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What are Air Changes per Hour (ACH)?
Last Updated: 21 August 2025Air Changes per Hour (ACH) is a measure of how many times the air within a room or space is completely replaced with fresh air in one hour. It is typically expressed in units of m³/h (metres cubed per hour) or l/s (litres per second). ACH is a critical metric in assessing ventilation efficiency, particularly...
What are Acoustics?
Last Updated: 21 August 2025Acoustics is the branch of physics concerned with the production, transmission, and effects of sound. In the context of building design, acoustics focuses on creating spaces that manage sound effectively to ensure comfort, functionality, and well-being for occupants. Acoustics in buildings is a critical aspect of architectural design, particularly in the UK’s residential, retrofit, and...
What is Acoustic Attenuation?
Last Updated: 21 August 2025Acoustic attenuation refers to the reduction in the intensity or energy of sound waves as they travel through a medium or encounter barriers. In the context of UK house building, residential retrofits, and home renovations, it is a critical factor in ensuring occupant comfort by minimising noise transmission between spaces or from external sources. Acoustic...
Summary of Changes to the Building Regs Part F (Ventilation)
Last Updated: 21 August 2025Approved Document F of the Building Regulations for Ventilation has been updated and came into effect on 15th June 2022. These changes align with the UK Government’s Future Homes and Buildings Standard, focusing on energy efficiency, ventilation, and overheating. Key updates include revised ventilation system classifications, increased whole dwelling ventilation rates, and mandatory testing and...