On 03/08/2020 23:21, Nick Odell wrote:
On Mon, 3 Aug 2020 11:19:40 -0700 (PDT), harry
wrote:

On Monday, 3 August 2020 17:50:53 UTC+1, Nick Odell wrote:
I am thinking about constructing a tube to suck hot air from near the
ceiling of a high-ceiling room and reintroduce it and mix it with the
colder air at floor level. I have seen these things at work in other
buildings but I do not know what they are called.

I would like to read a bit more about them and find out if any
improvements from mixing hot air into the cold are worth the effort
but I am stuck by not knowing a suitable search term.

Any suggestions. please?

Nick

Air recirculation.
It tends to arise in domestic air heating systems.

https://www.google.com/search?sxsrf=...=819 &bih=500

Thanks but that is a more sophisticated system than I have in mind.

The thing I am thinking of is nothing more than an open-ended vertical
tube mounted against a wall - one in a school where I used to work was
rectangular section and simply looked like a covering for pipes or
cables.

At one end of the tube is a fan - like a desktop computer fan - and it
sucks the hot air in at the top and blows it out at the bottom to even
out the temperature through the room.

Nick

Covid 19 distribution system?

--
"Anyone who believes that the laws of physics are mere social
conventions is invited to try transgressing those conventions from the
windows of my apartment. (I live on the twenty-first floor.) "

Alan Sokal