Part O: Simplified Calculation

We offer Simplified Overheating Calculations to support compliance with Part O of the Building Regulations, helping ensure your residential designs stay comfortable and safe in warmer months.

The Simplified Method under Part O is used when a development doesn’t face significant constraints like security risks or poor air quality. It’s suitable for most low-risk residential projects where windows can be safely opened for ventilation. This approach uses predefined criteria—like window size, orientation, and shading—to assess overheating risk without the need for full dynamic simulation. It’s quicker, more cost-effective, and often sufficient for compliance, especially in well-designed homes with good natural airflow

Using industry-standard modelling, we assess how factors like glazing, shading, ventilation, and orientation affect indoor temperatures—especially in bedrooms and living spaces. 

Our reports are clear, practical, and tailored to your project, giving planners and clients confidence that overheating risks have been properly addressed.