Hi Jasen,

     About "Air conditioning" of July 17:

MS> I was thinking i should drill a four inches hole in the ceiling and
MS> try to pump that heat in the attic.  ...but i never seen...
JB> ...fairly common in Australia, Another trick is sticking vents...

     I live in a flat-top building now so this attic isn't really like i
used to conceive attics before;  in our ancestral house, when i lived on
the country side, the attic was huge and there was some tiny passage-way
like a tunel on each side, below the roof:  this one had venting indeed!

MS> Perhaps it's sealed for a purpose, something about condensation...
MS> If there's no such issue i suppose people would prefer to keep their
MS> windows clear and use attics to dump heat from the air-conditioner
MS> instead but it's possible it gets too hot over there...
JB> ...it's not a good place to source cooling air...

     Certainly not for sourcing cool air but to expurge warm air, maybe?

     Take the vortex-based system where the differential temperature can
be allowed to reach over a hundred degrees Celcius, i believe...  Intake
air gets separated into a dry cold and a damp hot exhaust;  if source is
a combination of inside and outside air i imagine it must be possible to
balance things out.  Perhaps it wouldn't be efficient but yet effective?

     Now, with that much differential margin, it might just as well make
sense to use the attic for both supply and exhaust...  An heat exchanger
could use the cold air to make that in the house somewhat more bearable;
and why not, thermoelectric devices could do the work, euh...  no sweat!

     But of course, that's no longer comparable to using a window fan!!!

MS> I read a bit about thermoelectric, thermoacoustic and magnetic
MS> refrigeration besides simple portable home air conditioners then...
JB> I saw advertising for a heat-pump driven water heater.  It looked
JB> interesting but it wastes the cold air it makes.

     People will be creative at times, heating the pool while a house is
cooled sounds like an interesting solution but then if there's a pool in
the backyard why try to stay inside, after all?!  :)  I see it a bit the
same way about heat pumps;  i understand it's for the sake of discussion
but a guy who uses that sort of resource must have begun with isolation!

                                  ;-)

     That heater could as well use its own separate heat pump and be fed
with pre-heated water comming via networks of tubes located on the roof.

                                   :>
     
MS> The one that impressed me the most was the Ecofan Stovetop Fan since
MS> it used no external source of energy but heat...  ...discontinued...
JB> A chimney works that way too.

     Yeah, i see your point:  the one here worked on that same principle
(and it's also discontinued)...  %-b,  Still, i'd have liked my chimney.

                                                           Salutations,

                                                           Michel Samson
                                                           a/s Bicephale


... Sometimes, the cost of new features is too high, really!  Is it not?
--- MultiMail/XT v0.42 - Support DOS+TCP/IP+TelNet+ZMoDem/Kermit+.QWK!!!