Telescopic Vertical Window Fan 35-155cm Optional, Punch-Free Window Exhaust Fan for Home, Bedroom, Kitchen, Stepless Speed Control-1pcs

High-Speed Silent Window Exhaust Fan, 2800 RPM with Stepless Speed Control, Punch-Free Installation, For Bedroom Living Room Office VentilationA ventilation fan that is genuinely tool-free. It requires no tools, no drilling, and no complex installation. Features:- Punch-free installation allows for easy movement between rooms. - 2800 rpm fan keeps indoor air fresh. - Low decibel and quiet operation, the lowest level of the whole machine is 36 decibels. - Adjustable-speed power supply allows for flexible airflow control. - Easy disassembly and cleaning; even for use on rainy days. - The number of fans is increased or decreased according to the length.Parameters:Name: Punch-Free Window Exhaust Fan Input Voltage: 110-220V Output Voltage: 12V Fan Dimensions: 13cm x 13cm Air Volume: 85m³/h per fan Noise: Maximum 41dba per fan Speed: 2800 RPM Power: 2.4W per fan Standard Configuration: 6 fans per meter Color: Gray/Black/White Material: 304 Stainless Steel Width: 15cm Thickness: 5cm Length: 35-155cm (Optional)Applicable Scope:Room Volume x Air Change Rate/Fan = Actual Number of Fans Required Bedrooms typically have 1-2 air changes per hourWhat You Get:Exhaust Fan x 1 Power Cord x 1

• FULL RANGE OF SIZES: This window exhaust fan is available in sizes from 35-155cm, suitable for most vertical windows. Includes power supply, for home, kitchen and commercial ventilation
• RETRACTABLE DESIGN: Each fan retracts to 18 cm, no need to worry about size, seamlessly adapts to your space while providing efficient airflow. It has both functional and beautiful appearance
• EFFICIENT COOLING: This vertical window fan has a speed of up to 2800 rpm. With a speed controller, you can adjust the air volume at will, and keep the indoor air flowing easily
• LOW NOISE OPERATION: This upgraded exhaust fan can keep noise low even at high speeds, with a minimum of 36 decibels in the entire machine, and will not disturb your sleep, work, study or rest time
• APPLICATION: The body is light and thin, not only suitable for kitchens and bathrooms, but also for study rooms, offices, storage rooms and other small spaces that require improved ventilation