Background air leakage
Some features will provide low-level background movement of air between your home's interior and exterior. This is often called air infiltration, and can cause draughts and heat loss in winter. For example:
- timber joinery around windows and doors
- flues and chimneys
- recessed ceiling and light fittings
- extractor fan grills.
It is better to plan good ventilation together with a well-insulated house, than rely on leaks and draughts which you cannot control when you need to and won’t necessarily ventilate the right places.
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