vents

AIR TIGHTNESS AND VENTILATION IN CONTEXT

All dwellings need to have a supply of fresh air. Ventilation is necessary for a number of reasons:

  • Control of condensation.
  • Removal of pollutants.
  • Health and comfort of the dwellings occupants.
  • Ensure the safe operation of open flue appliances

It could be argued that there is a conflict between air tightness and ventilation, however, if you think of air tightness as preventing the uncontrolled movement of air, both into and out of the dwelling through the cracks and gaps in the building envelope, then you can think of designed ventilation as controlled movement of air into or out of the dwelling.

So air tightness and ventilation go hand in hand. Which means that building an air tight house and fitting the correct type of ventilation will allow the home owner to have control of their property’s ventilation rather than the ventilation being uncontrolled. However, it is important to choose the correct ventilation system to suit the design air tightness of the dwelling. This can seem very complicated and many developers have fallen foul of the ventilation regulations which can often result in expensive remedial work.

Ventilation should be seen as part of an integrated design approach when planning an existing or new build. Here at Northern Air Tightness Testing Services we are able to advise on the most appropriate ventilation for your specific build. We are also BPEC accredited to commission, test and certificate your ventilation system/extractors for your building regulation approval.

Part F building Regulations 2010 requires the verification of the performance of ventilation systems in new dwellings against design. This means that the airflow measurements for every dwelling constructed under this edition of the Building Regulations need to be validated as well as ensuring that the system has been configured correctly.

Northern Air Tightness Testing Services can provide this service either as a one off or alongside our air testing service.

The tests and configuration of extraction systems must be undertaken using UKAS calibrated equipment and undertaken by appropriately qualified engineer registered with a ”competent scheme”. All our engineers at Northern Air Testing Services engineers have successfully completed the BPEC Domestic Ventilation course.

The tests are required for System1, System 3 and System 4 extraction.

System 1

System 1 Background ventilators (trickle vents in windows) and intermittent extract fans (fans that switch on i.e. when the light is turned on) In kitchens, Utility rooms, Cloakrooms, Bathrooms and en-suites.

System 3

System 3 Continuous mechanical extract (extractor fans that run continuously and boost when required either remotely on a sensor or when a light is turned on) In kitchens, Utility rooms, Cloakrooms, Bathrooms and en-suites.

System 4

System 4 Continuous mechanical balanced system with or without heat recovery ( Vents in every room controlled by a centrally located unit, usually in the loft.