On Thu, 23 Jun 2005 15:12:26 +0100, JPG wrote:

On Thu, 23 Jun 2005 14:39:59 +0100, "Gavin Staples"
wrote:

http://www.eng.uwaterloo.ca/~gmilburn/ac/

OK if you have a large supply of ice and are happy to have a dustbin in your
bedroom.

Don't waste money on evaporative coolers that use a stream of air across water.
This will cool the air but raise the humidity to produce an unpleasant
clamminess and actually seem IMHO, to make you feel more uncomfortable.

Make use of nature's own air conditioning system and just ensure you have moving
air across your body, I have found this system to be highly efficient. A shower
before going to bed helps to remove that sweaty, sticky feeling.

I bought a small (5500 BTU) inexpensive portable A/C (not evaporative)
a few years ago and have it in the dining part of my lounge-diner. The
outlet vanes can direct the airflow in various directions and air is
expelled at around 16 deg C when outside temperatures are around 27
like today. It vents into a handy airbrick aperture in my dining room
wall and obviously, I keep all the room windows and doors shut.

It was designed to cool a small room like my dining room alone, and
not the lounge-diner; nevertheless, by running it 24 hours a day, it
keeps the room temperature between 2 and 3 degrees C cooler than the
outside afternoon temperature and relative humidity is always 45% or
less. I have a large fan as well but wouldn't be without the A/C now.
I solve the bedroom problem by having a North facing room , opening
all upstairs windows in mid evening, going to bed late then shutting
all windows until mid-day. The large (quiet) fan is an option if
things are still too hot in the bedroom.

I think you may need a 9000 BTU unit in London, to make what works
here work there.

--
Dave
Fareham