I don't know enough about airconditioning, but Legionella pathogens thrive in (certain) large A/C systems, so I'd still be a bit careful about the condensate without further research.

Hi Eddy

Ignore these two idiots above my post - the water from that should be fine.

The heat exchangers in most aircons that I know are aluminium. While most people think aluminium is bad, in this state it is always coated in a thin, clear layer of aluminium oxide which is about as reactive and soluble as a diamond.

in order to meet FDA and NSF standards for water purity, many systems take advantage of one or more filtration techniques, including among many methods, UV light chambers, carbon filtration, and water recycling so that water in the holding chamber is re-filtered after sitting for a certain amount of time.

Except for the bit about 'in this state'
Aluminium is almost ALWAYS coated in oxide. Hence why it's hard to weld, and won't stay polished.
Aluminium oxide coats the aluminium as soon as oxygen touches it, and as chilidude mentioned, it's insoluble, hence why aluminium is said to not rust. The aluminium rust protects it from rusting.
It's not a coating added by manufacturers, unless it's anodised aluminium, which is done to thicken the coating for hardness.
Aluminium is fine, unless a raided or consumed, or dissolved in acid and consumed, or rubbed on the skin.