Blueair Blue Pure 511 review
Blueair Blue Pure 511 Air Purifier
By Tom Calder
The cheapest purifier on this list, and its 38 m² coverage suits a single small-to-medium room rather than anything bigger. Blueair replaced the older 411/411+ with this 511 model in the UK, so treat it as the current comparable rather than a downgrade.
- Best for
- A small bedroom or home office on the tightest budget
- Skip it if
- You need to cover a room larger than about 38 m²
as of 4 Nov 2026, 22:10 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.We earn a commission if you buy through the retailer links on this page. It doesn't change our verdict. How we make money →
Researched, not used. We haven't used this product. This review is built from the maker's specifications, owner reports and our own sizing.
What we like
- Lowest price on this list
- HEPASilent filter combines particle and carbon filtration in one stage
- Compact enough for a small bedroom or office
Worth knowing
- Smallest stated room coverage on this list at 38 m², so it won't suit an open-plan space
- Blueair's own noise figures aren't fully consistent across their own materials, so treat the dB rating as approximate
- CADR is a converted figure rather than a figure Blueair publishes directly in m³/h
ⓘ As an Amazon Associate, PreparedBritain earns from qualifying purchases. We may earn a commission when you buy, or a fee when you request a quote, through our links. When two products are close, commission can decide which one we pick. A clearly better product always wins. Amazon prices come from Amazon's own product data and show the date and time they were retrieved. Prices at other retailers are checked by us, less often. Prices and stock can change at any time, so always check the retailer's price before you buy.
Who shouldn't buy this
Don't buy it if you need to cover a room larger than about 38 m² — the Philips 2200 Series or Winix Zero-S are built for bigger spaces.
Key specs
| Room size | 38 m² |
| CADR | ~208 m³/h (converted from cfm, not Blueair-published) |
| Filter | HEPASilent combination particle and activated carbon filter |
| Noise (min) | 21 dB |
This is a Researched review: we haven't used this product. We check every specification against at least two independent sources, re-check the UK price on a schedule where we can track it automatically, and say plainly who it isn't for. Commissions never change a rating.
If this isn’t the one
Best for A large living room or open-plan space where filtering speed and a quiet night setting both matter.
as of 4 Nov 2026, 22:10 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for A small-to-medium bedroom or home office on a budget
as of 4 Nov 2026, 22:10 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.
Best for A large living room or open-plan space, bought direct from Levoit
as of 4 Nov 2026, 22:10 GMT · Details
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon.co.uk at the time of purchase will apply to the purchase of this product.Free alerts for your home
Home Alerts emails you when a power cut, a Met Office warning or a flood warning covers your postcode. Free for your own home. Sign up in a minute.
Start free →