Levoit vs Blueair Air Purifier UK 2026: Which Brand Should You Buy?

Levoit vs Blueair is one of the most common comparisons shoppers face when buying an air purifier in the UK. Both brands sit at the top of Amazon’s bestseller charts, both make legitimately good machines, and both are regularly recommended by independent reviewers. But they take quite different approaches — and depending on your priorities, one will suit you significantly better than the other.

This guide cuts through the brand marketing and compares what actually matters: filtration technology, noise levels, room coverage, smart features, filter running costs, and value for money. We focus on the models available in the UK that we already recommend on this site — the Levoit Core 300S, Core 300, and Core 400S on the Levoit side, and the Blueair Blue Pure 211+ on the Blueair side.

The Brands at a Glance

Levoit

Levoit is a California-based brand founded in 2017 under parent company Arovast Corporation. Despite being a relative newcomer, it has become one of the bestselling air purifier brands on Amazon globally. Its appeal is straightforward: modern cylindrical designs, smart features (Wi-Fi, app control, voice assistant compatibility), and competitive prices. Levoit uses True HEPA filtration across its range — independently tested and AHAM verified on most models.

Blueair

Blueair is a Swedish brand founded in 1999, now owned by Unilever. It has a longer heritage and a reputation for Scandinavian minimalist design. Its key technology is HEPASilent — a proprietary dual filtration system that combines mechanical filtration with electrostatic precipitation. This allows its fans to move more air with less noise than a standard HEPA motor, which is Blueair’s main competitive advantage. The trade-off is the built-in ioniser, which cannot be disabled on older models like the Blue Pure 211+.

Filtration Technology: HEPA vs HEPASilent

This is the most important difference between the two brands.

Levoit uses standard True HEPA (H13) filtration — a mechanical filter that physically traps 99.97% of airborne particles down to 0.3 microns. No ioniser, no ozone, no controversy. The three-stage system (pre-filter, HEPA, activated carbon) is the industry standard and what most allergy and asthma charities recommend.

Blueair uses HEPASilent technology — a dual system combining mechanical filtration with electrostatic precipitation. Particles are given an electrical charge which makes them stick to the filter more easily. This lets Blueair use a looser filter medium and a quieter, more efficient fan. The result is excellent performance at lower noise levels and lower energy draw. Blueair claims 99.97% filtration efficiency down to 0.1 microns — finer than standard HEPA.

The catch: HEPASilent involves a built-in ioniser. On the Blue Pure 211+, this cannot be switched off. The ioniser produces a very small amount of ozone — Blueair’s units are CARB certified (California’s strict air quality standard), meaning emissions are well below safety thresholds. However, if you or a family member has a respiratory condition or you simply prefer to avoid ionisers entirely, a Levoit is the safer choice. The newer Blueair 211i Max addresses this by allowing the ioniser to be disabled — but that model is not currently in the UK affiliate programme on this site.

Noise Levels

Blueair’s headline advantage is noise. Because HEPASilent allows a looser filter medium, the fan does not need to work as hard to push air through — resulting in quieter operation at equivalent airflow compared to a standard HEPA unit.

Model	Low / Sleep Mode	Max Speed	Notes
Levoit Core 300S	~24 dB	~48–65 dB	Near-silent on sleep; louder on max
Levoit Core 300	~24–25 dB	~50–65 dB	Very similar to 300S
Levoit Core 400S	~24 dB	~52–60 dB	QuietKEAP tech; excellent for size
Blueair Blue Pure 211+	~35–36 dB	~60 dB	Quieter on mid speeds; no sleep mode button

In practice, the Levoit models win on paper at their lowest speed, reaching as low as 24 dB in sleep mode — essentially inaudible. The Blueair 211+ does not have a dedicated sleep mode button; its lowest speed runs at around 35–36 dB. However, the Blueair’s HEPASilent fan produces a smoother, more consistent white noise at mid speeds, which many users find easier to sleep through than the numbers suggest. Tom’s Guide measured the Blueair 211+ Auto at 35.6 dB on low — very quiet for a machine covering rooms up to ~50 m².

