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Mars Hydro iFresh 4-Inch Smart Inline Duct Fan and Carbon Filter Combo Ventilation For Grow Tent

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Free Shipping to the United States on Orders Over $59
Lifetime Customer Support



Order Processing

 As soon as you place the order, an order confirmation will be emailed to you. This means we have received your order and payment. As soon as we receive your order, we automatically reach out to our warehouse to confirm the product is in stock and is available for immediate shipment. In rare cases, if the product is on backorder or unavailable, we will contact you immediately and ask if you would like to wait for the product to become available or have your payment refunded.

If the item is available for immediate shipment (1-3 business days) we will submit the order for processing and arrange shipment. If the item title shows preorder for your country, your order is preorder. Preorder will ship out in 2 weeks after you placed the order.

 Marshydro reserves the right to notify you of any additional shipping charges necessary to deliver your order. you’d be notified of any additional charges necessary to deliver your order.Extra shipping charges will be decided by the carrier and the products you want to purchase. We will also notify the exact shipping cost in the mail.

You will have the right to modify or cancel your order for a full refund after notified.


Order Tracking

The tracking number for the order will be sent to the email address provided in 36 business hours after the Order Processing . And you can check the updated status when login to your account. Also we will email you later to follow up the delivery time and remind you to pick up the package in time if any unexpected situation happens. So pls make sure your mailbox and phone are available,and care about your order within 7 days.So you will not miss any news about the package.

If you did not receive a tracking number by email or need to confirm the tracking information, please contact us at [email protected] .we will reply to you in 12 bussiness hours.If your tracking number not work in 3 working days after you get it,pls email to us.Occasionally there may be a mix-up in the warehouse and you may have received an incorrect tracking number.we will send you the available one.Sometimes special circumstances will delay logistics updates.we will check and feedback to you.



Change order

If you have to change your order after you completed the payment,please contact us ([email protected]) for the first time when you realize that.we will reply to you ASAP and try our best to correct it.Please understand that if the item has shipped from the warehouse,the changing maybe will not success,or there is time and cost increase. 


Anything about shipping policy pls contact  [email protected]


Shipping cost and Time

United States: Shipping fee calculated on check out page(0-120USD);  shipping time 3-5 business days

Canada: Shipping fee calculated on check out page(0-200USD);  shipping time 3-8 business days

Australia: Shipping fee calculated on check out page(0-24USD);  shipping time 4-8 business days

UK: Shipping fee calculated on check out page(0-240USD);  shipping time 3-8 business days

EU: Shipping fee calculated on check out page(0-310USD);  shipping time 3-10 business days

Russia: Shipping fee calculated on check out page(0-4USD);  shipping time 5-10 business days



Seven Warehouses

MarsHydro owns seven warehouse including China,America,Australia,Canada,EU,United Kingdom, Russia. you will need to choose the corresponding store to place your order.choose it from the top right corner of the website home page.



China Warehouse(Factory)

Support orders for the following countries and regions:

Except USA,UK,EU,Canada, Australia,Russia,(where we have warehouses). The other countries' order will be shipped from China. Such as, Indonesia,Japan,Macau,Malaysia,Philippines,Singapore,SouthKorea,Thailand,Brazil,Chile ,Cambodia,Israel ,Iran,Vietnam,New Zealand, Mexico, Turkey...There will be extra shipping and import tax fee(taken by your country’s customs)

All shippments can be made with 3 business days after customers’ confirmation.

There will be import tax which customers need to pay.



America Warehouse

Support all orders in the United States Mainland. Shipments come via UPS or USPS carriers. No import tax.

For Puerto Rico ,Hawaii,Alaska, shipment will from China warehouse and an extra shipping cost will be needed.we will send you an extra shipping quote by email in 24 working-hours after you placed the order.shipments come via UPS or FEDEX carriers.There will be import tax which customers need to pay.



Australia Warehouse

Support orders for Australia.All shipments come via Aupost or Toll carriers. No import tax.



Canada Warehouse

Support orders from Canada. all shipments come via Canadapost, Toll or UPS carriers normally . No import tax.



EU Warehouse

Support orders for 24 European countries: 21 countries of them .(including Germany,Belgium,Luxembourg, Slovakia, Czech, Hungary, Austria, Netherlands, Denmark, France,Ireland, Italy,Poland,Slovenia,Spain,Finland,Latvia,Lithuania,Sweden,Bulgaria,Estonia,Portugal,Romania,Greece,Cyprus,Croatia,Malta, ) No import tax.

