[quote=@The Spectre]
	Yeah, don't forget about [i]Metro[/i] as well. This roleplay mostly reminds me of that game.
[/quote]

Air filters definitely have time limits here. My character has some pretty state-of-the-art equipment (for the mid-nineties) and he'll bitch at least once about how his filters cost 22 pounds a pop even before the smuggling fees.