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Bathroom extractor fans in 4 inch (100mm) and 6 inch (150mm) sizes, available in black and white finishes. These bathroom extractor fans remove moisture, steam, and humidity from UK bathrooms to prevent mould, damp, and condensation while improving air quality.
Choosing the Right Size: 4-Inch vs. 6-Inch Extractor Fans
Selecting the correct fan size depends entirely on the volume of your room and the level of humidity generated. UK building regulations require specific extraction rates to maintain healthy indoor air quality.
| Fan Size (mm) | Average Extraction Rate | Best Suited For | Key Application |
|---|---|---|---|
| 4-Inch (100mm) | 85 - 95 m3/hr | Small bathrooms, en-suites, cloakrooms | Standard domestic zone 2 installations |
| 6-Inch (150mm) | 220 - 250 m3/hr | Large family bathrooms, high-use wet rooms | High-humidity environments, utility rooms |
Tech Tip: If your bathroom suffers from heavy steam, lacks external windows, or uses a high-pressure rainfall shower, upgrading to a 6-inch (150mm) fan provides the rapid extraction power needed to clear the air before damp settles.
Why Efficient Bathroom Ventilation Matters
Without adequate airflow, daily showers and baths quickly create a high-humidity environment. Leaving this moisture unchecked leads to serious property issues:
- Mould and Mildew Prevention: Stops stubborn black mould growth on grout, silicone, walls, and ceilings.
- Structural Protection: Prevents peeling paint, blown plaster, and warped bathroom furniture.
- Condensation Control: Eliminates constantly fogged mirrors, damp windowsills, and pooling water.
- Air Quality Improvement: Removes stale air, trapped odours, and airborne pollutants.
Our extractor fans operate efficiently to continuously or intermittently extract humid air, keeping your space fresh, dry, and healthy.
Modern Finishes: Matte Black and Gloss White
Ventilation does not have to compromise your styling. Our collection features sleek, low-profile fascias designed to complement modern bathroom brassware and hardware trends:
- Matte Black Extractor Fans: The perfect match for contemporary, industrial, or monochrome bathroom designs utilizing black taps, showers, and wet room profiles.
- Gloss White Extractor Fans: A clean, minimal, and timeless choice that blends effortlessly into bright, traditional, or neutral ceilings.
Advanced Features for UK Domestic Installations
Engineered for standard UK domestic installations, these fans are fully compatible with standard flexible or rigid 100mm and 150mm ducting systems. Choose from three main operational models to suit your automation preferences:
- Standard On/Off Models: Wired directly to your main bathroom light switch or a separate overhead pull-cord.
- Timer Models (Run-on Timer): Keeps the fan running for a pre-set period (usually adjustable between 2 to 30 minutes) after the light is turned off to ensure all residual steam is completely cleared.
- Humidistat Models (Humidity Sensor): Automatically triggers the fan when moisture levels in the room hit a specific percentage, providing hands-free, round-the-clock protection against damp.
Fast UK Delivery and Building Regulation Compliance
Every fan in our collection complies with current UK Building Regulations (Part F) for bathroom ventilation. Built for durability, low-noise operation, and sustained airflow performance, they offer a dependable solution for any renovation, trade project, or quick replacement.
Enjoy fast, reliable UK shipping and upgrade your bathroom’s air quality today.
Frequently Asked Questions
What size extractor fan do I need for a UK bathroom?
For standard small-to-medium bathrooms, en-suites, and WCs, a 4-inch (100mm) fan with a minimum extraction rate of 54 m3/hr (15 litres per second) is required by UK building regulations. For larger bathrooms, wet rooms, or spaces with high-power showers, a 6-inch (150mm) fan is highly recommended to handle the increased steam volume.
Can these extractor fans be installed in shower zones?
Yes, but you must check the IP (Ingress Protection) rating of the specific model. Fans installed directly inside a shower cubicle or bath zone (Zone 1) typically require an IPX4 or IPX5 rating and may need to be powered by a 12V SELV (Safety Extra Low Voltage) transformer for safety. Standard wall and ceiling installations outside these zones (Zone 2) are compatible with our standard mains voltage fans.
What is the difference between a timer fan and a humidity fan?
A timer fan activates with your light switch and stays on for a set number of minutes after you turn the switch off. A humidistat fan monitors the actual moisture in the air; it turns on automatically when the room gets too steamy and turns off only when the humidity drops back down to a safe level, regardless of whether the light is on or off.
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