I have just finished my NVQ 3 in Heating and ventilation. The new course now includes gas. Cenwat CCn1 etc. As was said the first year is design and controls etc of systems and the second year was gas.
TBH I wasn't really interested in the Gas side but it goes hand in hand now. With regards to your OP yes the level 3 is worth doing for the extra knowledge. There is an electrical qual as well as unvented and water regs which is handy to have.
We have gas engineers who 'walked into training centres' and cannot even grasp basic plumbing or heating tasks!!
TBH I wasn't really interested in the Gas side but it goes hand in hand now. With regards to your OP yes the level 3 is worth doing for the extra knowledge. There is an electrical qual as well as unvented and water regs which is handy to have.
We have gas engineers who 'walked into training centres' and cannot even grasp basic plumbing or heating tasks!!