On 28/08/2019 19:48, Martin Brown wrote:
On 28/08/2019 17:59, John wrote:
If I change a conventional (horizontal) radiator for a tall vertical
one of
the same BTU / Wattage, will there be any differences in the heating
effect?

Most of the heat input will be delivered directly to a thin band of very
hot air close to the ceiling which will eventually fill the room.


Well they do actually radiate some heat too. More so if they are
'modern' and black.

To look effective they need to be installed with hidden pipework,
so replacing an existing rad is not straightforward.