Is a higher rated purification efficiency always better?

Rated efficiency must correspond to rated airflow, test conditions and maintenance status; without airflow, cleaning intervals and proper installation, a single efficiency figure is meaningless. Review test reports, rated airflow, resistance, cleaning intervals and after-sales commitments. 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.