AC Condensate Irrigation

Air conditioning units cool air below its dew point, which condenses moisture out of it as a by-product; a typical villa AC unit can produce a meaningful volume of water this way over a day, especially during humid months. That water is essentially distilled: unlike tap or borewell water, it carries almost none of the dissolved minerals that contribute to soil salinity over time.

That makes it a genuinely useful supplementary water source for salt-sensitive plants, particularly potted specimens where mineral build-up shows up fastest. It should be collected fresh and used promptly rather than left standing, since a warm, still container of water, especially anywhere near outdoor heat, can grow bacteria or algae within days.

In practice this usually means running a hose or pipe from the unit's drain line to a covered container placed in shade, and using the collected water within a day or two rather than stockpiling it. It's a supplement to a plant's regular watering, not a full substitute, since condensate volume varies with humidity and AC runtime and can't be relied on as a sole water source.