With whisper-quiet operation and energy-efficient performance, these fans provide a quiet and comfortable environment within your home. Quiet Operation - Low Noise Design: These fans adopt a distinctive resonance-noise-absorption structure design. Minimising the transmission of noise from blower to exterior. Reducing the operation noise to incredibly low levels, creating a tranquil and silent environment. The double chamber structure, allows noise to be effectively absorbed and reduced between the double orifice and casing. Energy Saving - DC Motor Our fans feature a DC Motor to reduce power consumption and save energy. The DC Motor operating temperature is comparatively lower than AC motors, providing a longer life than their AC counterparts. Constant Air Volume Our fans are equipped with intelligent technology, allowing them to automatically maintain constant air volume within the fan operating limits, to suit varying external static pressures (see performance curve in the brochure). 24 Hour Ventilation Instead of switching off after the run-on timer is finished, the fan can be set to then run at a low airflow setting continuously (avoiding mould and damp issues). This feature is optional and can be configured to suit each home's individual requirements. Built-In Run-On Timer Equipped with a run-on timer, the fan can be configured to either switch off or switch to 24-hour ventilation mode after 15 minutes. Count On Panasonic Our fans are manufactured to the highest quality standards to ensure years of reliable comfort.