Do all radiators have the top that can be taken off? Do Kudox rads come with removable tops?
K1 - single convector single panel - Type 11 (Alternative name)
K2 - single convector double panel - Type 21 (Alternative name)
P+ - double convector double panel - Type 22 (Alternative name)
I think this is correct
You have the K2 and P+ wrong way round,
K1 single panel with convector = type 11
P+ double panel single convector = type 21
K2 double panel double convector = type 22