10 Home Air Purifiers: Which Model Fits Your Room?

Choose an air purifier by the room it will serve, its clean-air delivery rate, noise and filter—not just by the biggest number on the box. We selected ten models with published manufacturer information and arranged them from compact options to higher-CADR units. This is a reference shortlist, not a lab test or a claim that one model is best for every home.

How we selected and ordered the models

We included models with official Bulgarian manufacturer product or specification pages and a published CADR. The order follows approximate capacity and typical use: compact rooms, medium rooms and larger shared spaces. Within each group, the practical reason for considering a model is stated, such as footprint, quiet mode, sensors, connectivity or filter design.

We did not test the devices. CADR describes airflow for particle removal; it is not a general score for gases and odours. Manufacturers do not calculate suggested room areas in one common way: Philips specifies NRCC-54013, Xiaomi gives an effective coverage range under its method, while Bosch publishes its own product figures. We therefore do not treat the square-metre claims as directly comparable or guaranteed for every room.

One useful check is to divide the stated CADR in m³/h by the room volume in m³. The result is the theoretical air changes per hour at that rated output. For example, 300 m³/h in a 20 m² room with a 2.5 m ceiling equals about six nominal air changes per hour. A quiet or lower-speed setting delivers less air, and placement, open doors and connected spaces also change the result.

For a compact room, office or bedroom

1. Bosch Air 2000 — for a small room and easy repositioning

Bosch lists a CADR of 180 m³/h and rooms up to 37.5 m². The manufacturer highlights its compact body, which can also sit on a table. It is a sensible starting point for one separate room when portability matters more than an app or maximum airflow. Do not treat the listed area as a promise for an open-plan space: check the room volume and the mode you will actually use. Bosch Air 2000 specifications (https://www.bosch-homecomfort.com/bg/bg/ocs/%D0%B6%D0%B8%D0%BB%D0%B8%D1%89%D0%B5%D0%BD-%D1%81%D0%B5%D0%BA%D1%82%D0%BE%D1%80/air-2000-19773130-p/).

2. Xiaomi Smart Air Purifier 4 Compact — the lightest to move between rooms

At 2.2 kg, this is one of the most compact models in the list. Xiaomi publishes a CADR of 230 m³/h and effective coverage of 16–27 m². It may suit a small bedroom, nursery or home office if you want a unit that is easy to move. Check that the stated area matches your room rather than a hallway or an entire open floor. Xiaomi 4 Compact specifications (https://www.mi.com/bg/product/xiaomi-smart-air-purifier-4-compact/specs/).

3. Philips PureProtect Mini 900 AC0920/10 — when sleep-mode noise matters

Philips lists a CADR of 250 m³/h, up to 65 m² under its method, and 20.5 dB in sleep mode. The last figure is most useful for a bedroom; it does not describe noise at maximum airflow. Before buying, check the compatible replacement filter and its availability from the retailer. The 65 m² claim uses Philips’ NRCC-54013 method and is not directly comparable with Xiaomi’s effective coverage range. Philips AC0920/10 (https://www.philips.bg/c-p/AC0920_10/pureprotect-mini-900-series).

For everyday use in a medium-sized room

4. Philips 1000i AC1715/10 — a balanced option with an app

Its CADR is 300 m³/h, and the system combines a HEPA filter with activated carbon. The model connects to the Air+ app. That is useful if you want phone-based control and filtration for particles plus some odours. Philips lists rooms up to 78 m² under its method; use the room volume as well, rather than relying only on that maximum area. Philips 1000i AC1715/10 specifications (https://www.philips.bg/c-p/AC1715_10/1000i-series-air-purifier-for-medium-rooms).

5. Bosch Air 4000 — for a quiet mode and a replaceable multi-layer filter

Bosch lists a CADR of 300 m³/h and up to 62.5 m². Its three-layer filter combines a pre-filter, activated carbon and HEPA13; the manufacturer lists 25 dB in quiet mode. These features make the Air 4000 worth considering for a medium-sized room where the purifier may also run in the evening. Quiet mode and maximum CADR are different operating modes—you should not expect peak airflow at the lowest noise level. Bosch Air 4000 official page (https://www.bosch-homecomfort.com/bg/bg/ocs/%D0%B6%D0%B8%D0%BB%D0%B8%D1%89%D0%B5%D0%BD-%D1%81%D0%B5%D0%BA%D1%82%D0%BE%D1%80/air-4000-19622322-p/).

