I would like to replace a tatty small radiator in a small bathroom with a funky heated towel rail, but am not sure what I need to know before I go and buy one and ask someone to fit it. I am worried that it may generate less heat than my radiator - so make the bathroom chilly. I know they tell you the output of the rail, but I don't know the output for the current radiator. Also, what extra bits do I need in the way of valves and connecting bits. Would it be safer to get a plumber in before I buy? In one shop the valves on the adjacent shelf were almost as expensive as the rail - can't I use the valves from the radiator?

yeah lorna....that is definitely not a do-it-yourself project....get yaself a good plumber before you buy anything

There is a noticable difference between a towel warmer and a room warmer. Consider the differece between an apple......... and a tree full of apples.
Towel warmers are not designed to warm/heat and entire bathroom. They are designed to provide very local heat to a towel.
To think otherwise... could be dangerous.
Best Wishes !

NOt dangerous, but uncomfortable. And if you use the valves from the radiator, your towel rack will look even tackier.