| 1 | Cleaning or Filtration Performance | Require independently tested performance data for the intended particle size, airflow, and operating condition. For HEPA-based systems, verify the stated filter class and test method rather than relying only on a percentage claim. | Performance can vary significantly with airflow, filter loading, installation, and test conditions. Comparable test methods are essential for accurate supplier comparison. | Laboratory test report, filter specification sheet, airflow test curve, pressure-drop data, and product test conditions. | 20% |
| 2 | Airflow and Coverage | Confirm airflow in m³/h or CFM, effective coverage dimensions, air velocity where applicable, and the recommended installation height or distance. | A cleaner that is undersized for the opening or room may not deliver the expected protection or cleaning performance. | Technical datasheet, airflow-versus-static-pressure curve, application calculation, and installation diagram. | 14% |
| 3 | Electrical and Safety Compliance | Check compatibility with the destination-market voltage, frequency, plug type, protection class, overheating protection, and applicable electrical safety requirements. | Electrical requirements differ by market. Incorrect voltage or incomplete safety documentation can create installation, customs, and liability risks. | Declaration of Conformity where applicable, electrical test report, wiring diagram, rated-label photograph, and user manual. | 14% |
| 4 | Filter Type and Replacement Cycle | Identify pre-filter, fine-filter, HEPA, activated-carbon, or other filter stages. Obtain replacement intervals based on dust load and operating hours rather than a single universal period. | Consumable availability and predictable maintenance costs directly affect total ownership cost. | Filter construction details, replacement part numbers, maintenance schedule, pressure-drop limits, and spare-parts quotation. | 12% |
| 5 | Noise and Energy Efficiency | Compare sound pressure level in dB(A), rated power in W or kW, operating modes, motor efficiency, and standby consumption under the same test conditions. | Noise affects user comfort, while energy consumption influences operating cost and environmental reporting. | Noise test method, power-consumption data, motor specification, energy label where applicable, and sample test results. | 10% |
| 6 | Build Quality and Environmental Suitability | Verify enclosure material, corrosion resistance, operating temperature, humidity range, ingress protection rating where claimed, and mounting strength. | Warehouses, food facilities, clean areas, and coastal locations impose different environmental demands. | Material declaration, IP test report if applicable, environmental test data, installation instructions, and quality-control records. | 10% |
| 7 | Supplier Quality Management | Prioritize suppliers with a documented quality system, incoming-material inspection, process inspection, final inspection, traceability, and corrective-action procedures. | A consistent manufacturing process is more reliable than a single successful sample. | Quality certificate, factory audit report, inspection checklist, defect-rate records, and corrective-action examples. | 10% |
| 8 | Customization and Minimum Order Quantity | Clarify available dimensions, voltage options, control interfaces, housing colors, packaging, private labeling, sample policy, and minimum order quantity before quotation. | Different markets may require different electrical configurations, installation dimensions, manuals, and packaging languages. | Written quotation, customization matrix, engineering-change process, sample invoice, and packaging artwork requirements. | 7% |
| 9 | Delivery and Export Capability | Evaluate production capacity, stated lead time, packaging protection, carton dimensions, gross weight, HS-code support, Incoterms, and export-document accuracy. | Reliable documentation and packaging reduce customs delays, transit damage, and unexpected logistics costs. | Commercial invoice sample, packing list, carton specification, export references, production schedule, and shipping terms. | 7% |
| 10 | Warranty and After-Sales Support | Compare written warranty coverage, response time, spare-parts availability, troubleshooting support, repair procedure, and responsibility for transport or replacement. | After-sales capability is particularly important when the supplier and installation site are in different countries. | Warranty terms, service-level agreement, spare-parts list, technical-support channels, and escalation procedure. | 6% |
| 11 | Total Cost of Ownership | Calculate purchase price, freight, duties, installation, electricity, filter replacement, maintenance, downtime, and disposal costs over the expected service period. | The lowest purchase price may not be the lowest long-term cost when energy use, consumables, or service requirements are higher. | Five-year cost model, energy assumptions, filter prices, maintenance schedule, spare-parts pricing, and disposal guidance. | 10% |