Is there a reason why I shouldn't fit a TRV with the head pointing downwards rather than the more usual pointing upwards/sideways configuration?
I'm about to install a towel rail with pipes hidden in the wall. I think the neatest way to do this would be to fit standard right-angle valves between the pipes and the bottom of the radiator. This means either having the heads sticking outwards into the room (which I'm not that keen on) or pointing downwards.
Anyone got a good reason why I shouldn't do this?