Ventilation Testing

Follow us on

  • Facebook - Grey Circle
  • Twitter - Grey Circle

Part F Building Regulations 2010 introduced the requirement to verify practical performance of ventilation in new dwellings against design. This requires validation of airflow measurements for every dwelling constructed under this edition of the Building Regulations as well as ensuring that the system has been configured correctly.


NSL provides a cost-effective ventilation testing service which can be conducted alongside sound insulation and air tightness testing for minimal site disruption.


The tests must be undertaken using UKAS calibrated equipment and should be conducted by an engineer registered with a competent scheme with respect to "domestic ventilation technologies". Where the engineer undertaking the testing is not registered a 25% penalty will be applied within SAP. All NSL Compliance engineers have successfully completed the BPEC Domestic Ventilation course.


These tests are required not only for system 4 (Continuous mechanical balanced system with heat recovery), but also for system 1 (Background ventilators and intermittent extract fans) and system 3 (Continuous mechanical extract).


In order to ascertain the correct ventilation rates required we will need the following information:

  • SAP calculation worksheets for each dwelling

  • ventilation type

  • floor plans and sections for each dwelling

  • occupant schedule