ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. |  ventilating system - a mechanical system in a building that provides fresh air; "she was continually adjusting the ventilation"mechanical system - a system of elements that interact on mechanical principles ventilation shaft - a shaft in a building; serves as an air passage for ventilation ventilator - a device (such as a fan) that introduces fresh air or expels foul air |
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