Specific energy consumption classes
ANNEX IISupplementary provisions
ANNEX II Specific energy consumption classes Specific energy consumption (SEC) classes of residential ventilation units calculated for average climate: Table 1 Classification from 1 January 2016 SEC class SEC in kWh/a.m 2 A+ (most efficient) SEC < – 42 A – 42 ≤ SEC < – 34 B – 34 ≤ SEC < – 26 C – 26 ≤ SEC < – 23 D – 23 ≤ SEC < – 20 E – 20 ≤ SEC < – 10 F – 10 ≤ SEC < 0 G (least efficient) 0 ≤ SEC