TM52 Overheating Analysis
CIBSE TM52 overheating assessments for planning, compliance and comfort.
What it is
TM52 provides the CIBSE assessment framework for the risk of summertime overheating in non-domestic buildings, using three criteria for hours of exceedance, weighted exceedance, and upper-limit temperatures.
Who needs it
Design teams for schools, offices, healthcare, and residential-above-commercial schemes required by planning or Part O to demonstrate acceptable overheating risk.
When it's required
At planning submission, Building Control, and where overheating is a specific planning condition.
What we provide
- [01]TM52 overheating risk assessment via DSM
- [02]TM59 residential overheating analysis where relevant
- [03]Passive design and mitigation optioneering
- [04]Planning-ready reporting
Related services
How this compares
Side-by-side breakdowns of the standards and routes most often confused with this service.
Common questions
[01]What is a TM52 overheating assessment?+
TM52 is CIBSE's framework for assessing the risk of summertime overheating in non-domestic buildings, using three criteria to demonstrate acceptable thermal comfort.
[02]What is Dynamic Simulation Modelling (DSM)?+
Dynamic Simulation Modelling is a computational method that simulates a building's performance hour by hour across a full year using real weather data, occupancy patterns and system behaviour. It predicts energy consumption, thermal comfort and indoor conditions far more accurately than steady-state tools, which is why it underpins Level 5 EPCs, TM52, TM54 and Part L compliance for complex buildings.
[03]What is a CIBSE TM52 overheating assessment?+
TM52 is the CIBSE methodology for assessing overheating risk in naturally ventilated, non-domestic buildings using three adaptive comfort criteria applied to a full year of simulated data. Planning authorities increasingly require a TM52 assessment to show a scheme will remain comfortable without resorting to mechanical cooling.
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Same team on services design and compliance modelling. UK-wide, from London and York.