A building that has a very high energy performance. This means they need a very low amount of energy, fuelled mainly by renewable energy sources, in these houses or nearby. NZEB homes will be 70% more energy efficient and emit 70% less carbon dioxide than those built under previous building rules.
Example: New homes must be Nearly Zero Energy Buildings (NZEB) and typically have an “A2” Building Energy Rating (BER). These houses have high levels of insulation. They have mechanical ventilation systems and renewable heating systems or solar panels.
You can find out more information at www.gov.ie/en/publication/39fe4-energy-performance-of-buildings/