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Thursday 18 May 2023

Overheating & Part O – What does this mean for Residential Design?
Carolyn Caceres - Arup
Antonietta Canta - Arup
James Heale
y - UK Overheating

Venue: The Building Centre, Store Street, London WC!E 7BT

Time; 7.45 - 10.15am

A recent report indicated that under the current weather conditions, half of UK homes suffer from overheating risk, based on CIBSE TM59 criteria. The risk is particularly high in the south of England, with London being the hottest spot. Overheating negatively impacts people’s lives, causing sleep disruption that affects health and productivity. It can also cause illness, and significantly more deaths will result as a direct consequence of increased temperatures in the 2050s.

The aim of requirement O1 of the Building Regulations is to protect the health and welfare of occupants of a building by reducing the occurrence of high indoor temperatures. This requirement is met by designing and constructing the building to limit unwanted solar gains in summer, and provide an adequate means of removing excess heat from the indoor environment.

Come and join us as our expert panel discuss:


  • What is the scale of the problem of overheating in the UK and who is most affected?

  • What can be done to alleviate the problem in the short and long term?

  • What is the impact does Part O have going forward on new developments, renewals and refurbishments?

  • What are the implications of other issues such as acoustics, pollution and security?



Carolyn Caceres

Energy and sustainability consultant for the built environment. Advocating for the development of net zero carbon buildings to tackle climate change. Interested in global Sustainable Development Goals (SDGs), energy demand reduction through passive design, energy efficiency, renewable energy technologies and building occupants wellbeing.

Supporter of the Low Energy Transition Initiative (LETI). Previous experience in e
nergy policy and air quality in Latin America.


Antonietta Canta

Principal Energy & Building Performance Engineer specialised in Low Carbon Design for buildings and sustainability. Broad experience in energy strategies for a wide range of building types and mixed-use developments with a growing interest in optimisation design and parametric modelling. Developing skills in design leadership and project management to deliver exceptional solutions thanks to integrated design and innovative approaches.

James Healey
UK Overheating


James is a founding partner of UK Overheating and is an expert in acoustics and overheating. He is a principal author of the Acoustics, Ventilation and Overheating: Residential Design Guide and of the Guide to Demonstrating Compliance with the Noise Requirements of Approved Document O.

He is also a contributor to the Future Homes Hub document Part O 2021 (England) Technical Guidance. James further advances his contribution to industry as Chairman of the Institute of Acoustics specialist Building Acoustics Group.

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