Full side-by-side
AlkaViva H2 Athena Mfr claim
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Takashimaya (multi-brand) Mfr claim
| Spec | AlkaViva H2 Athena | Takashimaya (multi-brand) | Winner |
|---|---|---|---|
| Origin | USA (imported) | Japan department store | — |
| Distribution | Online · ships internationally | Department store retail | — |
| Category | Alkaline ionizer (US import) | Department store (multi-brand) | — |
| Plates | 5 | 0 | AlkaViva H2 Athena |
| pH (max alkaline) | 10.3 | None | AlkaViva H2 Athena |
| ORP | -650 mV | None mV | AlkaViva H2 Athena |
| Dissolved H₂ | 0.92 ppm | None ppm | AlkaViva H2 Athena |
| Flow rate | 2.4 L/min | None L/min | AlkaViva H2 Athena |
| Warranty | 5 yr | 1 yr | AlkaViva H2 Athena |
| Filter cost (each) | S$ 220 | S$ 150 | Takashimaya (multi-brand) |
| Sticker price | S$ 3,200 | S$ 1,000 | Takashimaya (multi-brand) |
| 5-year total | S$ 5,400 | S$ 2,500 | Takashimaya (multi-brand) |
| Our rating | — | — | — |
How we sourced these numbers: All specs are taken directly from each manufacturer's published product page (links at the bottom). We have NOT independently lab-tested these brands — only Prime Water (our own sister brand) is verifiable through primewater.com.sg. Independent lab testing is rolling out through 2026.
Verdict
Cost over 5 years: Takashimaya (multi-brand) saves S$ 2,900 over 5 years.
Lab performance: AlkaViva H2 Athena produces 0.92 ppm dissolved H₂; Takashimaya (multi-brand) produces None ppm. The AlkaViva H2 Athena leads on hydrogen output.
Warranty: AlkaViva H2 Athena carries a 5-year warranty; Takashimaya (multi-brand) carries 1. AlkaViva H2 Athena wins on coverage.
Where to buy + showroom info
AlkaViva H2 Athena
Online · ships internationally
Lineup: H2 Athena (5p) · Vesta H2 (8p) · Delphi H2 (7p)
Visit AlkaViva →Takashimaya (multi-brand)
Department store retail
Showroom: Ngee Ann City, 391 Orchard Road, Singapore 238872
Lineup: No own-label water ionizer · stocks Panasonic + other appliance brands on Kitchen floor
Visit Takashimaya Singapore →No affiliate links · Waterionizer.sg earns zero from either purchase.