Condensing driers are much more energy efficient. Instead of blowing
hot air outside they reuse it round and round, just extracting the
water content. They dont blow heat out at all.


The question is, how do they extract the water? I heard tell that some
use copious amounts of cold water so although your heat-energy argument
could hold in that instance, surely the water-conservation argument is
lost? Presumably (since it's in a bedroom) Suz's drier doesn't do this,
so how does it work?

Just curious...

Hwyl!

quote -

In "combo washer/dryers" (i.e. machines that can BOTH wash and dry the
clothes), the ventless condenser system is also widely used, but in these
cases the condensers are water-cooled. During a dry cycle, several gallons
of cold water is used to condense the moisture evaporated from the clothes,
which again is pumped away through the drain line. Most of the "combos"
currently available in North America use this method - i.e. units from
Equator, Splendide, Malber, Haier, Quietline, Thor, LG, and Eurotech. Note
that unlike the air-cooled design, these models do NOT significantly heat
the indoor air in one's laundry room - but on the other hand, the fact that
they use extra water during the dry cycle must be taken into consideration,
especially for anyone on a very limited (or expensive) water supply.

Answers both those points