Patent ID: 11933177
Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
Field: Civil engineering (Other fields)
Classification: CPC E  F  H  Y | IPC E  F

Claim 0:
1. A ventilation system comprising:
a building that has a space inside;
a subterranean facility that is arranged in a basement of the building and that has a subterranean space inside;
a communication passage configured to establish communication between the space of the building and the subterranean space; and
a ventilation hole configured to establish communication between an earth outside the building and the subterranean space, wherein
a fuel cell unit having an exhaust port is arranged in the subterranean space,
the communication passage has:
a first opening portion that is formed on a side of the subterranean space and arranged apart from the exhaust port of the fuel cell unit in a horizontal direction; and
a lateral wall that covers at least a part of a periphery of the communication passage and that protrudes downward from a ceiling of the subterranean space, and

the first opening portion is arranged below a second opening portion that is an opening portion of the ventilation hole on the side of the subterranean space.