You won't see this mentioned anywhere in the advertising, and dealers/websites won't mention it either (even, in our case, when we asked a specific question).
But the manual makes it very clear that if the cleaner is to continue to function properly you'll have to replace the Exhaust Filter 'at least once a year'. In a larger house that's going to be two or three times a year. These filters cost £6.99 each with postage.
But it gets worse - a lot worse. Having discussed this with Panasonic, it becomes clear that the Dust Compartment Filter also has to be changed (probably once a year). These cost a staggering £34.61 each with postage.
Each of these filters has been deliberately designed so that it cannot be cleaned or washed. That means replacement is unavoidable.
So your nice new Panasonic cleaner is going to cost you somewhere around £40 a year (and quite possibly more than that) just to replace the filters that have been designed so that you can't clean them. Thanks, Panasonic - for not caring about the environment with your filters that can only be thrown away and replaced with new ones. And for putting your profits ahead of customer care and the environment (despite all the grand-sounding claims about Green Design on your website).
After 30+ years of buying Panasonic products, this one's now going back for a refund. And I'll take a lot of convincing before buying any more Panasonic products after this let-down.