The best-value countertop RO if certification isn't a requirement
DREO — best known for fans and space heaters — has entered countertop RO and done it right at the price point. The $169.99 entry price undercuts AquaTru by $279, and the 1K+ monthly sales and Amazon Overall Pick badge confirm this isn't just cheap — buyers are actually choosing it. The TDS display, autofill pitcher, self-cleaning, and 3:1 ratio are features that should cost more. The honest limitation: no third-party NSF contaminant-removal certification. If verifiable certified performance is your priority, AquaTru is worth the premium. If you want capable RO filtration at an accessible price, DREO is the current best answer.
- $169.99 — lowest price for real countertop RO
- Amazon Overall Pick + 1K+ monthly sales
- TDS display — see water quality in real time
- Autofill pitcher included
- 3:1 pure-to-drain — above average efficiency
- Self-cleaning function
- Filter life reminders
- No installation required
What we like
- No NSF/ANSI contaminant removal certification
- No UV sterilization
- 3L capacity — frequent refills for large households
- Newer brand in water filtration
What to know
Specs at a Glance
| Price | $169.99 |
| Tank capacity | 3L |
| Pure-to-drain ratio | 3:1 (3 gal filtered per 1 gal waste) |
| TDS display | Yes — real-time monitoring |
| Autofill pitcher | Yes — included |
| Self-cleaning | Yes |
| UV sterilization | No |
| NSF certification | None listed |
| Installation | No plumbing required |
| Amazon rating | 4.5 stars (311 reviews) · Overall Pick |
DREO in water filtration
DREO built their reputation on fans, space heaters, and air purifiers — appliances where they compete on smart features and value pricing. The countertop RO is a newer category for them, and the Amazon sales data suggests the brand's appliance track record is carrying over: 1K+ units per month at $169.99 is meaningful volume in a product category where competitors charge $300–$450.
The question for a water filtration buyer isn't whether DREO makes well-designed appliances — they clearly do — but whether their RO membrane delivers the contaminant reduction the category requires. The TDS display is the honest answer here: use it. A TDS reading before and after filtration tells you whether the membrane is working regardless of brand.
What the feature set delivers
TDS display
The standout feature at this price. The TDS monitor shows dissolved solids in your filtered water in real time — and more importantly, shows when performance is declining. A rising TDS reading after filtration means the membrane needs attention. Most countertop RO systems don't include this at $300+. At $169.99 it's a meaningful value.
3:1 pure-to-drain ratio
For every 1 gallon of wastewater the DREO produces, it delivers 3 gallons of filtered water — 75% efficiency. Most entry-level countertop RO produces 1 gallon purified per 3–4 gallons of waste. The 3:1 ratio is genuinely above average.
Autofill pitcher + self-cleaning
The included pitcher fills automatically. The 3L tank fills in roughly 15–20 minutes. The self-cleaning cycle flushes the membrane periodically to prevent fouling — maintenance you'd otherwise have to do manually.
How it compares
| Feature | DREO ($169) | Aigerri ($249) | AquaTru ($449) |
|---|---|---|---|
| Price | $169.99 | $249.98 | $449 |
| NSF certification | None | 372 only* | 42/53/58/401 |
| TDS display | Yes | No | No |
| UV sterilization | No | Yes | No |
| Autofill pitcher | Yes | No | Yes |
| Self-cleaning | Yes | Yes | No |
| Monthly sales | 1,000+ | 500+ | — |
| Best for | Budget + monitoring | Budget + UV | Max certifications |
*NSF/ANSI 372 certifies lead-free materials only — not contaminant removal. See our Aigerri review for full explanation.
Who should buy the DREO
Buy the DREO if: budget is your primary constraint and you want real RO filtration. The TDS display gives independent verification that the system is working. At $169.99 with autofill pitcher included, this is the strongest value in countertop RO today.
Consider AquaTru instead if: NSF certification is a firm requirement. AquaTru holds NSF/ANSI 42, 53, 58, and 401 — independently verified contaminant removal. See our AquaTru Classic review.
Consider the Aigerri instead if: you want UV sterilization for bacterial protection. The Aigerri adds UV at $249.98 — $80 more than the DREO.
Check Price on Amazon — $169.99 →