Why should a cooking fume purifier not simply use the largest airflow?

Too little airflow causes inadequate treatment, while excessive airflow shortens residence time and increases noise and energy consumption. The purifier should operate within its rated airflow and be matched to the hood and fan. 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.