Condensed air sounds either wonderfully pure or slightly alarming, depending on your instincts. The truth is that raw condensate is not drinkable, and everything depends on what happens after it.

What actually comes off the coil

Condensate starts out close to distilled — very low in dissolved minerals, because minerals do not evaporate into the air in the first place. That sounds ideal, and in one sense it is: no fluoride, no chlorine, no dissolved heavy metals from old municipal pipework, no agricultural runoff.

But the air itself is not clean, and the collection process is not sterile. Raw condensate can pick up:

• Airborne particulates — dust, pollen, soot and whatever else the intake air was carrying
• Bacteria and mould — a dark tank of standing water at room temperature is a hospitable place, which is exactly why UV treatment and regular sanitisation matter
• Dissolved gases and airborne pollutants — anything in local air can end up in the condensate, which is why placement matters
• Nothing beneficial — near-zero mineral content means it tastes flat, and long-term consumption of fully demineralised water is not recommended

So the honest framing is this: an atmospheric water generator is not a machine that makes clean water out of thin air. It is a machine that harvests raw water from the air and then cleans it, and the cleaning is the part that matters.

The purification chain, stage by stage

Our 20L unit runs an eight-stage chain and the 80L a six-stage one. The components in a typical chain do the following:

The combination matters more than the count. A "12-stage" machine with a weak membrane is worse than a well-designed six-stage one. Treat stage counts in marketing as a rough indicator, not a quality measure.

What SANS 241 actually is

SANS 241 is the South African National Standard for drinking water quality. It sets limits across microbiological safety, physical characteristics like turbidity and pH, and chemical determinands including metals and organics. It is the benchmark municipal supplies are measured against, and the right reference point for any drinking water device sold here.

Here is the important nuance: SANS 241 describes water, not machines. A machine cannot be "SANS 241 certified" in any meaningful sense. What can exist is a laboratory test report showing that water produced by a particular unit, under stated conditions, met the standard's limits. Those are different claims, and the difference is where a lot of marketing lives.

How to check a supplier's claim — including ours

If any supplier tells you their water meets SANS 241, ask for these. A legitimate supplier will have them or will tell you plainly what they do not have.

• A test report, not a claim. Ask which laboratory, on what date, on which model, and ask to see the document.
• Whether the lab is accredited. In South Africa look for SANAS accreditation; internationally, ISO/IEC 17025 accreditation under an ILAC-recognised body.
• Which determinands were tested. A report covering only microbiology is not the same as one covering the chemical and physical parameters too.
• Whether the tested unit is the unit being sold. Model numbers on the report should match the model in the quote.
• Electrical safety compliance. Separate from water quality, but any electrical appliance sold in South Africa in this category requires NRCS approval under the applicable compulsory specification. Ask about it.

The maintenance point nobody enjoys

Purification is not permanent. Filters exhaust, membranes foul, UV lamps lose intensity, and a tank left standing grows things. A machine with neglected filters can produce water measurably worse than the tap water it was bought to replace.

This is the least glamorous fact about these machines and the most important one. If you are not going to keep up with filter changes and periodic sanitisation, either arrange a maintenance plan or reconsider the purchase.

How the two modes compare on quality

Water generated from air and water drawn from your tap both run through the same purification chain, but they start from different places. Condensate starts nearly mineral-free with possible airborne contamination. Municipal tap water starts treated and chlorinated, with dissolved minerals and possible pipework contamination.

Both end up as clean, filtered, UV-treated drinking water. Atmospheric mode gives you independence from the municipal supply; purification mode gives you better efficiency and consistency. That is genuinely the main difference, and it is why having both is more useful than either alone.

A note on this article. Purification stage descriptions reflect the filtration chains specified for the units SkyTap supplies. SANS 241 is published by the South African Bureau of Standards. We sell atmospheric water generators, so read the verification checklist above as advice we expect you to apply to us too.

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