Are designer, column type radiators bi-directional?

[Jock Spanners]

Evening all,
A customer has shown me some designer, flat column type radiators she wants me to fit. On the bottom they are marked 'in' and 'out' which I assume means flow and return. Does anyone know if it makes any difference which way the flow and return is connected? I don't imagine it does but can't understand why else they're labelled as they are.
Thanks,
Jock

 

[ShaunCorbs]

Yes it does have to be as labelled as there’s baffles/ diverter

 

[Jock Spanners]

Yes it does have to be as labelled as there’s baffles/ diverter

Cheers Shaun,
Of course it's a concrete floor and the pipes are the wrong way round!

 

[Scott_D]

Can you turn them or are the brackets fixed?

 

[IND_Nick]

They can be a real pain, are you able to swap them over somewhere else, say floor above or near boiler? Obviously only an option if they're all wrong.