The Xpelair 93235AA Simply Silent Window Kit is designed for efficient ventilation in any home. This 100mm white kit is suitable for single, double, or triple-glazed window mounting applications with a thickness of up to 43mm. Its silent running feature ensures minimal noise, making it perfect for bedrooms and quiet spaces. The kit can be fully installed from inside the building, allowing for easy setup without the need for external access. With a duct size diameter of 115mm, this kit is ideal for maintaining air quality while blending seamlessly into your decor. Weighing just 0.435kg, it is lightweight yet durable, providing a reliable solution for your ventilation needs. Suitable for single, double or triple-glazed window mounting applications up to 43mm thick, the kit can be fully installed from inside the building. Hole size: 115mm Duct Size Diameter: 115 mm.