Mars Hydro 4" Inline Duct Fan with Thermostat Controller – 205 CFM Quiet Ventilation

Enhance ventilation in your indoor garden with the Mars Hydro 4-Inch Inline Duct Fan. Designed for quiet, efficient airflow, this fan delivers up to 205 CFM and includes a built-in thermostat controller for automatic climate management. Ideal for grow tents, indoor vegetable or herb gardens, and small enclosed growing spaces.

Suitable for both hydroponic and traditional soil gardening, this compact fan helps maintain stable air circulation, supporting healthy plant growth and odor control.

Key Features

Thermostat-Controlled Ventilation
Automatically adjusts fan speed based on room temperature to keep growing conditions optimal for plants.

High Airflow, Compact Design
Delivers 205 CFM of airflow in a 4-inch housing—perfect for small to medium grow tents and indoor spaces.

Quiet Operation
Runs below 28 decibels for near-silent performance in indoor environments such as closets, bedrooms, or greenhouses.

Easy to Install and Maintain
Removable duct ends with locking tabs and a 4.9-foot power cord make setup simple and flexible.

Built for Long-Term Use
Equipped with dual ball bearings and certified by RoHS and CE standards for quality and durability.

Specifications

• Fan Size: 4 inch

• Airflow: 205 CFM (≈320 m³/h)

• Noise Level: <28–35 dB

• Speed: 2600 RPM

• Power: 40W

• Voltage: AC 110–240V

• Cord Length: 4.9 ft

• Dimensions: 11.9 x 8 x 7.4 in

• Weight: 1.8 kg

• Controller Type: Thermostat / Variable Speed

Recommended For

• Indoor grow tents (2x2 to 4x4 ft)

• Indoor gardening for vegetables, herbs, and houseplants

• Air and odor control in closets, grow rooms, and greenhouses

• Quiet airflow in hydroponic or soil-based setups