Technical Guidance - Strategies for mitigating the risk of overheating in current and future climate scenarios

The importance of designing domestic buildings to perform well in both winter and summer in terms of energy efficiency and comfort is being recognised as key to good design. In summer, well-insulated buildings are at risk of overheating if not effectively shaded and ventilated and this risk is likely to increase with the effects of climate change – posing potentially serious health risks to residents.

By modelling different Passivhaus standard buildings, over a range of future climate scenarios, insights can be found into which measures to control overheating may be necessary. These recommendations apply equally to ‘standard’ buildings, particularly as building regulations tighten.

Software models used to calculate the risk of overheating have their advantages and disadvantages. The key is to apply models appropriate to each specific situation. While a single result may not tell the full story in terms of the risk of overheating that occur (and particular care must be taken with multi-residential buildings) competent analysts using appropriate models effectively can identify cost-effective measures that significantly reduce the risks in most situations .

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