Been doing some reading up. The Copen does not have a filter for the Air-Con. Not even in Asia. On the Singapore Copen club they have a "how to fit an Air-Con filter" guide. There is a place for a filter, just hasn't been fitted. You need a filter frame from a Perodua Kelisa. Perfect fit for the hole. Then just add a filter.
Not a modification I'll be doing. You get it by removing the glovebox, then contorting yourself to get to the access cover. By all accounts it's far from easy. I'd post a link to the guide, but without being a member you won't be able to access it.
Here's the filter on Yahoo auctions http://page17.auctions.yahoo.co.jp/jp/auction/v283858949#enlargeimg
Fan / heater motor Sorry to jump on the back of this thread guys, my fan heater has packed up recently on my 54 plate copen vivid. I'm planning to replace the fan myself, just need to figure out how to get to the thing!! any ideas?? Any chance of that link on how to remove the glove box any any useful tips would be appreciated!! Thanks in advance Micky