<font color=blue>I'm no expert but I used to use water from mine for the batteries and never had any problems. I suppose someone is going to come up now and tell me how stupid I was and how lucky I was to only get away with 8-10 years from them.
It is ideal for batteries (& cheap!). Also useful if you have indirect water cooling engine. Mix it with correct amount of antifreeze (Usually 50/50) and use it in cooling system. It helps to prevent lime-scale in engine. I always use it as here we have very heavy lime content in water.
all the yuckies in the air passing thru the evaporator stick to the fins and then are washed off with the condensate !! urggh, you drink it?
and dont forget legionnaires disease likes A/C water lying around (and before some smarty pants goes on about cooling water, i do know how it works) in the bottom of A/C systems before it goes thru the drain pipe.
The air is filtered with a half inch thick closed cell foam panel which I rinse out every couple of days.The evaporator tray is all of one inch deep so no water is sitting there. Normally, the condensate is syphoned out with the cooling water but that seemed such a waste. Put in a glass it's as clear as a bell and tastes a lot better than the local tap water. I'll take my chances with "bugs" 'cos as my old Mum used to say " you will eat a lot of dirt before you die"