Choosing the right radiator

I am in the process of renovating a house and unfortunately some light fingered soul stole the radiators whilst they were draining outside overnight. All the radiators except one have been replaced. The problem with the remaining radiator is the sheer size required. How do you determine what size radiator you require (physical size not output). The valve heads are 2.6m apart and we are loath to move the pipework too much as the flooring is already in place. Any suggestions?

Thats one large rad, how old was it. Your problem being that matching the size may not be possible if the rad was old. It will also be extremely expensive. As it was stolen can you not claim on your insurance?

Consider a type of feature rad low and long It may not cost much different to a normal panel one that long Is it really that bad to take up the floor