Mars Hydro iFresh 4″ Inline Extractor Fan 205 CFM – Smart Grow Tent Ventilation with EC Speed ​​Controller

The Mars Hydro iFresh 4" (100 mm) Inline Extractor Fan 205 CFM is a smart, energy-efficient, and whisper-quiet ventilation solution for grow tents, indoor grow rooms, and hydroponic systems. This advanced inline fan is specifically designed for growers who want maximum control over temperature, humidity, and air exchange within a controlled indoor growing environment.

With a powerful airflow of 205 CFM (≈348 m³/h) and an efficient EC motor with PWM control, the iFresh delivers stable, even ventilation with minimal energy consumption. Thanks to the integrated Auto mode (2025 version), the fan automatically adjusts its speed based on set temperature and humidity values—ideal for optimal VPD control in grow tents.

The compact 4-inch (100 mm) design makes this exhaust fan perfect for small to medium-sized grow tents, micro-grows, and compact indoor setups. Fully compatible with 4" carbon filters for effective odor control.

Key Features

• 205 CFM Powerful Airflow
  Designed for efficient extraction and air exchange in small to medium-sized grow tents up to ±90×90 cm.
• Whisper-quiet – Only 26 dBA
  EC motor technology ensures extremely quiet operation, ideal for home use and noise-sensitive areas.
• Advanced EC Motor with PWM Control
  Precise speed control (3000 ±10% RPM) for optimal balance between airflow and energy consumption.
• Smart App Control
  USB-based smart controller with control via the iFresh App for real-time monitoring and settings.
• Auto Mode (New 2025)
  Standard operation at 25% power, automatic scaling up when set temperature or humidity values ​​are exceeded.
• Fully Compatible with Carbon Filters
  Suitable for 4″ (100 mm) filters for effective odor control and professional air purification.

Technical Specifications

• Fan / Duct / Filter Size: 4 Inch (100 mm)
  
• Airflow: 205 CFM (≈ 348 m³/h)
  
• Speed: 3000 ±10% RPM
  
• Static pressure: 347 ±10% Pa
  
• Voltage: 110 – 240 VAC
  
• Frequency: 50/60 Hz
  
• Input power: 27W ±5%
  
• Nominal current: 0.4A (MAX)
  
• Operating temperature: −20°C to 60°C
  
• Water protection: IP44
  
• Dimensions: 30.2 × 16.3 × 9.7 cm

Benefits of Indoor Growing

• Stable temperature control in grow tents
  
• Precise humidity control for optimal VPD
  
• Energy-efficient ventilation with low heat development
  
• Automatic speed control without manual adjustments
  
• Suitable for LED grow light setups with higher heat output
  
• Ideal for hydroponics and closed indoor systems

Applications

• Grow tents up to ±90×90 cm
• Hydroponic systems
• Indoor grow rooms
• Micro-grow setups
• Controlled climate chambers

Why Choose the Mars Hydro iFresh 4″?

The iFresh 4" is more than just a standard extractor fan. Thanks to the combination of EC motor technology, smart app integration, and automatic climate control, this fan offers professional performance in a compact size.

For growers who want maximum control over their indoor growing climate, minimize energy consumption, and take a professional approach to odor control, this is an essential upgrade.