Optimal Buildings’ Energy Consumption Calculus through a Distributed Experiment Execution

Table 5

Cost-energy optimization. Energy and economic results of base case, cost-optimal measure, and deep renovation.

	Base case	Cost-optimal	Deep renov.
Passive	Base case	Façade air chamber insulation	Façade and roof insulation
Heating + DHW	Conventional NG boiler	Condensing NG boiler	Condensing NG boiler + S. thermal
Cooling	Conventional AC split	Conventional AC split	Efficient AC split
PV solar system	No	No	Yes
Lighting	CFL	LED	LED
Awareness campaign	No	Yes	Yes
Primary energy kWh/yr⋅dw	15,114	8,704	5,208
Primary energy saving; %	—	42	65
CO2 reduction; %	—	47	70
Energy label	E	C	A
Global cost; €/dw	38,000	33,850	52,717
Initial investment; €/dw	0	4,594	22,831