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  • Always leave trickle vents and wall vents open and unblocked by curtains or furniture, even in the winter.
  • You could use a little more energy to heat your home as well as introducing fresh air.
  • If possible, leave doors open between rooms to ensure air flows between them, unless there are fire doors, in which case they should not be left open.
  • To allow the transfer of air between rooms when the doors are closed, there should be a 10mm gap under the doors.
  • At least every six months, check and clean wall vents and extractor fans in bathrooms and kitchens.
  • The filters on your wall vents can be cleaned with a vacuum cleaner and in accordance with the manufacturer’s instructions.
  • Filters for your mechanical ventilation system can get very dirty with layers of dust and moisture. Regularly replace or clean these filters as per the manufacturer’s instructions. For whole house mechanical ventilation systems, check the manufacturer’s instructions about replacing filters. Usually these should be replaced once a year but it is advised to always follow manufacturer’s instructions.
  • Cooker hood extractors should always be used when cooking, as it can generate moisture and harmful pollutants.
  • Regularly air rooms and keep windows open as wide as possible or partly open when occupied.
  • Ensure wall and window trickle vents are kept open and not blocked.
  • Where bathroom and kitchen fans are present, set them to run permanently.

The UK Health Security Agency has issued advice on how ventilation can reduce the transmission of viruses at home:

  • Try to keep windows open as much as possible when occupied to ventilate the property.
  • Keep wall and window trickle vents open and ensure they are not blocked.
  • If bathroom and kitchen fans are present, keep them running permanently where possible.

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