Here are the U-value requirements according to the the latest Greek law, called ΚΕΝΑΚ (Κανονισμός Ενεργειακής Αποδοτικότητας Κτιρίων) Greek State Journal B 407/2010 (9 April 2010)
According to the law there are four climate zonea (A, B, Γ, Δ). Maximum U-values for these zones are as follows
| U (W/m2K) | Zone Α | Ζone Β | Ζone Γ | Ζone Δ |
Walls
| 0,6 | 0,5 | 0,45 | 0,40 |
Roof
| 0,5 | 0,45 | 0,40 | 0,35 |
Floors / pilotis
| 0,5 | 0,45 | 0,4 | 0,35 |
