I want to replace a 63cm X 60cm radiator in the bathroom with a towel radiator as a straight swap. It's an open vented CH system.
I thought it was just a question of turning off the inlet and outlet valves on the old radiator, removing it and replacing it with the new towel radiator.
I've come across instructions on the net which state you need to drain the system before replacing a radiator in an open vented system. However, there are also instructions on how to temporarily remove a radiator for decorating without having to drain the system
I'm puzzled - which is correct?