NHBC Chapter 3.2

The 2014 edition of the NHBC Standards came into effect for every NHBC registered home whose foundations begun on or after 1 January 2014. The Standards are the technical manual for NHBC registered builders with sections covering the design, material specification and sitework for each part of the build process. They provide the technical benchmark for all newly-built homes registered with NHBC.

Chapter 3.2 `Mechanical ventilation with heat recovery'.

This new Chapter has been prepared in response to the increasing use of MVHR in the UK house-building industry and emerging concerns about indoor air quality and associated health issues. It is extremely important that these systems are designed and installed correctly. Chapter 3.2 introduces technical benchmarks that will improve the quality of MVHR installations in all key areas.