Heading towards the nZEB through CHP+HP systems. A comparison between retrofit solutions able to increase the energy performance for the heating and domestic hot water production in residential buildings
Optimize consumptions in the field of civil construction led to define energy classes for residential buildings. To calculate the energy demand in buildings the EPgl was determined (annual consumptions per m2 of primary energy). This paper examines those technical solutions useful to optimize the energy demands for the building heating during space-heating season and domestic hot water production (thanks to energy analysis software as MC11300 and TRNSYS), and at the same time keep into consideration the financial issues that those interventions implied.