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Table 12 Annual use of primary energy for heating in Present State, Retrofit 1 and Retrofit 2, kWh

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
Present State 12,301 23,306 9697 8096 12,285 10,879 76,564
Retrofit 1 5937 11813 4453 3079 5014 3718 34,013
Retrofit 2 3725 7927 2299 2085 2839 2738 21,614