Timer Extractor Fan
Timer Extractor Fans provide effective ventilation with an adjustable overrun timer, allowing them to continue running after a light or switch is turned off.
This feature helps remove lingering moisture and odours, improving air quality and protecting against mould. Common use cases include bathrooms, toilets, kitchens, and utility rooms where humidity control is essential.
The benefits include improved hygiene, energy efficiency, and compliance with Building Regulations for residential ventilation.
YESSS Electrical stocks trusted brands such as Airflow, Envirovent and exclusive Osily Ventilation known for long-lasting and quiet extractor fans.
Popular technical specifications include fan sizes of 100mm, 120mm, and 150mm, extraction rates from 66.96m³/h up to 315m³/h, low-noise operation around 25–30dB(A), and timer settings adjustable between 2 and 20 minutes.
For reliable, hands-off ventilation, choose timer extractor fans that balance comfort, performance, and energy savings.
Zone 1 Extractor Fan with Timer, 100mm, 97m³/h, 25dB, Chrome
Zone 1 Silence Fan with Adjustable Timer, 97m³/h, White, Monsoon Energysaver Range
150mm Silent 150 Extractor Fan with Timer - White
100mm Bathroom Extract Fan with Thermoelectric Shutter and Timer, 107m³/h, 36dB, IPX4, White
100mm Silent Design 100 Extractor Fan with Timer - White
150mm Single Speed Kitchen Extract Fan with Timer, 245m³/h, 36dB, IP44, White
100mm Bathroom Extract Fan with Timer, 107m³/h, 36dB, IPX4, White
150mm SDF Axial Extractor Fan with Timer
LED Backlit Extractor Fan with Overrun Timer, 100mm, Black
Extractor Fan with Overrun Timer, 100mm, White
What is a timer extractor fan?
A timer extractor fan is a type of domestic extractor fan that continues running for a set period after being switched off. Iti is usually activated by a light and uses an adjustable overrun timer to keep extracting air once the room is no longer in use, helping to remove remaining moisture and odours.
How does a timer extractor fan work?
Timer extractor fans operate when power is supplied, typically via a bathroom or utility room light switch. When the switch is turned off, the fan continues to run to a pre-set time before stopping automatically. This delayed shut-off allows excess humidity to be properly cleared from the room rather than being left to settle.
Where are timer extractor fans commonly used?
Timer extractor fans are usually installed in bathrooms, en-suites, WCs, and utility rooms. They are especially useful in areas where moisture is produced quickly such as during showers, but lingers in the air after the room is no longer occupied.
What is the difference between a timer extractor fan and a standard extractor fan?
A standard extractor fan usually switches on and off at the same time as the light or pull cord. A timer extractor fan continues running after the switch is turned off, providing extended ventilation. This helps improve moisture control compared with basic on-off extractor fans.
Do timer extractor fans help reduce condensation and mould?
Yes. By allowing the fan to run after the room is vacated, timer extractions fans help remove residual moisture that would otherwise condense on walls, ceilings, and windows. This ongoing extraction supports better humidity control and helps the conditions that can lead to mould growth.
Are timer extractor fans compliant with Building Regulations?
Many timer extractor fans are designed to support compliance with UK Building Regulations Part F, which require adequate mechanical ventilation in moisture-producing areas such as bathrooms and WCs. Always check individual product specifications to confirm suitability for the intended installation.
Are timer extractor fans energy efficient?
Timer extractor fans are designed to run only as long as needed to clear the air. By switching off automatically after a set period, they help avoid unnecessary run time while still providing effective ventilation, making them a practical option for energy-conscious domestic applications.