Energy efficiency should be viewed as a whole, without any exclusions, while the best method of savings calculation is to calculate on the basis of a limited cumulative primary energy consumption.
Energetsko učinkovitost je treba obravnavati celostno in brez izjem, najboljši način za izračun prihrankov energije pa je ocenjevanje na podlagi omejevanja porabe kumulativne primarne energije.