---
product_id: 581428088
title: "Mars Hdyro iFresh 4 Inch Smart Inline Duct Fan with Variable Speed Controller, 205 CFM App Control Ventilation Exhaust Fan for Grow Tents, Hydroponics"
brand: "mars hydro"
price: "€ 121.38"
currency: EUR
in_stock: true
reviews_count: 8
category: "Mars Hydro"
url: https://www.desertcart.ie/products/581428088-mars-hdyro-ifresh-4-inch-smart-inline-duct-fan-variable
store_origin: IE
region: Ireland
---

# App & remote control Real-time temp & humidity 205 CFM airflow Mars Hdyro iFresh 4 Inch Smart Inline Duct Fan with Variable Speed Controller, 205 CFM App Control Ventilation Exhaust Fan for Grow Tents, Hydroponics

**Brand:** mars hydro
**Price:** € 121.38
**Availability:** ✅ In Stock

## Summary

> 🌱 Elevate your indoor grow game with smart airflow mastery!

## Quick Answers

- **What is this?** Mars Hdyro iFresh 4 Inch Smart Inline Duct Fan with Variable Speed Controller, 205 CFM App Control Ventilation Exhaust Fan for Grow Tents, Hydroponics by mars hydro
- **How much does it cost?** € 121.38 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/581428088-mars-hdyro-ifresh-4-inch-smart-inline-duct-fan-variable)

## 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

- • **Smart Climate Control:** Manage your grow tent environment remotely with the Mars Hydro app—adjust fan speed, set alarms, and automate with climate triggers.
- • **Customizable Loop Timing:** Set daily start times and durations for automatic fan operation, so your grow room stays perfectly ventilated on your schedule.
- • **Automated Climate Triggers:** Fan automatically ramps up when temperature or humidity stray from your preset safe range—maintain ideal conditions effortlessly.
- • **Powerful & Quiet Performance:** 2600 RPM mixed-flow motor delivers 205 CFM airflow with whisper-quiet operation, ensuring optimal ventilation without noise disruption.
- • **Real-Time Environmental Monitoring:** Stay informed with live temperature and humidity data displayed on your smartphone for precise climate management.

## Overview

The Mars Hydro iFresh 4 Inch Smart Inline Duct Fan combines powerful 205 CFM airflow with advanced app-controlled features, including real-time climate monitoring and automated fan speed adjustments. Designed for hydroponics and grow tents, it offers quiet, efficient ventilation with customizable schedules and climate-triggered operation to maintain optimal growing conditions remotely.

## Description

desertcart.com: Mars Hdyro iFresh 4 Inch Smart Inline Duct Fan with Variable Speed Controller, 205 CFM App Control Ventilation Exhaust Fan for Grow Tents, Hydroponics : Patio, Lawn & Garden

Review: nice inline setup - great fan, maintains temp and humidity much better than old setup. fan is fairly quiet and carbon filter works wonders. definitely recommend if looking to upgrade indoor exhaust system.
Review: Great fan, great customer service. - UPDATE: Great fan from a great company with some of the better customer support I've dealt with. Purchased in December and left the initial review. I was contacted by Mars Hydro in regards to my problem. I told them I was fine with what I received and left it at that. Jump forward almost 5 months later to the other night when I responded to their message. After a few back and forth messages, trying everything they suggested, we finally found the solution. If you're phone can't find the device in BT, make sure your location on your phone/tablet is turned ON. I'm not sure if this is stated in the operation manual or anything. They were still willing to help me fix the problem even after I told them I was okay with it not being the right one and not responding to their messages for months. This may be the first instance where customer support actually helped me to fix a problem. ORIGINAL: I ordered the iFresh inline fan, that's supposed to connect to an app on your phone. I either just can't get mine to even be discoverable on the app or I wasn't given the correct fan and just got a normal one with a speed controller and a useless temperature probe. I followed the instructions on the Mars Hydro site on how to connect it and how to reset it. Clicking the speed controller on and off 3-5 times in quick succession will cause the fan to make a clicking noise 3 times letting you know it was reset. Mine doesn't do that which make me think it's just the regular speed controlled fan.

