Dyson Purifier Cool Formaldehyde TP09 vs Levoit Core 400S Smart Air Purifier (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

Dyson Purifier Cool Formaldehyde TP09

9.2/10 Excellent

4.5★ (4,800 owners)

HEPA H13, formaldehyde destruction, 360° oscillation, cooling fan, app. The premium air purifier-fan.

Full Review

Levoit Core 400S Smart Air Purifier

9.2/10 Excellent

4.6★ (28,700 owners)

True HEPA H13 for rooms up to 40m². The best-value genuine air purifier available.

Full Review

At a Glance

	Dyson Purifier Cool Formaldehyde TP09	Levoit Core 400S Smart Air Purifier
247Verdict Score	9.2/10	9.2/10
Owner Rating	4.5★ (4,800)	4.6★ (28,700)
Verdict	Excellent	Excellent
Filter	HEPA H13 + formaldehyde	True HEPA H13
Coverage	10m projection	Up to 40m²
Warranty	2 years	2 years

Quick Verdict

This is a genuine draw — both score within 0.15 points of each other. Dyson Purifier Cool Formaldehyde TP09: HEPA H13, formaldehyde destruction, 360° oscillation, cooling fan, app. The premium air purifier-fan. Levoit Core 400S Smart Air Purifier: True HEPA H13 for rooms up to 40m². The best-value genuine air purifier available. Choose based on your specific needs. Check the current price on PuroAir →

Pros & Cons Side by Side

Dyson Purifier Cool Formaldehyde TP09

Solid-state formaldehyde sensor detects and destroys formaldehyde continuously — unique feature
HEPA H13 captures 99.97% of particles down to 0.1 microns
Projects purified air up to 10 metres via Air Multiplier technology
Works as a cooling fan simultaneously — dual function replaces separate devices
Dyson app shows real-time air quality data and auto-mode manages purification

£500+ for an air purifier requires justification — Levoit Core 400S delivers excellent HEPA purification at 20% of the price
Fan noise at higher speeds is noticeable for sleeping use
Large footprint for a single-room device

Levoit Core 400S Smart Air Purifier

True HEPA H13 captures 99.97% of particles 0.3 microns and above
CADR 260m³/h — independently tested, not just manufacturer claims
PM2.5 laser sensor triggers auto mode when air quality drops
VeSync app provides air quality history and scheduling
Relatively low filter running costs — ~£25-35/year vs Dyson's £70+

Purification only — no heating or cooling like Dyson HP09
Real-world coverage is 40m² — ignore the 'large room' marketing for anything bigger
Auto mode fan noise at maximum (52dB) is noticeable

FAQ

Which is better, Dyson Purifier Cool TP09 or Levoit Core 400S Smart Air?

Is the Dyson Purifier Cool TP09 worth the extra cost?

The Levoit Core 400S Smart Air Purifier matches or exceeds it at a potentially lower price point.

Who is the Dyson Purifier Cool TP09 best suited to?

HEPA H13, formaldehyde destruction, 360° oscillation, cooling fan, app. The premium air purifier-fan.

Who is the Levoit Core 400S Smart Air best suited to?

True HEPA H13 for rooms up to 40m². The best-value genuine air purifier available.

What are the main downsides of each?

Dyson Purifier Cool Formaldehyde TP09: £500+ for an air purifier requires justification — Levoit Core 400S delivers excellent HEPA purification at 20% of the price; Fan noise at higher speeds is noticeable for sleeping use. Levoit Core 400S Smart Air Purifier: Purification only — no heating or cooling like Dyson HP09; Real-world coverage is 40m² — ignore the 'large room' marketing for anything bigger.

Do owner ratings agree with our verdict?

Largely, yes — Dyson Purifier Cool Formaldehyde TP09 sits at 4.5★ from 4,800 verified Amazon owners, and Levoit Core 400S Smart Air Purifier at 4.6★ from 28,700.

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