DAOTAILI 4" Grow Tent Fans 2-Pack — Automatic Humidity Control & LCD Temp/Humidity Meter

DAOTAILI’s 2-pack 4-inch grow tent fans combine precise temperature and humidity sensing with adjustable, quiet airflow for healthier indoor plants.

These compact fans are built for small greenhouses, hydroponic systems, and grow tents where steady air circulation and moisture control matter. Each kit contains two 4" fans, one of which links to a sensor/controller that displays real-time temperature and relative humidity on an LCD. Set a humidity threshold and the controller starts the fan automatically, helping avoid stagnant air and humidity swings without constant manual adjustments.

How does the automatic humidity control work?

The controller reads ambient humidity from an onboard sensor and compares it to the limit you set. When humidity exceeds that value, the linked fan powers on and runs at the speed you selected until levels fall back within range. This hands-off operation reduces the need for frequent monitoring while protecting plants from prolonged dampness.

• Adjustable humidity setpoint via the LCD controller
• Automatic on/off based on real-time readings
• Continues to display temperature and humidity for easy checks

Can these fans fit different installation setups?

Yes—each fan ships with adjustable U-brackets designed to clamp onto round, square, or flat support rods from 0.12 to 0.9 inches. The brackets are tool-free for quick repositioning inside tents or on shelving. Compact size also makes them easy to mount horizontally or vertically depending on airflow needs.

• U-brackets for 0.12–0.9 inch rods—no tools required
• Clips allow quick angle adjustment and repositioning
• Fits small tents, hydro racks, and hobby greenhouses

What noise level and speed control options are available?

Each DAOTAILI fan offers four speed settings—low, medium, high, and turbo—so you can match airflow to plant stage or tent size. Noise is kept to a minimum, rated around 25 dB at lower speeds, making these fans suitable for indoor grow rooms and nearby living spaces. Single-button controls make switching speeds fast and intuitive.

• Four selectable speeds tailored to plant needs
• Low operating noise (~25 dB) for quiet rooms
• One-button speed changes for easy adjustments

How does the dual-fan setup benefit circulation?

The package includes a primary fan with the controller and a secondary fan to broaden air coverage. Running both provides smoother air distribution across multiple plant levels and reduces hot or humid pockets. Use the second fan alone for additional air exchange or pair them for targeted crossflow.

• Main fan connected to the sensor for automated control
• Secondary fan increases overall airflow coverage
• Flexible placement for cross-ventilation or spot cooling

Who this is for: growers with small- to medium-sized tents, hobby hydroponic gardeners, and anyone needing quiet, automated airflow in compact indoor gardens. DAOTAILI’s 4" dual-fan kit is especially useful when you want precise humidity management, low-noise operation, and simple, tool-free installation without bulky ducting or complex controllers.