▁all ▁coun tr ymen . ▁ ▁United ▁Kingdom ▁The ▁United ▁Kingdom ▁( UK ) ▁is ▁one ▁of ▁the ▁countries ▁where ▁H ERS ▁has ▁been ▁developed ▁and ▁implemented ▁strongly ▁from ▁a ▁very ▁long ▁time ▁ago . ▁In ▁UK , ▁Currently ▁National ▁Home ▁Energy ▁R ating ▁( N HER ) ▁scheme ▁is ▁used ▁widely . ▁N HER ▁scheme ▁measure ▁the ▁thermal ▁efficiency ▁of ▁the ▁dwell ings ▁on ▁a ▁scale ▁of ▁ 0 - 1 0 ▁in ▁terms ▁of ▁energy ▁running ▁cost . ▁The ▁dwell ing ▁rating ▁is ▁done ▁through ▁computer ▁model ing ▁which ▁uses ▁a ▁computer ▁program ▁based ▁on ▁Building ▁Research ▁Est ab lish ment ▁Dom estic ▁Energy ▁Model ▁( B RE DE M ). ▁Basically ▁N HER ▁measure ▁the ▁energy ▁efficiency ▁of ▁dwell ings ▁as ▁a ▁function ▁of ▁energy ▁cost ▁per ▁square ▁meter . ▁The ▁energy ▁usage ▁is ▁calculated ▁by ▁considering ▁the ▁all ▁aspects ▁of ▁buildings ▁( location , ▁design , ▁construction , ▁water ▁he ating , ▁cook ing , ▁vent ilation ▁and ▁app li ances , ▁light ing ▁etc .) ▁and ▁for ▁dwell ing ▁energy ▁rating ▁it ▁use ▁some ▁standard ▁assumptions , ▁such ▁as ▁occup ancy ▁scenario , ▁therm ost at ▁setting , ▁occup ant ▁stay ▁tim ings . ▁ ▁United ▁States ▁In ▁the ▁US , ▁H ERS ▁are ▁since ▁ 1 9 8 0 s . ▁ ▁Among ▁the ▁various ▁H ERS ▁energy ▁r ated ▁homes ▁of ▁America ▁is ▁used ▁widely . ▁ ▁It ▁is ▁used ▁in ▁more ▁than ▁ 1 8 ▁states ▁of ▁US . ▁ ▁This ▁scheme ▁uses ▁a ▁