A Multiscale Differential Evolution Algorithm-Based Maintenance Plan Optimization for Building Energy Retrofitting

Table 2

Characteristics of retrofitted items.

Retrofits	Quantities	Unit price ($)	Unit energy saving (kWh)	Unit cost saving ($)	Preventive cost ($)	Corrective cost ($)
15 W retrofit CFL	338	14	105.6	11.9	N/A	14
Air conditioner	42	380	4320	486.65	N/A	175
Air conditioner	0	380	3542.3	397.95	52	N/A
Air conditioner	0	380	2651.75	278.35	70	N/A