Comparing 3 robot vacuums
Your shortlist side by side: today’s price, our score and every fact the maker states.
Green is the best of these 3, also when they share the lead.
Drag a model by its header to move its column, or use the arrows.
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|---|---|---|---|
| Most important facts | |||
| The lowest price today at a shop that delivers to you, delivery included. A price with an asterisk comes from a shop abroad, and its delivery cost is our own estimate. Lowest price | 484 €Saturn | 277 €Saturn best | 399 €Saturn |
| Our own score out of 10: 60% measured facts and 40% shop ratings. Price does not count. Score | not in our ranking | best | |
| The average of the stars buyers give at the shops, with the number of reviews behind it. We only compare it from 20 reviews. Customer rating | – | ★ 4.5 · 56 reviews | – |
| How much clean air the purifier delivers an hour, measured with smoke, dust and pollen. A higher figure cleans a bigger room or the same room faster. In this comparisonWhen it matters
When it matters less
Source
| 676 m³/h best | 520 m³/h | 601 m³/h |
| The room size where the purifier changes the air 4.8 times an hour under a 2.5 m ceiling, worked out from its CADR. We use it so every model is compared on the same rule. In this comparisonWhen it matters
When it matters less
Source
| 56 m² best | 43 m² | 50 m² |
| How fine the filter is. True HEPA and H13 catch at least 99.97% of particles at 0.3 microns. HEPA-type is a weaker claim with no test behind it. When it matters
When it matters less
Source
| – | Not stated | True HEPA |
| How long the maker says a filter lasts, in months of normal use. A filter that is spent cleans less. In this comparisonWhen it matters
When it matters less
Source
| 12 months | 12 months | 12 months |
| The sound level at the lowest speed, as the maker measures it. In this comparisonWhen it matters
When it matters less
Source
| 19 dB | 15 dB | 24 dB |
| The sound level at the highest speed, as the maker measures it. In this comparisonWhen it matters
When it matters less
Source
| 63 dB | 48 dB | 56 dB |
| Rank | |||
| Where the model stands in our ranking, among the purifiers for the same size of room. Rank | – | rank 8 of 15 for open-plan spaces | rank 1 of 15 for open-plan spaces |
| Running cost | |||
| What the filters cost over a year, at the lowest shop price for each filter today and the filter life the maker states. It moves with the shop prices. Filters a year lower is better | – | 66 € a year | – |
| Smart features and warranty | |||
| Whether you can control the purifier from a phone app, over wifi or only nearby over Bluetooth. When it matters
When it matters less
Source
| Wi-Fi | Wi-Fi | Wi-Fi |
| Which voice assistants the robot works with, such as Google Assistant or Alexa. When it matters
When it matters less
Source
| – | Alexa, Google Assistant | Alexa, Google Assistant |
| Matter is the standard that lets devices from different makers work together. With it you can run the robot outside the maker’s own app. When it matters
When it matters less
Source
| – | no (assumed) | no (assumed) |
| Whether the purifier works with Home Assistant, the home automation software you run yourself. Official means the integration comes with Home Assistant itself, community that volunteers maintain it. When it matters
When it matters less
Source
| – | – | official integration |
| Cleaning performance | |||
| The test the CADR comes from. AHAM AC-1 and the DOE test are independent and comparable. A maker's own test is not. Source
| Not stated | GB/T 18801 (Chinese standard) | AHAM AC-1 (US standard) |
| The room size the maker states. Makers use different rules, so we show it but never rank on it. In this comparisonSource
| 70 m² | 135 m² | 51 m² |
| The clean air delivery rate for the finest particles (PM1) at top speed, measured by HouseFresh in its own test room on the US model. It is HouseFresh’s measurement, not ours, and it does not count in our score. In this comparisonSource
| – | 423 m³/h | 637 m³/h |
| The clean air delivery rate for the finest particles (PM1) at the fastest speed that stays below 45 dB, the level for a bedroom at night, measured by HouseFresh on the US model. It does not count in our score. In this comparisonSource
| – | 287 m³/h | 348 m³/h |
| The CADR measured with tobacco smoke, the finest of the three test particles. It is the figure to read for wildfire smoke. When it matters
When it matters less
Source
| – | – | 601 m³/h |
| The CADR measured with dust. Source
| – | – | 634 m³/h |
| The CADR measured with pollen. When it matters
When it matters less
Source
| – | – | 732 m³/h |
| The CADR measured for particles under 2.5 microns. Source
| – | – | 617 m³/h |
| How many times an hour the maker assumes the air is changed when it states a room size. Source
| – | – | 4.8 per hour |
| Filter | |||
