It is the law to ensure that there is a appropriate supply of clean, fresh air in workplaces, communal buildings and places of education. This has not changed during the pandemic but has become even more essential than before. When someone with the virus coughs or sneezes, the water droplets can remain in the air if there is poor ventilation. The virus can then spread to other people who breathe in the water droplets. Simply put if you are indoors with someone you do not live with, it is important to reduce the risks by introducing as much fresh air as possible. But how can you do this?

You can reduce the risks by either natural ventilation (opening windows and doors) or mechanical ventilation (ventilation systems that bring fresh air from the outside in).

To start with it is important to

  • identify poorly ventilated areas
  • assess the risk from breathing in small particles of the virus
  • decide on the steps you can take to improve ventilation


If you have a ventilation system it is best to set it to it’s maximum setting, allowing as much fresh air into the building as possible and reducing the amount that is being recirculated. Relying on your ventilation system to bring in the fresh air means it is important to keep the system maintained and cleaned. Without the proper cleaning and maintenance filters and ducting can become clogged with dust and debris this making it ineffective.

Other factors to remember, if you are opening doors or windows make sure they are not fire doors. It is important to remember all aspects of health and safety and not to increase risks elsewhere.

For further information on our ventilation cleaning and auditing, please contact us on 0203 6408 247 or email us at

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