Whole House vs. Under-Sink Carbon
Mam Nature Swiss vs. Carbonit
Carbonit is one of the most popular under-sink water filters in Germany, Austria, and Switzerland. This comparison examines a key question for DACH households: is an activated carbon under-sink filter enough, or does whole-house selective adsorption provide meaningfully better protection?
The key difference: PFAS evidence depth + coverage
Carbonit filters drinking water at one tap using activated carbon. Mam Nature Swiss filters all water in the home using selective adsorption — a technology that achieves laboratory-confirmed PFAS removal across the full spectrum, including short-chain variants that activated carbon cannot reliably capture.
Not a substitute for whole-house PFAS filtration.
Side-by-Side Comparison
| Criterion | Mam Nature Swiss | Carbonit (Under-Sink) |
|---|---|---|
| Coverage | ✓ Whole house (all taps + shower) Point-of-entry installation. Every litre entering the home is filtered. | – Single tap (under-sink) Installed under the kitchen sink. Only the connected cold-water tap receives filtered water. |
| PFAS removal | ✓ >96–>98.5% (ETH Zurich University) Full PFAS spectrum including short-chain variants (PFBS, PFHxA). Independently tested, laboratory confirmed. | – Limited / not certified for PFAS Activated carbon block has some affinity for long-chain PFAS but limited effectiveness against short-chain variants. No published independent PFAS spectrum certification. |
| Heavy metal removal | ✓ Up to 99.98% (ETH Zurich University) Lead, copper, arsenic, cadmium, chromium, aluminium — independently tested, laboratory confirmed. | – Partial (varies by model) Some Carbonit models reduce lead and copper. Arsenic and cadmium removal varies. Not all models are TÜV tested for heavy metals. |
| Chlorine / taste | = Effective Chlorine, taste, and odour compounds are removed as part of the filtration process. | = Effective Activated carbon is excellent for chlorine and taste improvement. This is Carbonit's primary strength. |
| Mineral retention | = Full retention Selective adsorption preserves calcium, magnesium, and potassium. | = Full retention Activated carbon does not strip minerals from water. |
| Flow rate | ✓ Up to 2,000 L/hr Full household flow with no pressure restriction. | – ~2–4 L/min Adequate for a single kitchen tap but cannot supply the full household. |
| Bathing water protection | ✓ Yes — all water in the home PFAS and chlorine absorbed through skin and inhaled in steam are addressed. | – None Under-sink filters treat drinking water only. Shower water is unfiltered. |
| Limescale treatment | ✓ Yes (Water LIME module) Salt-free physical limescale conversion available as optional add-on. | – None Carbonit does not offer limescale treatment. A separate device would be needed. |
| Filter lifespan | ✓ 1 year / 150,000 L Single annual cartridge change. Approximately 10 minutes to replace. | – ~6 months / 10,000 L Carbonit recommends replacement every 6 months or 10,000 litres, whichever comes first. |
| Construction | ✓ 316L stainless steel Swiss Made. 10-year warranty on housing. | – Mostly plastic housings Standard Carbonit models (Sanuno, Vario) use food-grade plastic filter housings. The Duo model uses stainless steel. |
| Installation | – 2–3 hours (plumber) Professional inline installation at the main supply. One-time setup. | ✓ DIY under-sink (~30 min) Self-install with basic tools. Connects to the cold-water line under the kitchen sink. |
| Upfront cost | – €1,090–€3,598 Essential to Complete Set Plus. Covers the entire household. | ✓ €120–€400 Sanuno (~€120), Vario (~€200), Duo (~€400). Single-tap coverage only. |
| Independent evidence & certifications | ✓ ETH Zurich University Filtration Report · Swiss Safety Center · ISO 13485 Third-party independent testing at world-class institution. Full performance data publicly available. | – TÜV tested (limited parameters) TÜV testing covers chlorine, taste, and some organic compounds. Not independently certified for full PFAS spectrum. |
Common Questions
Does Carbonit remove PFAS?
Carbonit's activated carbon block filters have some affinity for longer-chain PFAS compounds (PFOA, PFOS), but activated carbon has limited effectiveness against short-chain PFAS (PFBS, PFHxA, PFBA, GenX) — the compounds now increasingly found in European tap water as legacy long-chain PFAS are phased out. Carbonit has not published independent third-party PFAS spectrum removal data.
Is Carbonit or Mam Nature better for German/Swiss tap water?
Both are well-suited to the DACH region. For households primarily concerned with taste improvement at the kitchen tap, Carbonit is an affordable and effective option. For households wanting laboratory-confirmed PFAS and heavy metal removal across all water in the home — including shower and bathing water — Mam Nature Swiss provides measurably broader protection with independent ETH Zurich University laboratory confirmation.
Can I use Carbonit for my whole house?
No. Carbonit systems are designed for single-tap (point-of-use) installation. They do not have the flow capacity or housing design for whole-house point-of-entry installation. For whole-house filtration, a point-of-entry system like Mam Nature Swiss is required.
Which has lower long-term costs — Carbonit or Mam Nature?
For drinking water at one tap, Carbonit is significantly cheaper: ~€120–€400 upfront + ~€60–€120/year in cartridges. For whole-house coverage (all taps, showers, appliances), Mam Nature Swiss is more cost-effective: €1,090–€3,598 upfront + ~€240/year, but covering all water in the home at approximately €0.002–0.004 per litre.
Is activated carbon enough to remove PFAS from tap water?
Standard activated carbon (granular or block) can reduce some long-chain PFAS at moderate concentrations. However, it is not reliably effective against short-chain PFAS, which are the compounds now of greatest concern in European water supplies. Selective adsorption technology — such as the Mam Nature Swiss Fine Filter — achieves independently verified >96–>98.5% PFAS retention, including short-chain compounds, and heavy-metal retention up to 99.98%.
More comparisons
Laboratory-Confirmed PFAS Protection for Your Entire Home
The Mam Nature Essential Plus delivers ETH Zurich University laboratory confirmed filtration across every tap — with optional limescale protection. One cartridge per year.