The Extension Works
UK only: we design and build extensions in London & the South East of England (Surrey, Hampshire & Berkshire) — we can’t quote for projects outside the UK.
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utility room in extension

30 or 8 l/s? Utility Room Ventilation for Homeowners in England

See what utility room ventilation requires in England: 30 l/s intermittent or 8 l/s continuous, plus fan choices, damp checks, and extension planning.

The Extension Works 15 October 2026
30 or 8 l/s? Utility Room Ventilation for Homeowners in England