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What is Part F Building Regulation?
Part F of the Building Regulations sets legal requirements for ventilation in new and existing buildings across England. It works alongside Part L (energy efficiency) to balance airtightness with indoor air quality, preventing issues such as damp, mould, and CO₂ build-up.
Part F defines standards for:
Ventilation rates in dwellings and non-domestic buildings.
Extraction systems in kitchens, bathrooms, and wet rooms.
Background ventilation (trickle vents or mechanical systems).
Commissioning and testing to confirm systems meet design performance.
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