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Table 8 Energy need for building heating in terms of primary energy with reference to all the investigated cases

From: Energy performance of a ventilation system for an apartment according to the Italian regulation

  Yearly energy demand for heating (kWh) Yearly energy demand for heat recovery (kWh] Total yearly energy demand per unit surface (kWhm−2)
Case 1 6,249 94.7
Case 2A 5,392 573 90.4
Case 2B 5,121 573 86.3
Case 3 6,454 97.8
Case 4A 5,509 286 87.8
Case 4B 5,191 286 83.0