Air Freshener for Office , help to find a good one

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Some offices like the one DH worked in were sealed so no windows to open. In that case what they did was ban all hot cooked food and takeaways (these had to be taken to the staff rest room where they had a fiercer aircon). I remember a Deb electronic system that puffed out at intervals as was meant for offices etc - domestic ones aren't really good enough - depending of course on how large your offices are.

No, I think you should open the windows.
Silly question.

Looking forward to recommendations for some obscure air-freshening-system, possibly only available in Canada...