Table 15 Results of calculating the economic feasibility of the passive MDU according to the general MDU by year and the bid price rate

Division	Unit	General MDU to which the Standard for Energy-saving Design by year is applied
		2001	2008	2011	2013
Annual saved amount of heating cost (A)	KRW1000	1,282	1,035	670	457
Increased amount of construction cost in case of applying the design cost (B1)	KRW1000	25,432	25,093	20,340	18,874
Increased amount of construction cost in case of applying the general qualification rate (B2)	KRW1000	22,315	22,018	17,847	16,561
Increased amount of construction cost in case of applying the bottom bid price rate (B3)	KRW1000	17,802	17,565	14,238	13,212
PB in case of applying the design cost (C1 = B1/A)	year	19.8	24.2	30.4	41.3
PB in case of applying the general bid price rate (87.745%) (C2 = B2/A)	year	17.4	21.3	26.6	36.2
PB in case of applying the bottom bid price rate (70%) (C3= B3/A)	year	13.9	17.0	21.3	28.9