A vehicle includes an outside air passage, accommodation cases, an outside air communication opening, an outside air valve, a case communication opening, and a case valve. The outside air passage is capable of allowing outside air to flow through the outside air passage. The accommodation cases are disposed to be compatible with the outside air passage and accommodate predetermined units independently. The outside air communication opening is capable of allowing communication between the outside air passage and the accommodation case. The outside air valve is capable of opening or closing the outside air communication opening. The case communication opening is capable of allowing communication between adjacent ones of the accommodation cases. The case valve is capable of opening or closing the case communication opening.