Found 24th Mar 2017
This seems to go by different names depending on where you buy it. Amazon full price £149.99. Argos where it is called the AR20 ( identical specs ) is £149. For me it works, clear nose and eyes. The filter lasts 18 months and is cleanable. Replacement cost about £20. It's quite big but there is a smaller one at £74.99. Three year guarantee.