Room Coverage and CADR

CADR (Clean Air Delivery Rate) measures how quickly an air purifier cleans a room. Higher is better, and you should match the CADR to your room size — not just the manufacturer’s headline coverage figure.

Model	CADR (approx.)	Recommended Room Size	Best Use Case
Levoit Core 300 / 300S	~141 m³/h	Up to ~20 m²	Small bedrooms, home offices
Levoit Core 400S	~442 m³/h	Up to ~37 m²	Larger bedrooms, living rooms
Blueair Blue Pure 211+	~595 m³/h (350 CFM)	Up to ~50 m²	Large living rooms, open-plan spaces

The Blueair 211+ has a significant CADR advantage. With around 350 CFM (roughly 595 m³/h), it cleans large rooms much faster than any of the Levoit Core models. In independent testing, it brought a 150 sq ft room from 10,000 to 1,000 particles per cubic foot in just 8 minutes. For large UK living rooms or open-plan spaces, this is a meaningful edge.

For bedrooms under 20 m², the Levoit Core 300S or 300 is more than sufficient and much cheaper to run. For rooms between 20–37 m², the Levoit Core 400S is competitive. Above that, the Blueair 211+ takes over.

Smart Features and App Control

This is where Levoit pulls clearly ahead.

• Levoit Core 300S and Core 400S: Wi-Fi connected, VeSync app (iOS & Android), Alexa and Google Assistant compatible, real-time PM2.5 monitoring, auto mode, scheduling, remote control.
• Levoit Core 300: No Wi-Fi. Manual controls only — but simple and reliable.
• Blueair Blue Pure 211+: No Wi-Fi, no app, no auto mode on the original model. Three fan speeds and a power button. The 211+ Auto version adds a basic auto mode via a dust sensor, but still no app.

If smart home integration matters to you — or if you want your air purifier to automatically adjust based on real-time air quality — choose a Levoit Core S-series model. The Blueair 211+ is a plug-in-and-forget machine, which suits some households perfectly, but it cannot be controlled remotely or scheduled.

Design

Both brands are well regarded for aesthetics, but they take different approaches.

Levoit’s cylindrical Core series has a clean, modern look that blends easily into most rooms. The 360° intake means placement is flexible — it doesn’t need to face a particular direction. The LED ring on the 300S and 400S gives an at-a-glance air quality reading. Displays can be switched off entirely in a dark bedroom.

Blueair’s Blue Pure 211+ has a distinctive Scandinavian look — a tall cylindrical unit with a fabric pre-filter that comes in a choice of colours. It’s arguably the more stylish of the two and looks at home in a modern living room. The fabric pre-filter can be washed, which is a practical bonus.

Running Costs: Filters and Energy

This is often overlooked but adds up significantly over time. Approximate annual costs at typical UK electricity rates (34p/kWh, running 8 hours/day):

Model	Filter Cost (approx.)	Filter Lifespan	Energy Use (max)	Annual Filter + Energy Est.
Levoit Core 300 / 300S	£15–25	6–12 months	~22W	~£30–45/yr
Levoit Core 400S	£30–40	6–12 months	~38W	~£45–60/yr
Blueair Blue Pure 211+	£45–65	6 months	~30W	~£75–100/yr

Levoit’s filters are considerably cheaper than Blueair’s, and the Core 300/300S is one of the most affordable machines to run long-term. The Blueair 211+ filter replacement cost is the main ongoing expense — and at roughly 6-month intervals, it adds up. Factor this into your decision if you plan to run the unit continuously.

