Lower running costs (kWH/m)
(< 50) A
(51 To 90) B
(91 To 150) C
(151 To 230) D
(231 To 330) E
(331 To 450) F
( > 451) G
A
Lower CO2 emissions (kg/m)
(< 5) A
(6 To 10) B
(11 To 20) C
(21 To 35) D
(36 To 55) E
(56 To 80) F
( > 81) G
A
