For any equipment or ovens that generate exhaust gases, it is necessary to use a fixed exhaust hood to prevent the dispersion of harmful gases indoors. Depending on the type of gas being emitted, common materials like PP and PVC are suitable for acidic or alkaline gases, while SUS is suitable for organic gases. Additionally, for ovens, exhaust hoods can be installed at the door openings and heat vents to ensure the safety of personnel during operation.