6. Xiaomi Smart Air Purifier 4 Lite — for a medium room needing more airflow

Xiaomi publishes a CADR of 360 m³/h, effective coverage of 25–43 m² and maximum noise of up to 61 dB(A). It sits between compact purifiers and higher-capacity options starting around 500 m³/h. If you plan to use it in a bedroom, compare noise in the mode you will actually run rather than relying only on the maximum value in the specification. Xiaomi 4 Lite specifications (https://www.mi.com/bg/product/xiaomi-smart-air-purifier-4-lite/specs/).

For a larger room or higher airflow

7. Xiaomi Smart Air Purifier 4 Pro — for a larger living room

The CADR reaches 500 m³/h, effective coverage is 35–60 m² and maximum noise is up to 65 dB(A). It is the larger-room option in Xiaomi’s 4 series. Xiaomi lists separate, larger maximum room areas using another calculation; here we use only the effective range in the specifications. For an open kitchen and living room, count the whole connected area. Xiaomi 4 Pro specifications (https://www.mi.com/bg/product/xiaomi-smart-air-purifier-4-pro/specs/).

8. Rowenta Pure Home PU8080F0 — high airflow with a 360° intake

Rowenta publishes a CADR of 515 m³/h and says the unit refreshes the air in a 20 m² room in six minutes. It uses a 360° system. This may fit a larger room if you have space for a floor-standing unit and can leave the airflow path clear around it. Check the exact replacement-filter configuration and price before buying; we do not infer either from CADR. Rowenta Pure Home official page (https://www.rowenta.bg/%D0%94%D0%BE%D0%BC%D0%B0%D1%88%D0%B5%D0%BD-%D0%BA%D0%BE%D0%BC%D1%84%D0%BE%D1%80%D1%82/%D0%9F%D1%80%D0%B5%D1%87%D0%B8%D1%81%D1%82%D0%B2%D0%B0%D1%82%D0%B5%D0%BB%D0%B8-%D0%BD%D0%B0-%D0%B2%D1%8A%D0%B7%D0%B4%D1%83%D1%85/Rowenta-Pure-Home-Air-Purifier/p/7211004314).

9. Philips PureProtect 3200 AC3220/10 — high CADR with an emphasis on quiet operation

Philips publishes a CADR of 520 m³/h and coverage up to 135 m² under NRCC-54013. The filter combines HEPA and activated carbon. The manufacturer states sound pressure as low as 15 dB(A); when comparing, check whether the figure applies to the lowest setting, since higher airflow usually means more noise in practice. Do not treat 135 m² as a promise of the same result in every room. Philips PureProtect 3200 AC3220/10 (https://www.philips.bg/c-p/AC3220_10/pureprotect-3200-series).

10. Bosch Air 6000 — the highest listed CADR in this shortlist

Bosch lists a CADR of 600 m³/h and rooms up to 125 m². Sensors monitor particles, temperature and humidity. This is the highest published figure in this selection and may matter for a large room, but it does not automatically make the unit the best choice: it may be oversized for a small room, while noise and power at maximum speed still matter. Check the current filter for the exact model. Bosch Air 6000 official page (https://www.bosch-homecomfort.com/bg/bg/ocs/%D0%B6%D0%B8%D0%BB%D0%B8%D1%89%D0%B5%D0%BD-%D1%81%D0%B5%D0%BA%D1%82%D0%BE%D1%80/air-6000-19622323-p/).

How to make your choice

1. Measure the room and ceiling height. For an open plan, include the space the purifier will actually serve. 2. Compare particle CADR and work out the nominal air changes against the room volume. CADR is for particles; for odours or gases, look for activated carbon or another medium designed for gases. 3. Check the exact replacement-filter model, the manufacturer's replacement interval and whether you can obtain it. 4. Compare noise in the setting you plan to use. A night-mode figure is not the same as noise at maximum speed. 5. Place the unit so that a wall, curtain or piece of furniture does not block its air intake or outlet.

The US EPA notes that air cleaners do not remove every pollutant; filtration supplements source control and ventilation when outdoor conditions are suitable. EPA guide to home air cleaners (https://www.epa.gov/indoor-air-quality-iaq/guide-air-cleaners-home).

If your main concern is smoke and PM2.5, see our guide to CADR and room size (https://home.10bg.com/articles/hepa-air-purifier-smoke-room-size.html). It covers sizing in more detail without treating different manufacturers’ methods as interchangeable.