Fredxx wrote:
On 17/06/2020 12:48:21, wrote:
On Wednesday, 17 June 2020 04:45:08 UTC+1, RJH wrote:
On 16 Jun 2020 at 22:10:25 BST, tabbypurr wrote:
On Tuesday, 16 June 2020 19:55:22 UTC+1, Dave Liquorice wrote:
On Tue, 16 Jun 2020 09:53:42 -0700 (PDT), tabbypurr wrote:

I suspect fanned rads will make a comeback some day once people
realise
they can have a much smaller rad without all the fan noise of the old
ones.

s/fanned/finned/ ?

Not sure what that means, but they do tend to go together. A fan
with a flat
panel works for a diy job but is not optimal design costwise for a new
product.

All you need for a fanned rad to work, take up way less space and be
much
preferred is silence,

I can see how you get quiet for a reasonable amount

http://openecohomes.org/diy-fanned-radiator/

But silent?

and that's not a challenge.

For you, maybe :-)

If an engineer isn't able to design a silent fan they had better stay
out of that business.

Moving any volume of air around inherently creates noise. An engineer
would know this, otherwise they best stay out of that business.

In principle, the convection you're relying on now to distribute
the heat from the radiator, that's moving air, and it's pretty
quiet. Suggesting human hearing is not infinitely sensitive.

If you make the radiator large enough, you should be able to
match the fan-driven performance. With a large enough radiator,
the exhaust water temp will be the same as the room air temp.
That should be the limit.

Paul