On 1 January 2021, the requirements for Nearly Energy Neutral Buildings (BENG) came into effect. This means the end of the EPC (energy performance coefficient). It will be replaced by the NTA8800, also known as BENG.
Four indicators play an important role for the installer:
- BENG 1: the energy requirement for heating and cooling;
- BENG 2: the amount of fossil energy for building-related functions;
- BENG 3: the share of renewable energy;
- TOjuly: the chance of temperature exceedance.
A building must meet all four requirements. In order to meet BENG, a 'sufficient' must be achieved on all components. Where BENG requirements 1 and 3 are feasible, BENG 2 is more difficult to achieve and the TOjuli makes meeting the BENG standard a real challenge. The TOjuli must reduce the chance of temperature exceedance, in the EPC calculation there has never been a guarantee against overheating. Due to climate change, the TOjuli has been added as the fourth requirement to the BENG. Overheating must be limited, no matter how good the energy performance of a home is.
For an installer, BENG 2, BENG 3 and TOjuli are particularly important. These requirements concern an efficient installation for heating, hot water and ventilation, the use of solar energy and ambient heat, and active and passive cooling.
All requirements are interconnected, which makes it all the more important that the contractor, designer and installer come to an agreement together and choose the best solution for the home to be built. It is important, if not essential, for an installer to know which measures are effective in meeting the BENG requirements.
The government has about the NTA 8800 a publication written. The regulations are explained using practical examples and recommendations are made on how BENG can be applied.
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