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Air purifiers
The best air purifier for every budget in 2026
126 models ranked by the maker’s own specs and owner ratings, with today’s prices from 4 shops that deliver to Germany.
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| Bosch Air 4000 × | |
|---|---|
| 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 | 195 €EURONICS |
| Our own score out of 10: 60% measured facts and 40% shop ratings. Price does not count. Score | |
| 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 | ★ 4.6 · 7 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. When it matters
When it matters less
Source
| 300 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. When it matters
When it matters less
Source
| 25 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
| H13 HEPA |
| The sound level at the lowest speed, as the maker measures it. When it matters
When it matters less
Source
| 25 dB |
| The sound level at the highest speed, as the maker measures it. When it matters
When it matters less
Source
| 49 dB |
| Rank | |
| Where the model stands in our ranking, among the purifiers for the same size of room. Rank | rank 3 of 23 for large rooms |
| Smart features and warranty | |
| Which voice assistants the robot works with, such as Google Assistant or Alexa. When it matters
When it matters less
Source
| none (assumed) |
| 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) |
| 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
| none (assumed) |
| 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 |
| The room size the maker states. Makers use different rules, so we show it but never rank on it. Source
| 63 m² |
| 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 |
| 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 |
| How many filters the purifier holds, each a part to replace. Source
| 1 |
| 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 |
| The maker says the housing is sealed, so the air cannot slip past the filter through gaps around it. When it matters
When it matters less
Source
| no (assumed) |
| How the purifier tells you the filter is due. A timer counts the hours it has run, a sensor judges the filter itself, an estimate weighs the hours against the air it cleaned, and a plain indicator is one the maker does not explain. When it matters
When it matters less
Source
| Timer |
| Noise and power | |
| The power the purifier draws at its highest speed. Source
| 26 W |
| 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 |
| How many speeds you can choose by hand, the automatic mode not counted. When it matters
When it matters less
Source
| 3 |
| Air quality sensing | |
| 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 |
| What the unit itself shows of the air it measures: a figure, such as the PM2.5 level, or only a coloured light. When it matters
When it matters less
Source
| Figure |
| The fan speed follows the air quality the sensor reads. When it matters
When it matters less
Source
| 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
| Sleep |
| A sensor that dims the lights and display when the room goes dark. When it matters
When it matters less
Source
| no (assumed) |
| Build | |
| Locks the buttons, so a child or a pet cannot change the settings or switch it off. When it matters
When it matters less
Source
| yes |
| How tall the purifier is. It decides whether it fits on a shelf or under a window sill. When it matters
When it matters less
Source
| 50 cm |
| How wide the purifier is. With its depth it decides how much floor it takes up. When it matters
When it matters less
Source
| 291 mm |
| How deep the purifier is, front to back. Source
| 291 mm |
| What the purifier weighs. It counts most if you move it from room to room. When it matters
When it matters less
Source
| 4 kg |
| 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 (assumed) |
| What the purifier does beside its filter: UV-C light, photocatalytic oxidation, plasma, a bipolar ion generator or electrostatic plates. Some of these can make ozone or other by-products, and none replaces a good filter. When it matters
When it matters less
Source
| None (assumed) |
| Whether the purifier is said to make no ozone. UL 2998 is an independent test that it gives off next to none, a maker's claim is the maker's word alone. When it matters
When it matters less
Source
| None (assumed) |
| Warranty and certification | |
| Maker model numbers | 7733701943 |
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.
Pick the models you want to compare. Up to 10.
Only models rated at least 1 star from at least 20 reviews at the shops that report customer ratings. Models with fewer reviews or without a rating fall outside this filter.
Lowest price at every shop that delivers to Germany, VAT and delivery included. * = delivery cost and VAT estimated for a foreign shop.
Air purifier market report, October 2026 +0.4% at the same shops, a median price of 211 € and 0 new models.
Frequently asked questions
How big an air purifier do I need?
Match it to the size of the room. Each model in the ranking is grouped by the room size its maker states, and the lists keep a model out when it states none. A common rule of thumb is a clean air delivery rate (CADR) in m³/h of at least 12 times the room’s floor area in m², for a ceiling of 2.4 metres.
What is the difference between HEPA H13 and True HEPA?
Both are high-efficiency filters. True HEPA is the American name for a filter that catches 99.97% of particles of 0.3 micrometres, and H13 is the European class for 99.95%. We read the class the maker states and do not treat a filter called HEPA-type or HEPA-like as either.
Can an air purifier make ozone?
Some can, mostly models with an ioniser or a plasma feature. California limits ozone from indoor air cleaners to 50 parts per billion, and the CARB certification shows a model meets that limit. Our asthma filter leaves out models whose ioniser cannot be switched off.
Whose tests we use
Beside each model we also show where these testers place it in their own lists, without counting it in the score:
How we combine measured facts and owners’ ratings into one score is on the method page.
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