Cast iron radiators come in a variety of sizes, shapes and designs. Most we reclaim from schools, hospitals and public buildings as well as domestic properties. We always insist that the radiators were working prior to removal. Output and technical information is very difficult for us to assess and always advise that you consult with your plumber as to the suitability of the radiators. Some consideration should also be made to the soundness of floors and logistics of installing them also, as they can be very heavy and come as something of a shock to the uninitiated!