New Black Square Waterfall Cloakroom Basin Mixer Tap Sink Mono Bathroom + Waste. 2X Modern Tall Faucet Counter Basin Mixer Tap High Rise Bathroom Sink Matt Black. High Performance: This duct fan has an airflow capacity of up to 540 m³/h. Equipped with ball bearings to ensure the duct fan operates at a low noise level of around 38dB.