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Installation must be carried out by a qualified electrician.
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Suitable for indoor use.
The Knightsbridge EX1THWH Extractor Fan is an advanced, intelligent ventilation solution combining automatic humidity detection with adjustable timer control for optimal air quality management. Featuring a clean white finish, this 4-inch (100mm) fan is designed for wall or ceiling installation in bathrooms, toilets, and utility rooms. The integrated humidistat automatically activates the fan when moisture levels rise, preventing condensation and mould growth without user intervention. Combined with the adjustable over-run timer (2-30 minutes), it ensures thorough extraction even after the room is vacated. Operating at a whisper-quiet 28.5dBA while delivering 24 litres per second extraction, it maintains comfort without compromise. With IP45 protection, double insulation, and compliance with Building Regulations Part F & Part L, the EX1THWH delivers intelligent, energy-efficient performance backed by a 3-year manufacturer warranty.
Integrated Humidistat: Automatic activation when humidity levels rise, providing intelligent moisture control.
Adjustable Over-Run Timer: 2-30 minute adjustable run-on timer (preset 2 minutes) for continued post-occupancy extraction.
Clean White Finish: Versatile, neutral appearance suits any interior decor.
Low Noise Operation: Quiet 28.5dBA at 3m for discreet, unobtrusive operation.
Effective Extraction Rate: 24 litres per second airflow for efficient ventilation.
4 Inch (100mm) Diameter: Standard size suitable for wall or ceiling installation.
IP45 Rated: Protected against water jets, suitable for bathroom zones.
Double Insulated: No earth connection required for safe installation.
Building Regulations Compliant: Meets Part F (ventilation) and Part L (conservation of fuel and power) requirements.
Automatic Operation: Humidistat eliminates need for manual switching.
Easy Installation: 102mm cut-out diameter for straightforward fitting.
3 Year Manufacturer Warranty: Comprehensive coverage for peace of mind.
Versatile Applications: Ideal for bathrooms, toilets, utility rooms, and kitchens.
| Specification | Details |
|---|---|
| Brand | Knightsbridge |
| Model | EX1THWH |
| Product Type | Extractor Fan with Timer & Humidistat |
| Finish | White |
| Fan Diameter | 100mm (4 Inch) |
| Extraction Rate | 24 l/s |
| Noise Level | 28.5dBA at 3m |
| Humidistat | Integrated automatic humidity control |
| Timer | Adjustable 2-30 minutes (preset 2 mins) |
| IP Rating | IP45 |
| Insulation | Double Insulated (Class II) |
| Cut-Out Diameter | 102mm |
| Dimensions | 157.6mm (H) x 157.6mm (W) x 127.2mm (D) |
| Voltage | 230V 50Hz |
| Compliance | Building Regulations Part F & Part L |
| Warranty | 3 Years |
| Applications | Bathrooms, toilets, utility rooms |
1. How does the humidistat function improve bathroom ventilation?
The humidistat automatically detects rising humidity levels (from showers, baths) and activates the fan without needing to switch on the light, ensuring immediate moisture extraction even when the bathroom is occupied during daytime.
2. Can the humidistat and timer work together or independently?
Both functions work in harmony - the humidistat triggers automatic activation based on humidity, while the timer ensures the fan continues running for a set period after humidity levels drop, providing comprehensive moisture control.
3. What humidity level triggers the fan to activate?
The humidistat is typically preset to activate around 60-70% relative humidity, the threshold where condensation risk increases. This can often be adjusted internally for fine-tuning to specific environments.
4. Is this fan suitable for rental properties where tenants may forget to ventilate?
Absolutely - the automatic humidistat control ensures ventilation occurs regardless of occupant behavior, protecting the property from condensation, mould, and damp damage while complying with building regulations.
5. Does the humidistat override the timer function?
The humidistat and timer work sequentially - the humidistat activates the fan when needed, and the timer takes over to ensure continued operation after humidity normalizes, providing complete automatic ventilation cycles.
