The National Ventilation MON-S100HT is a 100mm (4-inch) domestic extractor fan specifically designed for bathrooms and wetrooms.
It is part of the Monsoon Silence range, known for balancing high extraction rates with ultra-quiet operation.
Key Features
Humidistat & Timer: This model includes an integrated humidity sensor that automatically activates the fan when moisture levels rise (adjustable from 60–90% RH) and an overrun timer (adjustable from 2–30 minutes).
Silent Operation: It operates at noise levels as low as 22–25 dB(A) at 3 metres, roughly equivalent to a quiet whisper.
Energy Efficient: The motor consumes only 7.5 watts, meeting modern energy-efficiency building regulations (Part L).
Zone 1 Rated: With an IP45 ingress protection rating, it is safe for installation in "Zone 1" areas, such as directly above a shower.
Technical Specifications
Extraction Rate 97m³/h (27 litres per second)
Hole Diameter 100mm (4")
Motor Type Long-life ball bearing (rated for 40,000 hours)
Mounting Wall or ceiling
Dimensions 158mm (W) x 136mm (H) x 133mm (D)
Extra Features Built-in backdraught shutter and anti-vibration rubber mounts
| Size | 100 mm |
| Brand | National Ventilation |