parima võimaliku ehituspraktika kohane energiatõhusus- ja taastuvenergiatehnoloogiate lahendustega ratsionaalselt ehitatud hoone, mille energiatõhususarv on suurem kui 0 kWh/(m2 a), kuid korterelamute puhul mitte suurem kui 100 kWh/(m2.a), building that has a very high energy performance, as determined in accordance with Annex I. The nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby