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Table 20 Annual use of primary energy for heating, DHW and lighting in Scenarios Present State รท Retrofit 4, kWh and kWh/m2

From: Planned energy-efficient retrofitting of a residential building in Italy

Scenario Ap. 1a Ap. 1b Ap. 2a Ap. 2b Ap. 3a Ap. 3b Building per m2
Present State 15,484 26,111 12,489 10,895 15,077 13,678 93,734 332.5
Retrofit 1 9120 14,618 7245 5878 7806 6517 51,184 181.6
Retrofit 2 6908 10,733 5091 4884 5631 5537 38,784 137.6
Retrofit 3 3175 6162 2231 2111 2540 2484 18,703 66.3
Retrofit 4 2844 5669 1941 1820 2250 2194 16,719 59.3