Selection of the cross-section area shape of the ducts used in the shelter ventilation systems – analysis

Ventilation ducts are the basic element of any ventilation system. The paper presents three shapes of ventilation ducts used in industry and discusses them with particular emphasis on the possibility of using them in the con-struction of shelters. Circle ducts, rectangular ducts, and rectangular ducts with rounded corners. The flow and strength parameters of the indicated ducts were analyzed, and the advantages and disadvantages of individual so-lutions were presented. Based on the conducted analysis, knowledge gaps were identified.