This white paper, released by the European Solar Shading Organisation (ES-SO) focuses on the overheating risk in low energy buildings with the aim to strengthen the awareness of member states of a growing problem which is not sufficiently addressed in the current Energy Performance of Buildings Directive (EPBD). The paper brings up the growing problem of people suffering from uncomfortable indoor temperature.
According to the document, an explicit article on overheating has to be included in the EPBD review:
- A universally accepted definition of overheating in dwellings should be adopted, and member states should develop in the national building code robust national thresholds for dealing with overheating in new build and renovation for use by planners, designers, builders and authorities.
- In low energy buildings the cooling load has to be considered as equally important as the heating load and this for both summer and winter conditions.
- The evaluation of the risk of overheating in new and renovated buildings/dwellings shall be done not only at overall building level but also at individual room level for a situation as built.
- As energy efficiency is priority number one (the cheapest energy is the one you don’t use) the building envelope (building shell) has to be considered first (before the use of mechanical systems).
- In the transparent part of the building envelope measures to avoid overheating have to be included among which dynamic (smart) shading to the glazing. Priority shall be given to passive measures such as shading before active cooling can be applied.
For further information please visit the ES-SO website at the link provided below, to download and read the paper .