Acoustic body offers clarity on overheating regulation

The Q&A document details compliance requirements for Approved Document O

The Association of Noise Consultants (ANC) has created a free guidance document on the recently published ‘Overheating’ Approved Document O (ADO) for England.

After several enquiries seeking clarity over the acoustic requirements of ADO, which came into force in June 2022, the ANC has produced a Q&A document.

It covers some of the main questions relating to the acoustic requirements of ADO, which lists four methods for removing excess heat.

The most suitable method for controlling overheating – limiting unwanted solar gains within residential properties – must take account of several factors, one of which is noise in bedrooms during night-time periods. From an acoustic perspective, the ADO says that open windows can be used as the ‘dominant method’ for removing excess heat as long as outdoor noise levels are low enough.

However, restricted window openings may be required to satisfy the noise thresholds set out in the ADO. If a certain level is exceeded, an open window is unlikely to be an option at night and mechanical ventilation may be required.

The ANC’s guidance says it is ‘essential’ to engage an acoustic consultant at an early stage of the development process to understand the implications of satisfying the noise aspects of ADO.

This summer, the ANC is due to launch a more comprehensive overview – Guide to demonstrating compliance with the noise requirements of Approved Document O.

The Overheating ADO is available to view at