Boilers with a SEDBUK Band Rating of C 
Have an efficiency value of between eighty-two and eighty-six percent (82%-86%).
If you have a Standard (non-condensing) GAS Boiler already installed & would like to check it’s SEDBUK SAP rating – please view the complete, full boiler list on the SEDBUK Band C (efficiency rating between 82%-86%) Boiler Ratings Page!  
For your convenience…
All Regular non-condensing boilers are listed in alphabetical order on the SEDBUK Band C page..!!