Brondell Circle RC100 vs iSpring RCD100
Only the Brondell Circle RC100 is certified to reduce lead, chlorine, fluoride and arsenic and 5 more. Verdict: the Brondell Circle RC100 for broader certified protection (9 vs 0 of the contaminants we track); the iSpring RCD100 if running cost matters more. Replacement filters and water for 2 people cost about $214 a year on the Brondell Circle RC100 and $118 on the iSpring RCD100; they cost $450 and $420 to buy.
| Brondell Circle RC100 | iSpring RCD100 | |
|---|---|---|
| Type | Under-sink reverse osmosis | Countertop reverse osmosis |
| Price | $450 | $420 |
| Filters + water a year (2 people) | $214 | $118 |
| Filter cost per gallon (rated life) | — | — |
| Gallons per day | 40 | 100 |
| Pure to drain | 0.5:1 | 2.5:1 |
| Installation | diy | none |
| PFAS | — | Brand test only |
| Lead | Certified | Brand test only |
| Chlorine | Certified | Brand test only |
| Fluoride | Certified | Brand test only |
| Arsenic | Certified | — |
| Nitrate | — | Brand test only |
| Chromium 6 | Certified | — |
| Cysts | Certified | — |
| VOCs | Certified | — |
| TDS | Certified | Brand test only |
| Copper | Certified | — |