150mm Bathroom Fan with Humidity Sensor, Adjustable Timer and Check Valve A practical ventilation solution for bathrooms and living areas that activates automatically when humidity rises and continues running for a set period after use. Designed for easy integration with standard 150mm ducting, the unit includes a built-in humidity sensor, adjustable timer run-on, and an integrated check valve to prevent backflow. Key benefits and why you need it Automatic humidity control: The integrated humidity sensor switches the fan on when moisture levels rise, helping to remove excess moisture quickly and reduce condensation on surfaces. Timed run-on for thorough ventilation: The adjustable timer keeps the fan running after the room is vacated to clear remaining damp air and odors. Backdraft prevention: The built-in check valve stops outside air and drafts from entering when the fan is off. Simple compatibility and installation: Sized for 150mm ductwork for a straightforward replacement or installation in ceiling or wall mount locations. Reliable everyday performance: Designed for continuous household use in bathrooms, en suites, cloakrooms, and other living areas that need controlled ventilation. Features and attributes Function: Humidity-triggered automatic operation plus manual or timed run-on to maintain air exchange after use. Compatibility: Fits standard 150mm ventilation ducts and common mounting arrangements for domestic bathrooms and living spaces. Size: 150mm duct diameter specification for compatibility with existing duct systems. Performance: Rapid activation based on humidity levels with adjustable timer settings for run-on duration. Maintenance: Accessible design for routine cleaning and simple filter or grille removal where applicable. Installation: Connects to household electrical supply; installation by a qualified electrician or competent installer is recommended. Practical use scenarios Family bathroom: Automatically ventilates during and after showers to clear steam and reduce condensation on mirrors and tiles. Windowless en suite or cloakroom: Provides reliable air exchange where natural ventilation is limited or absent. Living area or utility room: Removes lingering cooking or laundry odors and helps maintain air movement in rooms without adequate natural airflow. What is included and notes Integrated humidity sensor, adjustable timer run-on, and check valve built into a 150mm duct fan unit. Designed for domestic ventilation applications; check local wiring regulations and use a qualified installer for electrical connections.