Bathroom Extractor Fans

A good bathroom extractor fan removes moisture, odours, and humid air at source — preventing condensation, mould, and damp from building up on walls, ceilings, and grouting. Our bathroom extractor fan range covers everything from basic axial fans to whisper-quiet models with humidity sensors, timers, and smart controls, from trusted brands including Vent-Axia, Greenwood, S&P, Elta, and Xpelair.

Whether you need a ceiling-mounted fan for a small en-suite or a higher-powered unit for a large family bathroom with poor natural ventilation, use the filters below to find the right specification.

What size extractor fan do I need for my bathroom?

For most standard UK bathrooms, a fan with an airflow rate of 85–110 m³/h is sufficient. Larger bathrooms, wet rooms, or bathrooms with showers rather than baths typically benefit from a higher-rated fan — 150 m³/h or above. As a general guide, the fan should provide at least 15 air changes per hour in the bathroom volume.

What's the difference between a timer and humidity-controlled fan?

A timer fan runs for a set period after the light is switched off, then cuts out automatically. A humidity-controlled (humidistat) fan monitors moisture levels and runs whenever humidity exceeds a set threshold — making it more effective at preventing condensation because it responds to actual conditions rather than a fixed timer. For bathrooms prone to condensation or mould, a humidity-controlled fan is the better choice.

Do bathroom extractor fans need to be ducted?

Most bathroom extractor fans require ducting to vent moisture outside the property — either through an external wall or ceiling void. Some models can be installed as recirculation fans (without ducting) using a charcoal filter, but these remove odours only — not moisture — and are not suitable as the sole ventilation in a bathroom under UK Building Regulations Part F.

How noisy are bathroom extractor fans?

Noise levels are measured in dB(A). As a guide, fans below 30 dB(A) are considered very quiet (barely audible in a bathroom), 30–35 dB(A) is low-level background noise, and above 40 dB(A) becomes noticeable. Look for models labelled "silent" or "ultra-quiet" from brands like S&P Silent, Greenwood, and Vent-Axia Lo-Carbon if noise is a concern.

Are these fans compliant with UK Building Regulations?

Yes — bathroom extractor fans must meet the minimum extract rates set out in Approved Document F (Part F) of the Building Regulations. For bathrooms, this is a minimum of 15 l/s (54 m³/h) intermittent extract or 8 l/s continuous. Most fans in our range meet or exceed these requirements — check individual product specs for declared airflow.