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Technical Booklet F1 Conservation of Fuel and Power in Dwellings·Page 32·2.48b

Nearly zero-energy building requirements for flats

New flats must achieve a DER that is at least 25% better than the TER, expressed as DER(nzeb flat) ≤ 0.75 x TER.

flatsenergy
the DER for flats should better the TER by a minimum of 25%. DER(nzeb flat) ≤ 0.75 x TER This means that if, for example, the TER provided by SAP is 20 kgCO2e/m2/yr, then a new flat would require a DER of 15 kgCO2e/m2/yr, or less.

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