Energy Efficiency Rating   Environmental Impact CO2 Rating
 
  Current Potential     Current Potential
Very energy efficient - lower running costs       Very environmentally friendly - lower CO2 emissions    
(92-100) A     N/A     N/A     (92-100) A     N/A     N/A  
             
(81-91) B     N/A     N/A     (81-91) B     N/A     N/A  
             
(69-80) C     N/A     N/A     (69-80) C     N/A     N/A  
             
(55-68) D     N/A     N/A     (55-68) D     N/A     N/A  
             
(39-54) E     N/A     N/A     (39-54) E     N/A     N/A  
             
(21-38) F     N/A     N/A     (21-38) F     N/A     N/A  
             
(1-20) G     N/A     N/A     (1-20) G     N/A     N/A  
             
Not energy efficient - high running costs       Not environmentally friendly - high CO2 emissions    
England & Wales EU Directive   England & Wales EU Directive
2002/91/EC 2002/91/EC