Keep the duct short and smooth
Long flexible ducting, sharp bends and cold loft routes reduce airflow and can collect condensation. Rigid, insulated routes are often more reliable where the building allows.
Use controls that match real moisture
A timer, humidistat or continuous low-rate system can keep extraction working after the light goes off. The room also needs a path for replacement air.
Clean and check the system
Dusty grilles and stuck backdraught shutters reduce flow. Regular checks are simple and stop the fan becoming a forgotten fitting.
What to remember
A clear outside route and enough run time matter more than a fan's headline size on the box.Bathroom fitters Glasgow
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