Levoit vs Blueair: Head-to-Head Summary

Category	Levoit Core Series	Blueair Blue Pure 211+
Filtration	True HEPA H13 — no ioniser, no ozone	HEPASilent — ioniser built in (cannot disable on 211+)
Noise (sleep/low)	~24 dB — near-silent	~35–36 dB — very quiet but no dedicated sleep mode
CADR / Room Size	Good for up to ~37 m² (400S)	Excellent — covers up to ~50 m²
Smart Features	Wi-Fi, app, Alexa/Google (S models)	None on 211+ — no app, no remote
Filter Costs	Low — £15–40/yr	Higher — £45–65 per filter, every 6 months
Price (unit)	Lower — £70–£150	Mid-range — £120–£170
Design	Cylindrical, LED display, flexible placement	Fabric pre-filter, bold Scandinavian look
Best For	Bedrooms, smart homes, allergy sufferers, budget-conscious buyers	Large rooms, noise-sensitive users, design-led homes

Which Should You Buy?

Choose Levoit if…

• You want zero ioniser / zero ozone — important for asthma, allergy, or chemically sensitive households.
• Smart features matter — app control, scheduling, auto mode, Alexa/Google.
• You’re furnishing a bedroom or smaller room (under 37 m²).
• You want to keep ongoing filter costs as low as possible.
• You’re on a tighter budget for the initial purchase.

Choose Blueair if…

• You need to cover a large room or open-plan space (above 37 m²).
• Noise on mid-speeds matters more than the lowest-speed figure — HEPASilent is genuinely smooth.
• You want a simple plug-and-run machine with no app to configure.
• Design is a priority — Blueair’s aesthetic is hard to beat.
• You’re comfortable with the higher ongoing filter cost.

Buy the Right Model for Your Home

Levoit Core 300S — Best for Small Bedrooms

Smart app, 24 dB sleep mode, H13 HEPA. Ideal for rooms up to 20 m².

👉 Check price on Amazon UK

Levoit Core 300 — Best Budget Levoit

No app, but excellent HEPA filtration and near-silent on sleep mode. Great value.

👉 Check price on Amazon UK

Levoit Core 400S — Best Levoit for Larger Rooms

Smart app, laser sensor, QuietKEAP motor. Covers up to 37 m².

👉 Check price on Amazon UK

Blueair Blue Pure 211+ — Best for Large Rooms

High CADR, HEPASilent, washable fabric pre-filter. Covers large living rooms up to ~50 m².

👉 Check price on Amazon UK

Frequently Asked Questions

Is Levoit or Blueair better for allergies?

Both remove allergens effectively. For allergy or asthma sufferers who want to avoid ionisers entirely, Levoit is the safer choice — its True HEPA filtration produces no ozone. Blueair’s HEPASilent does involve a low-level ioniser, though its ozone output is CARB certified as safe.

Is Blueair HEPASilent as good as True HEPA?

In practice, yes — and in some ways better. Independent tests consistently show Blueair 211+ bringing particulate levels to near zero in tested rooms. The electrostatic component allows it to capture particles down to 0.1 microns, finer than the 0.3-micron standard HEPA threshold. The performance difference in real-world use is negligible for most households.

Which is cheaper to run — Levoit or Blueair?

Levoit is significantly cheaper to run. The Core 300/300S filter costs around £15–25 and lasts up to 12 months. The Blueair 211+ filter costs around £45–65 and needs replacing every 6 months. Over a year, this is a meaningful cost difference.

Does the Blueair Blue Pure 211+ have a sleep mode?

The original 211+ does not have a dedicated sleep mode button. The 211+ Auto version adds an auto mode via a particle sensor, but neither has the kind of dimmed-display, whisper-quiet sleep mode found on Levoit’s S-series. For bedroom use, the Levoit Core 300S or 400S has the edge.

Can I control a Blueair air purifier from my phone?

Not the Blue Pure 211+. Blueair’s app-enabled models are the newer 211i Max and 311i Max — neither is currently in the UK affiliate programme on this site. If app control matters, choose a Levoit Core S-series model.

Related Guides

Not sure whether you need an air purifier or a dehumidifier? Read: Dehumidifier vs Air Purifier UK.

Dealing with mould as well as poor air quality? Start here: Best Dehumidifier for Mould UK.

For guidance on indoor air quality and respiratory health, see Asthma + Lung UK.