The NVA MON-S100T is a 100mm (4-inch) Monsoon Silence Bathroom Extractor Fan with an adjustable overrun timer, manufactured by National Ventilation.
It is designed for ultra-quiet operation and high energy efficiency, making it suitable for modern bathrooms, wetrooms, and en-suites.
Key Features & Performance
Quiet Operation: Operates at noise levels as low as 22–25 dB(A) at 3 metres, roughly equivalent to a quiet whisper.
Adjustable Timer: Features a built-in overrun timer that can be set to run for 2 to 30 minutes after the light switch is turned off to ensure humidity is fully extracted.
Extraction Rate: Delivers an airflow performance of 97 m³/h (27 litres per second).
Energy Efficiency: Uses a low-energy 7.5W motor with a Specific Fan Power (SFP) as low as 0.27 W/L/S, complying with Building Regulations Part F & L.
Bathroom Zone 1 Ready: Rated IP45, meaning it can be safely installed in Zone 1 (within the splash zone of a shower or bath) when protected by a 30mA RCD.
Technical Specifications
Duct Size 100mm (4 inches)
Motor Type Long-life ball bearing (up to 40,000 hours)
Voltage 230V / 240V
Material UV-resistant ABS plastic (prevents yellowing)
Mounting Wall, ceiling, or window (with kit)
Included Integral backdraught shutters to prevent heat loss
| Size | 100 mm |
| Brand | National Ventilation |