AO Smith Z9 Green RO
AO Smith
- RO + SCMT
- 9 litres tank
- Up to 3000 ppm TDS
Premium kitchens, high-TDS or brackish supply, and households that drink a lot of tea and coffee.
View detailsBrand: Aquaguard
Copper plus alkaline in Aquaguard's premium domestic unit
Our editorial score
Very good — recommended
Premium buyers who want copper and alkaline options in one well-built unit.
The Aura is Aquaguard's answer to the wellness-feature arms race, and it executes it better than most: the copper and alkaline stages are both switchable, so you are not locked into either. Underneath, the purification is the same reliable 2,000 ppm RO+UV+UF stack as the Delight NXT, with a slightly larger tank and faster throughput.
The honest question is whether copper and alkaline are worth ₹7,500 over the Delight NXT. Copper has genuine antimicrobial properties, which is why Indian households have stored water in copper vessels for centuries — but in a purifier that has already sterilised the water with UV, the marginal benefit is small. Alkaline, as covered elsewhere on this site, has no solid clinical support. Buy the Aura because you want the better-built unit with more options, not because you expect a health transformation.
Every condition below is derived from this product's published specifications and from how it compares with the water purifiers we track — so you can check each one against your own room, supply or budget rather than take our word for it.
Your supply runs above 2,000 ppm TDS
The membrane is rated to 2,000 ppm. Feed it more and it will not fail dramatically — it will die early and quietly, and you will be buying membranes annually. Check your worst-season reading, not your average one.
Purifiers for high-TDS supply →Water wastage matters to you
The brand does not publish a recovery figure, so there is no way to know how many litres go to drain per litre purified. Only 2 of the 26 water purifiers we track publish this at all.
High-recovery purifiers →Low running cost is a priority
Consumables and routine service run about ₹5,200 a year, which is in the most expensive quarter of the water purifiers we track. Over five years that puts total ownership near ₹51,490.
Sort the database by five-year cost →Fair transparency. This is separate from our review score above — it measures how well documented, how supportable and how expensive to own this water purifier is, scored on 6 of 7 axes by formula, with no manual override. See the methodology.
| Axis | Score | Weight | Based on |
|---|---|---|---|
| Documentation | 7.5 | 15% | 9 of 12 tracked specs published |
| Running cost | 4.7 | 20% | ₹5,200 per year |
| 5-year cost of ownership | 1.0 | 20% | ₹51,490 over five years |
| Warranty & free service | 0.0 | 12% | 12 months warranty |
| Service & parts reach | 10.0 | 15% | Aquaguard service network rated excellent |
| Energy efficiency | 9.2 | 8% | 45 W |
| Water recovery | Not scored | 10% | Not published |
| Purification | RO + UV e-boiling + UF + MTDS + Active Copper + Alkaline |
|---|---|
| Storage capacity | 7 litres |
| Purification capacity | 15 litres/hour |
| Max input TDS | 2000 ppm |
| Output pH | Alkaline boost, approximately 8.5+ |
| Power | 45 W |
| Warranty | 1 year comprehensive |
| Mounting | Wall-mount |
Specifications are from manufacturer literature and were checked at the last price-verification date. Brands occasionally revise stage counts, tank sizes and warranty terms without changing the model name — confirm against the current listing before purchasing.
India's oldest water purification brand and still the service benchmark — Eureka Forbes' direct technician network is the deepest in the category. The current Delight NXT / Aura / Ritzy line-up leans on mineral guard technology, active copper and e-boiling claims, with better industrial design than KENT.
Tip
AO Smith
Premium kitchens, high-TDS or brackish supply, and households that drink a lot of tea and coffee.
View details
KENT
Families on borewell, tanker or high-TDS municipal supply who want the safest all-round choice.
View detailsLG
Hygiene-focused buyers, humid coastal cities, and anyone who has ever opened a purifier tank and been unpleasantly surprised.
View detailsAquaguard
Buyers who value service reliability and compact design over maximum tank capacity.
View detailsFree consultation · Pan-India
Tell us your city, your water source and your budget. For homes we will recommend the right technology — including telling you when a ₹3,000 purifier is genuinely enough. For offices, societies and factories, our team will size a system against your water report and send a specification-backed quotation.
Or email betterworkindia@gmail.com — attach a water analysis report and we can quote faster.
Homes
Right-sized recommendation for your TDS, not the most expensive unit
Offices & societies
25 LPH to 2,000+ LPH, sized on headcount and feed water
Industry
Pharma, food, textile, boiler feed — engineered to your specification
Service & AMC
Installation, repair and AMC with written response times