When an Emergency Storage A and Emergency Storage B love each other very much...they go to the Emergency Storage store, buy themselves an Emergency Closet, and leave it in Samedi's southern asteroid to let it grow and learn to fend for itself. The whole process tends to go surprisingly well, all things considered.
Anyways, Emergency Closet is a little shed below Research that stores various emergency supplies, like glowsticks and extinguishers. If you've a few booboos or burns and can't be bothered to go to Medbay, you might want to check out the surprisingly ample array of medical patches and medkits here. If you suddenly find yourself sniffing plasma gas, you should probably get the air scrubber, and if the station's breached, and you're not breathing any gas whatsoever, check out the O2 cabinet.
There is no vent. It's not old enough for one.
There is no APC. It's just not at that stage yet.