In article .com,
wrote:
Yes, evaporative coolers do work, but nothing like as well as ac. They
are very cheap to make, very cheap to run, can knock 4-6C off a room,
but next to nothing in damp weather, need a bit of ventilation to avoid
causing damp, and can be made yourself from a fan + a wet towel. No
point paying for one.

We have some large ones at work - they wheel them from set to set.
Somewhat larger than a free standing gas cooker.

They work ok, but of course the vent pipe needs to go to the outside.
Which is always too far away. So they cool the bit of set in use and roast
everyone else. ;-)

They do seem reliable though. Other parts of the building with 'proper' AC
as individual two part devices seem to have them not working as often as
working.

--
*There are 3 kinds of people: those who can count & those who can't.

Dave Plowman London SW
To e-mail, change noise into sound.