Vicvapour we'll stick to gas while you stick to electrics , only problem being 99% of you clowns don't know how to wire an S ,Y , W , U , V , X or Z , so bearing that in mind I'll wire my own systems thank you very much.
GW, you forgot C plan +
Oh well, must mean your not competent either.
I know a lot of sparks and theres precious few who can wire a heating system with out sh ittin it first. Most wiring centers I see on existing systems dont employ a choc strip of 1-10, some muppet in my town circa 1980-1990 something insisted on stuffing everything into a deep SM back box.
One gang at that
VERY very sparks know how a heating system works so how they can puff their chest out and say 'we know better than you' i will never know