Levoit Core 300S Smart True HEPA Air Purifier review
A small-to-medium bedroom or home office on a budget
By Tom Calder · Updated 24 July 2026 · Price checked against our tracker
The most affordable proper HEPA purifier on this list, and quiet enough at 22 dB to run overnight. Its official room-size claims vary depending on which Levoit page you read, so size it to the lower, twice-an-hour figure for a room that actually needs clearing quickly.
Approximate typical UK street price as of Jul 2026, based on an Amazon.co.uk aggregator listing. Levoit's own UK store lists this model at £149.99 the same day — worth checking both before you buy.
ⓘ We may earn a commission when you buy through our links — it never affects what we recommend, and we buy everything we test.
- Cheapest True HEPA option here
- 22 dB Sleep Mode genuinely quiet for a bedroom
- Interchangeable filter variants for pet allergy, toxins or mould
- Levoit's own room-size figures for once- vs twice-hourly air changes aren't identical to Amazon's listed figure, so check which you're relying on
- Maximum-speed noise level isn't published, so you can't compare it directly to rivals at full power
Key specs
| Room size | 100 m² |
| CADR | 258 m³/h |
| Filter | 3-stage: pre-filter, True HEPA, activated carbon |
| Noise (min) | 22 dB |
Our rating is a considered spec-and-evidence verdict: we verify every specification against at least two independent sources, track the UK price daily, and say plainly who a product isn't for. Commissions never change a rating. Read the full methodology →
Alternatives to consider
Want this cheaper?
We track this price daily. Leave your email and we'll tell you when it drops — nothing else.