What are Overheating Calculations?

Overheating calculations assess the risk of a property overheating during the summer months.

As properties are become more energy efficient, overheating calculations are also becoming increasingly common in the early planning stages due to its impact on the design and cost of a project.

Why would I need Overheating Calculations for a property?

Assessment of new homes and residential properties (such as care homes) is now mandated under the Approved Document O (AD-O / Part O) of the Building Regulations.

When should I use Dynamic Modelling over Simple Calculations?

In London and Manchester, overheating calculations must be demonstrated at the planning stage using Dynamic Modelling. Elsewhere in England and Wales, compliance can be demonstrated with the Simplified Method of assessment.

Why should I use Dynamic Modelling over Simple Calculations?

In both cases, Dynamic Modelling provides a more accurate estimation of overheating risks. It can account for variations in external conditions (weather patterns, solar angles, and occupancy size), and can allow for evaluation various scenarios, such as window sizing and differing ventilation systems.