But you don’t need to turn over the air that much – three-to-five times per hour is all you need hence Philips 95m3 recommendation. It is nice to see conservative figures for a change.

We sat the unit in a 100m3 open space office – 7 (L) x 5 (D)x 3 (H) metres presently with five staff in it. It has a split system air conditioner (closed, recycled air) and the entry door can be shut.

Have a look at air quality from last week – dust, fires and more.

The Philips series 3000 keeps the room in the green. Little spikes are when doors are open or believe it or not – flatulence (now we know who the smiling assassin is). Then came the dust storm (first and second image peaks) and the machine bought it down quickly. When powered-down overnight the air quality index grew rapidly. Then it was back to normal – as it should be.

It works – no doubt.

Other indicators

Offices can be dusty. Over the four weeks, we saw almost no build-up of dust in the test area.

Hay fever sufferers usually do so in silence (apart from violent sneezing fits). Those unfortunate souls are much happier in a clean, purified air environment. In fact, after an hour or so in the office wet, itching eyes stop. They demand we buy one, now!

Design

It looks modern and clean. It sucks air through two side facing slits through the three independent filters and expels it gently up through a grill at the top/back. It is not a forward-facing fan design which can blow air directly at you or move papers of desks!

The pre-filter is washable, and it will alert you when it needs a clean. The Active Carbon filter FY3432 ($68.95) lasts about 12 months. The HEPA filter FY3433 ($89.95) lasts about two years. It has very low running costs in comparison to most other purifiers. If the filters are dirty and you don’t replace them the unit locks until you do (or you can override the lock). But hey, its job is to clean.

A Philips Air Purifier tells you the air quality

Philips Air Purifiers

It has an LCD indicator for air quality, fan speed and more.

Philips has a PM2.5 index (ranges from 2.5µm upwards) that uses a soft glowing ring light to show air quality. Blue is good, blue-violet is fair, red-purple is unhealthy (and that shows what flatulence does), and red is very unhealthy. These equate to the good, fair, poor, and very poor air quality data. The Philips air purifier will remove matter down to 0.02um (99.9%) as well as smoke, dust, bacteria, car fumes etc. I repeat – it works.

You can adjust fan speeds from 1 to 5 or set it to auto. Philips state noise is from 32.5 to 63.8dB.  Out tests show on fan level 1 at 2m from the unit it is 32dB (quiet library) and at level 5 it is 50dB (quite office/moderate rainfall).

It should not impact sleep – if so, use sleep mode (level 1 and lights off). Because it is not a fan, the outflow of air is gentle. Leave it on auto – if you hear the fan whirl up then you know something, or someone is polluting the air.

It has a child lock. Power use ranges from 11 to 60W per hour.

GadgetGuy’s take: The Philips Air Purifier work for me

It is not our usual techy, must have an app, voice assistant, gadget with a price tag to suit – it is an honest answer to 21st-century air quality issues.

Perhaps it is that no-nonsense and low running cost approach that got the product into our review program.