| Whether the particle and carbon layers are one filter or separate ones. Separate filters let you replace only the part that is spent. When it matters
When it matters less
Source
| One combined filter | One combined filter | One combined filter |
| A filter of activated carbon that takes out smells and some gases. It does not catch particles. When it matters
When it matters less
Source
| yes | yes | yes |
| How many filters the purifier holds, each a part to replace. In this comparisonSource
| 1 | 2 | 1 |
| Replacement filter part number | 8741 100 | FY3200 | – |
| A coarse mesh in front of the main filter that catches hair and fluff. A separate washable one is rinsed under the tap, which keeps the expensive filter from clogging early. When it matters
When it matters less
Source
| Part of the main filter | Part of the main filter | – |
| The purifier reads a chip or code in the filter and works only with the maker's own, so a cheaper filter from another brand will not do. When it matters
When it matters less
Source
| yes | – | – |
| How much activated carbon the filter holds by weight, as the maker or a test states it. More carbon takes up smells and gases for longer, where a thin coated layer fills up within weeks. In this comparisonWhen it matters
When it matters less
Source
| – | 100 g | 400 g |
| Running costs | |||
| How long the carbon filter lasts before it needs replacing, as its maker states it. Where it is a separate part, it is bought on its own schedule. When it matters
When it matters less
Source
| – | 12 months | – |
| Noise and power | |||
| The power the purifier draws at its highest speed. In this comparisonSource
| 175 W | 36 W | 70 W |
| How many speeds you can choose by hand, the automatic mode not counted. When it matters
When it matters less
Source
| 5 | – | – |
| The sound at the lowest speed, measured by HouseFresh with a sound meter on the US model. It is HouseFresh’s measurement and does not count in our score. In this comparisonSource
| – | 35 dB | 39 dB |
| The sound at the highest speed, measured by HouseFresh with a sound meter on the US model. It is HouseFresh’s measurement and does not count in our score. In this comparisonSource
| – | 53 dB | 58 dB |
| What the purifier draws when it is switched off but still plugged in, or waiting for the app. When it matters
When it matters less
Source
| – | 2 W | – |
| Air quality sensing | |||
| The fan speed follows the air quality the sensor reads. When it matters
When it matters less
Source
| yes | yes | yes |
| The settings the maker names besides plain fan speeds, such as a quiet sleep mode or a timer. When it matters
When it matters less
Source
| Timer | Sleep | – |
| A sensor that dims the lights and display when the room goes dark. When it matters
When it matters less
Source
| yes | – | – |
| What the purifier measures in the air. A particle sensor lets it speed up and slow down by itself. When it matters
When it matters less
Source
| – | PM2.5 | PM1, PM2.5, PM10 |
| How the purifier measures fine dust. A laser sensor reads smaller particles and lower levels more precisely than an infrared one. When it matters
When it matters less
Source
| – | – | Laser |
| Build | |||
| How tall the purifier is. It decides whether it fits on a shelf or under a window sill. In this comparisonWhen it matters
When it matters less
Source
| 66.8 cm | 52 cm | – |
| How wide the purifier is. With its depth it decides how much floor it takes up. In this comparisonWhen it matters
When it matters less
Source
| 468 mm | 285 mm | – |
| How deep the purifier is, front to back. In this comparisonSource
| 275 mm | 285 mm | – |
| What the purifier weighs. It counts most if you move it from room to room. In this comparisonWhen it matters
When it matters less
Source
| 15 kg | 6.2 kg | 9.38 kg |
| The purifier’s shape: a small tabletop unit, a tall tower, a box that stands on the floor or a unit mounted on the wall. When it matters
When it matters less
Source
| – | Floor box | – |
| Extras | |||
| An ioniser charges particles so they stick to walls and furniture instead of the filter, and some come loose again later. Some also make ozone, which irritates the airways and can turn scents in the room into formaldehyde. That is why a switch to turn it off matters. When it matters
When it matters less
Source
| – | None | None |
| Certified by the California Air Resources Board as making little ozone. Source
| – | – | yes |
| Warranty and certification | |||
| The warranty the maker gives in Germany. Consumer law here stands apart from it and can last longer. In this comparisonWhen it matters
When it matters less
Source
| 2 years | 2 years | 2 years |
| Maker model numbers | 87510011 | AC3220/10; AC3221/13 | LAP-EL551S-AUS, LAP-EL551S-AUSR, LAP-EL551S-WUSB |
| The CADR is verified by AHAM, the US trade body that runs the test. Source
| – | – | yes |
Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.