ICELAND,ANDORRA,LIECHTENSTEIN,MACEDONIA,NORWAY,SWITZERLAND,UKRAINE,VATICAN CITY, SAN MARINO, Monaco, have different shipping ways. They can be shipped from China with extra shipping fee. We will notify within 24 working hours. Or they can be shipped from EU warehouse but customer need to clear the customs yourselves. We will also notify this within 24 working hours. Customers can choose ways they like. There will be import tax which customers need to pay.

All shipments come DHL or GLS carriers from Germany warehouse(Ireland will ship from UK warehouse). When the item out of stock in Germany warehosue and it is available in UK warehouse,it can be shipped from UK warehouse and a little extra shipping will be needed.



United Kingdom Warehouse

All shipments come via DHL, YODEL, Royal Mail or DPD normally.  No import tax.



Russia Warehouse

All shipment from Russina warehouse for Russia buyersNo import tax.

All shipments come via IML normally.




Your Order Shows Delivered But You Don’t Have It

If your tracking number shows delivered on the shipping company’s website but you don’t have it, please do the following:

• Check the area around your home for the package and ask anyone it may have been left with.

• If the package is not found please call the shipping company’s directly to report a missing you can get the logistics information fastest.

• Pls email to us about it at the same time.( [email protected])

Marshydro can not be held responsible for packages stolen from the delivery address so please be sure to ship to a secure location!If the items are lost, weneed at least 30 days to investigate. so after we provide the tracking number, hope you can follow the logistics dynamics of the items , continue to view our mail about the notification,so you will recieve the items successfully.



Shipping Disclaimers

There are rare and unforeseen events out of our control that may effect shipping times. Severe weather conditions, catastrophic events, or failures by our delivery partners can cause unexpected delays.Most carriers will not ship to PO Boxes. If you enter a PO Box for your shipping address, we may have to contact you for an alternate delivery address.Please note that if you are placing an international order may still have taxes or duties, which you are responsible for.

Quick Overview

Fan/Duct/Filter Size: 4 Inch
Airflow: 205CFM
Noise: 26.8dBA
Controller Type: Phone APP Control

The Mars Hydro 4'' Smart Ventilation Kit includes a 4" inline duct fan that can be controlled via the app, as well as a high-efficiency charcoal filter and ducting system. This kit provides an intelligent cooling and filtration system for your grow tent, regulating and purifying the airflow and climate within your grow room.

Ventilation Kits Include:

Included in the ventilation kit are a 4" inline duct fan, a 4" carbon filter, a speed controller, a 25-ft flexible duct tube, 3 duct clamps, and 2 hanging straps.


For a tutorial on how to use the Mars Hydro iFresh smart inline duct fan, please visit


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More Information
VoltageAC ~ 110-240V
Fan ControllerSmart Controller
100% of 100

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Noise26.8 dBA
APP Controlsupport
Dimension303*202*190 mm

Powerful and Quiet Inline Duct Fan

The Mars Hydro iFresh 4-inch inline fan utilizes a mixed-flow design and a PWM-controlled EC motor, allowing it to generate up to 205 CFM of airflow while producing minimal noise. This makes it suitable for ventilating and cooling grow tents ranging in size from 2x2 feet, 2.3x2.3 feet and 3x3 feet.

Activated Charcoal Filter Carbon Filter

The Mars Hydro carbon filter employs activated charcoal to effectively eliminate unwanted odors and particulates from grow tents and rooms. The filter's double-sided steel mesh body has a 53% open area for airflow, ensuring that the odor absorption and elimination process is thorough. The filter also includes a prefilter cloth that should not be removed while in use.

Remote Real-Time Environmental Data Sensor

By downloading the Mars Hydro app, indoor growers can connect to the iFresh 4-inch inline duct fan and access various smart features such as OTA remote control, climate triggers, alarms, and loop timers, all of which can be easily controlled from their smartphone. Fan speed and on/off functions can also be adjusted with a simple touch.

Daily Loop Timer Growing Schedule

The Mars Hydro iFresh 6-inch inline fan features a probe sensor that provides real-time monitoring of key climate data, such as temperature and relative humidity. Growers can easily view the fan speed, airflow, and climate data on the app screen, regardless of their location. With the loop timing schedule feature, growers can set a start time and duration for the fan to operate automatically.

Automatically Triggered By Climate Changes

The climate trigger feature allows growers to set a "safe range" of temperature and humidity, enabling the inline fan to operate at maximum speed when the temperature or humidity falls outside of that range. This ensures that the grow room maintains an optimal climate without the need for frequent adjustments.

Alerts and Notifications for Safety

The iFresh smart inline fan includes an alarms and notifications feature that immediately sends alerts to the user's phone when any suspicious behavior or triggers are detected in the grow room.