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Overheating Risk Assessment Training

Learn how to carry out Overheating Risk Assessments for new build properties, with Elmhurst’s Overheating training. With new building regulations being introduce, buildings in England will begin to require Overheating Risk Assessments, making this an exciting area to get involved in!

✅ IES and DesignBuilder training routes available
✅ Provide overheating risk assessments through the detailed method of showing compliance with Part O
✅ Offer alongside SAP calculations

IES or DesignBuilder Overheating Training (Live Online)

Book a place on one of Elmhurst’s Overheating training courses. (Please note you must have experience of using IES or DesignBuilder for Dynamic Thermal Modelling (DTM) or have completed the IES or DesignBuilder pre-course on demand training).


Don't have software experience for Dynamical Thermal Modelling?

Not to worry, you can attend one of Elmhurst’s IES/ DesignBuilder Overheating and Dynamic Thermal Modeling (DTM) training courses.


Why provide Overheating Risk Assessments? 

The current building and design practices have led to many unintended consequences, including a link to the increase of overheating in homes. The problem cases of overheating in homes is projected to increase with the effect of climate change in the UK making it an area of concern. Studies have shown that overheating in homes is a risk to health, wellbeing, productivity and in worst cases can lead to mortality in the most vulnerable. For this reason UK governments have committed to ensuring overheating is mitigated in new homes.

Required for compliance

Research by DLHUC concluded that the existing methodology for assessing overheating through SAP is unable to comprehensively asses the risk of overheating as a result…

Department for Levelling Up, Housing and Communities (DLUHC) has introduced a new Building Regulation (Part O) making it a legal requirement for developers to provide Building Control Bodies with evidence to show they have reduced the risk of overheating. Therefore from 15th June 2022 all new dwellings in England will require an overheating assessment, with Wales and Scotland proposing similar approaches.

Approved document O has been created to provide guidance on meeting the requirements of Part O where a routes of compliance is through either the simplified method (a prescribed table of limits to achieve) or the detailed method of Dynamic Thermal Modelling (DTM). This detailed route of compliance is expected to be used in a variety of cases such as assessing many flats and single aspect dwellings, as well assessing those dwellings that do not meet the requirements of the simplified method and where more design flexibility is needed.

Provide a comprehensive service

As someone who has received specialist training on the detailed method and DTM you will have relevant expertise to show compliance with Part O. You should be able to model the buildings in scope of the building regulation and mitigation measures to provide a comprehensive service to clients which can be done alongside SAP and SBEM assessments.

What's involved with Overheating Risk Assessments?

The detailed method of showing compliance with Part O requires the assessor to ‘build’ a 3D model of the dwelling in a suitable modelling software (such as DesignBuilder or IES).

To complete the model the assessor needs information about the building which includes data about it thermal mass, glazing schedules, ventilation and shading. Weather data is then used to predict the internal temperatures of modelled dwelling, which is compared against a standard to determine if it passes or fails the requirements.

Most high-rise buildings and buildings in city centers will require Dynamic Thermal Analysis using either DesignBuilder or IES software.

When becoming an Overheating Risk Assessor using DTM it is useful to have understanding of construction and building design. You will also need suitable DTM training and training on overheating assessments using DTM. Overheating training course for both assessors with or without DTM experience are available on our training calendar provided by the two biggest software providers in this field: DesignBuilder or IES.



Much like SAP work, the amount you can earn from providing Overheating Risk Assessments will vary depending on the size and complexity of the property.

Many Overheating Risk Assessors have or build links with architects and house builders through other work, such as SAP calculations. Most clients appreciate the convenience of keeping
everything ‘under one roof’, which is why it’s an excellent service to offer existing

Alternatively you could choose to reach out to those providing SAP calculations to offer your services.

Furthermore, anyone who joins our Overheating Competency Scheme will be added to our list competent assessors which is available to industry and the public looking for this type of assessor.

IES/ DesignBuilder Overheating Training is a one day online course. For those who have no experience in Dynamic Thermal Modelling wanting to train and attend the one day course, there is additional on demand training. The on demand training is a series of online pre-recorded webinars that must be completed before the one day overheating course, equating to roughly 20 hours.


The introduction of Part O in England makes it a legal requirement for developers to provide Building Control Bodies with evidence to show they have reduced the risk of overheating. Therefore from 15th June 2022 all new dwellings in England will require an overheating assessment, with Wales and Scotland proposing similar approaches.

As an Overheating Risk Assessor who uses Dynamic Thermal Modelling, you will be able to provide overheating assessments through the detailed method of approved document O. The benefit is that this a comprehensive assessment which can provide clients with more design flexibility.

You do not have to join a competency scheme to provide Overheating Risk Assessments however membership of Elmhurst’s Overheating Competency Scheme will demonstrate competence and quality to clients. You will also have access to an exclusive range of member benefits such as newsletters, guides and having your details featured on the website.   

You will need an appropriate software licence to complete overheating assessments using dynamic thermal analysis though either of the providers (DesignBuilder or IES). To purchase or enquire about costs please contact them directly.

You will also need a copy of the CIBSE TM59 methodology (subject to changes in AD O) and the CIBSE weather files required to complete TM59 assessments. These can both be purchased through CIBSE.

Why choose Elmhurst for Overheating Training?

Quality lies at the heart of what we do, and it all starts with the training that we offer. We strive to equip individuals with the skills and knowledge required to deliver quality energy assessment services. Since 1993 we have trained thousands of individuals and have evolved our courses to reflect the changing landscape of training delivery and energy assessment.

✔️ Leave feeling confidentleave feeling confident that you can put theory into practice
✔️ Learn at your own paceour courses cater for those completely new and familiar with energy assessment
✔️ An engaging learning experience– Our trainers have the practical experience and know how to deliver a truly engaging learning experience
✔️ Support beyond the trainingAs the UK’s largest government approved energy assessor scheme, we can provide technical support to you, not only during your training, but also long after you’ve completed it

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Become a Member of Elmhurst's Overheating Competency Scheme

Once you have successfully completed the Overheating course you can apply to join Elmhurst’s Overheating Competency Scheme. Being a member of a scheme provides reassurance to clients that you are trained and competent to provide Inventory Reports in-line with the latest industry standards.