Extract Flow Testing or Ventilation Testing has been a mandatory part of building regulations since 2010. It is essential that all new builds conduct a test to ensure compliance with Part F of the Building Regulations.
An extract flow test measures air flow rates of mechanical ventilation systems (such as extractor fans/oven hoods) installed in new properties. Part F of building regulations is concerned with reducing the amount of uncontrolled airflow throughout a property and therefore increasing its overall air tightness.
All new builds must meet the minimum standards set by Building Regulations, making an extract flow test a crucial step in the planning process. As buildings are becoming more insulated and air tight it is essential that appropriate ventilation systems are in place in order to maintain airflow throughout the property.
Extract units are typically placed in rooms where air moisture and pollutants are released (kitchens and bathrooms etc), in order to prevent mould and dampness which may impact on occupants' health.
The test is relatively straightforward and can be carried out alongside an air tightness test (also required). The inspection will cover the following areas:
It is generally more cost effective to carry out an extract flow test alongside an air tightness test, the timing of which will vary depending on the property type.
For single units, an air tightness test should be conducted at the end of construction, before final approval is given. If your project involves multiple units then testing should be carried out during the construction of the first 25% of the dwelling type.
We highly recommend that you get in touch with us first. Our expert energy consultants can then advise you on the compliance requirements for your specific property/ properties.
An Extract Flow Test is carried out on site and is therefore not conducted by Elmhurst Energy Services. Our consultants take the results from the test in order to incorporate them into the final SAP or SBEM calculation, however we can recommend trusted third party assessors to carry out the test.
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