On Saturday, 15 December 2012 18:03:48 UTC+1, The Medway Handyman wrote:
SWMBO wants the rad in the bathroom replaced with a heated towel rail.



I've noticed that white ones give out more BTU's than chrome. For a

1000 x 550 the white ts rated at 1493 and the chrome at 1119.



And curved ones give out slightly more than flat.



Why's that then?

Curved has a bit more surface area than flat.
If you really want your chromed towel rail to put out maximum heat, respray it mat black. It'll look ****in' 'orrible, but will be more efficient.