Let's repeat this for the newcomers:
Remember that you all (probably) already have a H2O generator at home.
Take a matchbox or some such to prevent your fridge door to fully close.
Defrost it every day and collect the melting condensed ice from it into
a suitable device.
In the summer this can provide you up to a litre distilled water a day.
The (bigger) automatic defrosting fridges do collect their waste water on
top of the compressor for evaporating by it's heat.
Just lead the tube to a bottle instead :-)
Regards, Wim.
----- wim@djo.wtm.tudelft.nl -----
(wim@morgana.nl)