council resolut march ration energi build sector council european commun regard council resolut januari improv energi programm member state regard commiss commun novemb entitl quot european polici ration energi build sector quot import implic econom reason exploit energi save potenti build sector sector account half potenti energi save note commiss consult expert member state prepar work programm cover sector refer commun resolut take account experi gain member state welcom commiss initi design supplement effort undertaken member state promot ration energi build sector note framework programm commiss consult expert member state conduct detail assess pilot project relat upgrad energi effici exist build carri member state thermal audit order identifi compar method recommend deriv audit result obtain light conclus assess undertak pilot action commun interest refer commun examin question relat placard energi consumpt build process certif order improv flow inform parti concern state real estat market give credit effort made builder owner continu activ technic field view develop specif eurocod reaffirm import detail examin commun level definit standard method measur thermal perform build take account climat variat note wisdom detail studi wai mean improv thermal perform exist build renov emphas import regul forc member state improv energi perform build introduct reinforc regul stress continu research develop demonstr effort order foster develop technolog product invit commiss abreast progress made work programm report progress made area oj