## Features

- Smart Ventilation For Indoor Grows: Download Mars Hydro APP to connect 4 inch inline duct fan and growers can enjoy OTA remote control and smart features including alarms, climate triggers, loop timers with a few clicks on their smartphone, Fan speed and on/off can also be done with your finger.
- Powerful Inline Fan: Mars Hydro iFresh 4 inch exhaust inline fan runs at 2600 RPM and provides 205 CFM of airflow with low noise thanks to its PWM-controlled EC-powered motor and mixed-flow design.
- Real-Time Environment Data Monitor: 4 inch inline fan comes with a probe sensor so key climate data- temperature and relative humidity- can be displayed in real-time on the APP screen, whether you are near your grow unit or not. When the inline ventilation fan is operating, growers can get a clear picture of the duct fan speed (RPM) and airflow (CFM) on the screen.
- Loop Timing Schedule: By setting a start time and duration, Mars Hydro iFresh 4 inch inline duct fan will automatically start working at a preset time each day and complete its task at the end of the duration. Inline fan speed is the default speed.
- Climate Triggers: Growers have the option to select an alternative automated configuration- climate trigger. By establishing a designated "safe range" for temperature and humidity, the inline fan will activate at maximum speed when the temperature or humidity is not within that range. Grow room consistently maintains an ideal climate.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BRSKN2W7 |
| Air Flow Capacity | 205 Cubic Feet Per Minute |
| Best Sellers Rank | #114,403 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #66 in Greenhouse Ventilation Equipment |
| Blade Material | Plastic |
| Brand | MARS HYDRO |
| Brand Name | MARS HYDRO |
| Collection Name | Inline Duct Fans |
| Color | Black |
| Control Method | App, Remote |
| Controller Type | App Control, Remote Control |
| Customer Reviews | 4.2 out of 5 stars 111 Reviews |
| Electric Fan Design | Blower |
| Electric fan design | Blower |
| Finish Type | Glossy |
| Indoor Outdoor Usage | Indoor |
| Is Electric | Yes |
| Is Product Cordless | No |
| Manufacturer | MARS HYDRO |
| Material | Metal |
| Model Name | iFresh |
| Model Number | iFresh 4 Inch Smart Inline Fan |
| Mounting Type | Wall Mount |
| Number of Power Levels | 3 |
| Power Source | Corded Electric |
| Recommended Uses For Product | Exhausting |
| Speed | 2600 RPM |
| Standby Power Shutoff | High Efficiency |
| Style | Modern |
| Unit Count | 1.0 Count |
| Wattage | 30 watts |

## Product Details

- **Brand:** MARS HYDRO
- **Color:** Black
- **Controller Type:** App Control, Remote Control
- **Electric fan design:** Blower
- **Material:** Metal
- **Mounting Type:** Wall Mount
- **Power Source:** Corded Electric
- **Recommended Uses For Product:** Exhausting
- **Style:** Modern
- **Wattage:** 30 watts

## Images

![Mars Hdyro iFresh 4 Inch Smart Inline Duct Fan with Variable Speed Controller, 205 CFM App Control Ventilation Exhaust Fan for Grow Tents, Hydroponics - Image 1](https://m.media-amazon.com/images/I/61wSGqgInNL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ nice inline setup
*by A***M on July 17, 2025*

great fan, maintains temp and humidity much better than old setup. fan is fairly quiet and carbon filter works wonders. definitely recommend if looking to upgrade indoor exhaust system.

### ⭐⭐⭐⭐⭐ Great fan, great customer service.
*by S***M on January 10, 2024*

UPDATE: Great fan from a great company with some of the better customer support I've dealt with. Purchased in December and left the initial review. I was contacted by Mars Hydro in regards to my problem. I told them I was fine with what I received and left it at that. Jump forward almost 5 months later to the other night when I responded to their message. After a few back and forth messages, trying everything they suggested, we finally found the solution. If you're phone can't find the device in BT, make sure your location on your phone/tablet is turned ON. I'm not sure if this is stated in the operation manual or anything. They were still willing to help me fix the problem even after I told them I was okay with it not being the right one and not responding to their messages for months. This may be the first instance where customer support actually helped me to fix a problem. ORIGINAL: I ordered the iFresh inline fan, that's supposed to connect to an app on your phone. I either just can't get mine to even be discoverable on the app or I wasn't given the correct fan and just got a normal one with a speed controller and a useless temperature probe. I followed the instructions on the Mars Hydro site on how to connect it and how to reset it. Clicking the speed controller on and off 3-5 times in quick succession will cause the fan to make a clicking noise 3 times letting you know it was reset. Mine doesn't do that which make me think it's just the regular speed controlled fan.

### ⭐⭐⭐⭐ Loose Fit with Carbon Filter
*by R***R on November 4, 2024*

I wanted to like this product because I've bought their tent and lights, and they were great. First, the straps are just tedious, slow and tedious. I would have been better off just using zip ties, because the straps are way to long for a tent this size, and they're cheap feeling. Second, the carbon filter and inline fan are a very loose fit. It needs to be snug to prevent the smell from escaping, and I had to use duct tape to seel it. If there was some sort of coupler that conjoins them, that was missing as well. Third, the smart controller is now integrated into the fan, so it can be accessed via the app, but there was no mention that it had been changed, and the installation video still shows the old system. Confusing. Fourth, there were no instructions of any kind, and I had to use YouTube to get an idea of what I was supposed to do. Most of the instructions were for use of the old version of smart controller. The fan and filter do look to be of decent quality, and the fan is quiet.

## Frequently Bought Together

- Mars Hdyro iFresh 4 Inch Smart Inline Duct Fan with Variable Speed Controller, Temperature and Humidity Probe Sensor, 205 CFM App Control Ventilation Exhaust Fan for Grow Tents, Hydroponics
- AC Infinity Flexible 4-Inch Aluminum Ducting, Heavy-Duty Four-Layer Protection, 8-Feet Long for Heating Cooling Ventilation and Exhaust
- MARS HYDRO 4 Inch Carbon Filter, Inline Air Filter Odor Control with Australian Virgin Charcoal, Carbon Filter for Inline Fan, Grow Tent, Hydroponics, Pre-Filter Included, Reversible Flange

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-31*