What is the difference between an integrated cooking fume purifier and a separate hood-plus-purifier system?

An integrated unit combines the hood, purification section and fan connection in one compact system, while a separate system offers flexible configuration but requires matching airflow, static pressure, efficiency and space. Small shops, stalls and retrofit kitchens often prefer integrated units; large kitchens with complex ducting may need a separate custom system. Checklist: Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.