Blue Pure 221 Refurbished

The Blue Pure 221 gives the greatest clean air delivery rate for the price of any purifier we recommend. Ordinarily recommended for areas up to 50 m2, it meets our top Covid Standard of 10 air changes an hour in spaces up to 25m2. ONE ONLY

3 Year Guarantee Included

£ 169.00 
£ 349.00 
Contact us to discuss and for more details

Employing Blueair's HEPASilent technology, the Pure 221 is exceptionally quiet, straightforward to operate (one button control) and includes a combination filter that will also remove polluting gases and odours. Probably the best value, budget professional purifier.

The entire bottom half of Blue consists of an advanced air filter. It has the largest filter area of any mobile room air purifier – with millions of ultra-thin fibers of different sizes in different layers. The result: a longer-lasting filter with higher airflow and lower sound levels.

Technical Specifications

Room size: 50 m2 (540 sq ft), based on 8' ceiling to achieve 5 Air Changes an Hour

                   25 m2 to achieve our 'Covid Standard' of 10 ACH.

Clean Air Delivery Rates:

CADR (Smoke)

590 m3 per hour (350 cfm)

CADR (Dust)

590 m3 per hour (350 cfm)

CADR (Pollen)

590 m3 per hour (350 cfm)

Dimensions (H x W x D)516 x 330 x 330 mm (20.3 x 13 x 13 in)

Product weight7 kg (15.4 lb)             Energy consumption30 - 61 watts

Sound level31 - 56 dB(A)                  Filter replacement indicator:Yes

Speed control options1 - 2 - 3         Air outlet: Top      Air inlet: 360° lower half

How to Fix MobileAir to your vehicleMobileAir Filter Technology
Managing Airflow
Download MobileAir Manual
Filter Replacement Service

Fixing the MobileAir in your Vehicle

MobileAir is supplied with two sets of Velcro™ hook & loop strips.

We recommend that you fix the two hook strips – the fluffier ones – to the base of the MobileAir, near the end edge of the unit. If installing the unit under one of the front seats onto the carpet this will suffice to hold the unit in place during normal operation and allow for easy removal or replacement when preferred. The hooks will grip the carpet.

If installing the MobileAir in the boot of a hatchback, 4x4 or estate, you may prefer to fix it to the side of the boot compartment. To do so, fix the loop strips to the side of the vehicle in the desired location. Press down firmly on the strips and leave for a few hours before attaching the MobileAir to ensure a good bond. Apply the same process for other, un-carpeted installation areas.

As you may wish to move the MobileAir from time-to-time, depending on passenger comfort, we have supplied 2 sets of the loop strips for convenience. When moving the unit to another location take care not to pull the loop strips off the vehicle unintentionally.

Do not fix the unit above seat height or near any airbag exit point

MobileAir Filter Technology

MobileAir contains the most effective filter technology available today, combining double layers of particulate and gas filters.

The Particulate Filter

Top quality purifiers often boast of their use of ‘HEPA’ (High Efficiency Particulate Absorber) filters, defined as able to remove 99.97% of particles larger than 0.3 microns (really very small – a single human hair is around 250 times as thick).  Less reputable brands may talk of ‘HEPA-like’ filters which is jargon for ‘Not a HEPA filter but you probably won’t know’.

The smaller the particle, the more readily it can get into your lungs and your blood stream, ending up inside your cells throughout your body.

The MobileAir contains two layers of Super HEPA – acting as a barrier to 99.99% of particles as small as 0.1 microns – or 1/10,000 of a mm.  Unlike traditional pleated HEPA filters Super HEPA is not manufactured with glues, binders or fibreglass and is ideal for users with chemical sensitivities.

The Gas Filter

The ONLY way to remove significant quantities of gaseous pollutants is with activated carbon. The source of the carbon, the method used to activate it, the size of particle, and various chemical processes all affect how well the filter will remove different polluting gases from the air.
The MobileAir uses Vocarb - a proprietary blend of carbons especially engineered to have the maximum effect on both nitrogen dioxide (NO₂) , the chief gaseous concern from diesel emissions and the numerous VOC’s (Volatile Organic Compounds) given off by vehicle interiors  and which react with N0₂ to form equally hazardous ozone.

Many purifiers claiming to have carbon filters contain just a few grams of a standard carbon.  Not only is the exact type of carbon important but these filters work by attracting the gases to their surface, so the more carbon, the better the filter and the longer it will last.  Many alternatives MobileAir contains a massive 2 lbs (900 g) of bespoke activated carbon granules, to create the longest lasting, most effective purifier on the road.

In general use the filters in a MobileAir will need replacing after 3 years.  However, in the heavily-polluted environment of a new car (yes, sorry) we strongly recommend changing the filters after the first 9 months.

Managing airflow with MobileAir


Let Us Help

Plain Air researches and delivers advanced air purification solutions.
Official Air Quality Testers to