I am both OFTEC and Gas Safe registered and qualified to work legally on oil and gas fired Ranges. Here are the industry recognised modules I have passed: 

Gas - Gas Safe                        

CCN1                                                             

CKR1                                                             

HTR1                                                             

CEN1                                                                        

LPG                                  

Energy Conservation                                                              

Range Cookers / Boilers

Forced Draught Burners

Unvented Hot Water Storage Systems

Oil - OFTEC                  

OFT 101

OFT 102

OFT105E

OFT600A 

click above

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