4-Inch Grow Tent Inline Duct Fan, Smart Temperature & Humidity Control, Automatic Ventilation System, for Grow Tents, Mushroom Rooms, Greenhouses (2-Pack)
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FREE refund/replacement until Jan 31, 2026
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Availability:
In Stock.
Arrives
Thursday, Mar 19
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Features
- Dual Fan Expansion An additional auxiliary fan enhances airflow and improves ventilation in enclosed spaces. The fan operates quietly with low-voltage DC power, making it ideal for long-term use.
- LCD Real-Time DisplayOnce the sensor is inserted, the high-definition LCD screen displays the current temperature and humidity, making environmental changes clear at a glance and allowing precise control over the growing conditions.
- Smart Auto ModeSet the temperature (50F ~ 140F) and humidity (1% ~ 99%) thresholds. When the values exceed the set limits, the fan automatically starts; when they fall below the set value, the fan stops, ensuring your plants thrive with ease.
- Mode Switching You can easily switch to manual mode to start the fan without affecting the auto mode settings. In auto mode, the system runs automatically based on your settings, meeting different growing and ventilation needs.
- Wide ApplicationComes with stainless steel mounting brackets and various screws, suitable for use in grow tents, mushroom rooms, small greenhouses, and other enclosed spaces, creating the perfect environment for plant growth.
Brand: DAOTAILI
Color: black
Electric fan design: Exhaust Fan
Power Source: DC Power Supply
Style: Industrial
Special Feature: LCD Real-Time Display, Smart Auto Mode, Mode Switching
Indoor/Outdoor Usage: Indoor
Model Name: AHF03d-x
Is Cordless?: No
Manufacturer: DAOTAILI
Brand: DAOTAILI
Color: black
Electric fan design: Exhaust Fan
Power Source: DC Power Supply
Style: Industrial
Special Feature: LCD Real-Time Display, Smart Auto Mode, Mode Switching
Indoor/Outdoor Usage: Indoor
Model Name: AHF03d-x
Is Cordless?: No
Manufacturer: DAOTAILI
Installation Type: mounted
Product Dimensions: 5.43 x 4.8 x 6.34 inches
Item Weight: 4.64 pounds
Item model number: AHF03d-x
Date First Available: April 26, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Thursday, Mar 19
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
This dual fan expansion system is a smart solution for maintaining ideal conditions in enclosed environments. Designed for grow tents, mushroom rooms, and small greenhouses, it features a quiet, low-voltage fan and a high-definition LCD that clearly displays real-time temperature and humidity. The auto mode activates the fan when user-set thresholds are exceeded (50°F–140°F and 1%–99% RH), and stops it when conditions normalize. Manual override is also available. Easy to install with included stainless steel brackets, this system offers precise, automated ventilation for optimal plant health.
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Reviewed in the United States on June 18, 2025 by Joost Santos
This fan is powerful and works well to help regulate the temperature and humidity in my greenhouse. It is quiet when in use. The humidity gauge works well. The instructions are easy to follow and makes this easy to assemble. The assembly is light weight and made of sturdy metal. It feels durable and like it will last a while. It does not include the duct hose. The fan is fixed and does not oscillate.
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Reviewed in the United States on June 16, 2025 by Dawn T Conway
We plan to use this ventilation kit for our next grow tent grow. They fit the 4 inch size ports in our grow tent perfectly. It seems well made and durable. The 2 fans should give good additional air flow to our 5x5 tent. The fans are easy to install and use.
Reviewed in the United States on June 10, 2025 by Del Sol Nursery
This inline duct fan is compact, powerful, and surprisingly quiet. It’s perfect for hydroponics setups or small indoor gardens, helping regulate airflow effectively. Easy to install and adjust, it’s a practical choice for anyone in need of a reliable ventilation solution. Also it's decently priced for a good quality as competitive brands can get pricy. I’d definitely consider this as opposed to a big name brand if you’re looking for affordable. I currently have it installed in my greenhouse setup and it has been working great!
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Reviewed in the United States on May 26, 2025 by Aeiou
This duct fan completely leveled up my grow room! The automatic venting adjusts based on climate settings, keeping temperature and humidity in the ideal range without manual tweaks. Super quiet and effective—my plants have never looked healthier.
Reviewed in the United States on June 13, 2025 by I Candy
4-Inch Grow Tent Inline Duct Fan works exactly as described. The second fan is not being used at this tie. The LCD display is clear and bright (I don’t even need my reading glasses!). I really like that if I want to manually turn the fan on or off, it does not affect the auto function settings I previously set. My greenhouse plants are enjoying this duct fan!
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Reviewed in the United States on May 22, 2025 by Nanci W
I love that this has one plug for two fans. The fan has humidity and temperature readings on each fan. I think these would be great for any grow tent or small greenhouse. Or even for under a small structure where seeds are under plastic. They are easy to install and well made. The only problem is that the cord between the two fans is only about a foot long,, so you do have to put them side by side.
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Reviewed in the United States on May 28, 2025 by Reviewer
Great product exactly as described. Would recommend to everyone, and super fast shipping.
Reviewed in the United States on May 12, 2025 by hippiechicsku-20