▁reports ▁on ▁water ▁consumption , ▁energy ▁consumption ▁and ▁G H G s ▁emission ▁per ▁year , ▁which ▁are ▁compared ▁against ▁a ▁standard ▁building ▁of ▁same ▁type ▁on ▁a ▁scale ▁r anging ▁from ▁A 1 - C 5 . ▁ ▁Second ▁part ▁of ▁the ▁system , ▁propos es ▁the ▁different ▁possible ▁ways ▁for ▁saving ▁of ▁energy ▁and ▁water ▁consumption ▁with ▁respect ▁to ▁the ▁cost ▁involved ▁ ▁This ▁part ▁of ▁report ▁provides ▁the ▁present ▁state ▁of ▁buildings ▁in ▁term ▁of ▁size , ▁he ating ▁system , ▁energy ▁usage ▁and ▁the ▁cost ▁of ▁energy ▁and ▁he ating . ▁ ▁France ▁In ▁France , ▁" Di agnostic ▁de ▁performance ▁ener get ique " ▁( D PE ) ▁is ▁used ▁as ▁H ERS . ▁This ▁scheme ▁was ▁developed ▁in ▁November ▁ 2 0 0 6 ▁and ▁in ▁July ▁ 2 0 0 7 ▁its ▁use ▁becomes ▁mand atory ▁for ▁all ▁those ▁buildings ▁whose ▁registration ▁had ▁been ▁file d ▁after ▁ 1 ▁July ▁ 2 0 0 7 . ▁This ▁rating ▁scheme ▁consist ▁of ▁two ▁types ▁of ▁measurements . ▁ ▁Energy ▁consumption ▁▁ ▁Green house ▁gas ▁emission ▁Both ▁of ▁the ▁measurements ▁compr ises ▁ 7 - label ▁ratings , ▁r anging ▁from ▁A ▁( best ) ▁to ▁G ▁( wor st ) ▁which ▁are ▁presented ▁by ▁the ▁color ▁coding . ▁In ▁ratings , ▁the ▁green ▁color ▁represents ▁A ▁and ▁red ▁color ▁represents ▁G ▁label . ▁In ▁both ▁cases ▁of ▁measurements , ▁the ▁buildings ▁are ▁evaluated ▁in ▁terms ▁of ▁necessary ▁resource ▁for ▁he ating , ▁hot ▁water ▁production ▁and ▁air