Widely Used The 4-inch inline duct fan is suitable for use in homes, offices, warehouses, restaurants, shops, shopping malls, grow tents, greenhouses, and other spaces where air circulation is needed. Overheat Protection The motor operates at a low temperature with minimal heat generation. Built-in thermal protection disconnects the circuit if the motor overheats, providing added safety. Efficient Airflow Designed with a high-quality sleeve motor for quiet and energy-efficient operation. Rotational speed of 2800 r/min delivers an airflow of 140 CFM. DIY HVAC Integration Can be used alone or with multiple fans to customize ventilation systems based on space requirements. Capable of moving air through carbon filters, long duct runs, or grow light reflectors. Helps exchange stale air with fresh air to maintain optimal temperature and humidity levels, and can cool reflectors effectively. Safe and Environmentally Friendly Constructed with durable materials for reliable performance. Non-Insulated Flex Aluminum Ducting Includes steel wire reinforcement for durability and long-lasting use. Specifications: Voltage: 220V 50Hz Input Power: 25W Speed: 2800 RPM Air Volume: 140 m/h Running Noise: 3035 dB Fan Size: Diameter: 93 mm; Height: 78 mm Ducting Length: 1 m Color: Black Material: Metal Package Contents: 1 x Duct Fan 1 x Aluminum Ducting 2 x Clamps Note: Light reflection and display settings may cause slight color variations between the image and the actual item. Measurement allows for an error of +/- 13 cm.