Future Cities and Environment

Table 20 Annual use of primary energy for heating, DHW and lighting in Scenarios Present State ÷ 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

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