Inline Fan Carbon Filter Combo- 4"Inline Fan with Speed Controller,4 Inch Carbon Filter, 33 Feet Ducting and 3 Duct Clamps Ventilation System for 4x4 5x5 Grow Tent, Hydroponics, Grow Room - Image 5](https://m.media-amazon.com/images/I/71w1ZbjSLbL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ So far so good
*by A***Y on 9 June 2021*

When I first set up the fan and turned it on, there was a clicking noise. It sounded like the fan was hitting the housing. I turned it off, and then back on. I turned the fan speed up as high as it would go, and the clicking stopped. The clicking has not returned at any speed setting. The fan has been running non-stop for about 2 weeks. I should add that Mars Hydro contacted me a couple of days after my purchase to inform me that there might be issues with the fan, and if there were to let them know and they will take would take care of it. They also offered me a free 5gl grow bag.

### ⭐⭐⭐⭐⭐ Quality product
*by R***B on 23 June 2026*

Been running quietly for over a year. Quality product.

### ⭐⭐⭐⭐⭐ Efficient and super quiet
*by L***L on 7 April 2023*

Awesome fan. Put it on a humidify sensor to vent my chicken coop and it works flawlessly. Would definitely buy again

## Frequently Bought Together

- MARS HYDRO 4 Inch Inline Fan Combo with Variable Speed Controller, Quiet Cooling Booster Fan,205 CFM Exhaust Fan for Grow Tents and Hydroponics
- MARS HYDRO TS1000 150W LED Grow Light for Indoor Plants, with Patented Reflector, 5 Levels Dimmable Lights Daisy Chain Full Spectrum Growing Lamps for Seedlings Veg Bloom in 2x2/3x3 Grow Tent

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*Product available on Desertcart Austria*
*Store origin: AT*
*Last updated: 2026-07-20*