Passivhaus Affiliate

Keeping Cool: avoiding overheating risks

Date: On demand course Time: N/A
Location: Online Cost: PHT member: £40+VAT Non-member: £60+VAT

Keeping cool: online course

Recent summer heatwaves have made us more aware than ever that the risk of overheating in both new and existing buildings demands attention - and is likely to become even more of a concern as our climate warms.

As a comfort driven approach, the Passivhaus standard includes a summer overheating criterion which requires that internal temperatures do not exceed 25ºC for more than 10% of the year. However, as with all models, the assessment is highly dependent on the assumptions that are made during the modelling process. We need to ensure that the result remains robust when those assumptions vary, for example as occupant behaviour changes, or as the climate warms.

To meet this need, the Passivhaus Trust has developed a PHPP plugin accompanied by detailed guidance covering design strategies to reduce risk, limitations and constraints that may have an impact, key indicators of the likelihood of risk, and a series of stress test to demonstrate robustness.

This short course explains the guidance in detail and teaches you how to use the PHPP plugin.


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John Palmer


Delivered by John Palmer, author of the guidance and PHPP plugin.





The course comprises two on demand video modules and an optional live online workshop. Places on the workshop are limited, so you must register in advance via the booking link on the online course page.

Module 1

On demand video (40 mins)

The first video module explores the questions of how buildings overheat and whether Passivhaus buildings overheat, and explains strategies to counter overheating as well as key indicators and stress test.

Module 2

On demand video (25 mins)

The second video module provides detailed instructions for using the new PHPP plugin to assess and address overheating risk.

Live review and Q&A

Live online workshop
Date TBC 

The live workshop will offer a quick review of what you've learned, a further in-depth look at the more detailed guidance published to accompany the PHPP plugin, and the chance to have your questions answered. Places are limited to facilitate discussion and engagement so you must register in advance.


Course fees

PHT members £40+VAT

Non-members £60+VAT



Please book online.

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Further information

PHT Guidance: Avoiding summer overheating

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