Overheating Analysis
What you need to know.
Overheating assessments help predict the thermal performance of a dwelling, ensuring it meets the requirements of Part O of the Building Regulations. These assessments are essential for many new residential developments and are used to demonstrate that the risk of overheating has been appropriately considered and mitigated through the building design. As temperatures continue to rise and homes become more airtight, designing dwellings that maintain comfortable internal conditions without excessive reliance on mechanical cooling has never been more important.
Internal temperatures are assessed using dynamic thermal modelling in accordance with CIBSE TM59. To comply with Part O, a property must demonstrate that overheating risk is adequately controlled, typically by satisfying the relevant TM59 performance criteria for living rooms, bedrooms, and other habitable spaces. Where a development is located in a higher-risk area or adopts complex design features, more detailed analysis may be required to demonstrate compliance.
Why Choose Us?
Home+ Energy can support your project by carrying out the required Part O overheating assessment in accordance with CIBSE TM59. We review your proposed building design, including glazing, shading, ventilation strategy, and occupancy assumptions, to assess overheating risk and demonstrate compliance with Building Regulations.
Fast Turnaround
Get your report quickly so your project keeps moving.
Clear, Simple guidance
No confusing technical language, just what you need to stay compliant.
Competitive Pricing
High‑quality service without the inflated fees.
Expert Support
Need advice on meeting tighter water targets? We’ll guide you through the best options.
Be ready for now and what’s next. Home+ Energy supports you through both current SAP compliance and the transition to the Future Homes Standard.