| 1. Regulatory Compliance | Applicable product documentation, installation records, inspection documents where required, and references to relevant standards, including GB/T 21739 for residential elevators where applicable. | Check that the documents match the proposed model and installation site. Confirm current national and local requirements with the relevant authorities or a qualified inspector. |
| 2. Suitability for the Building | A site survey, proposed layout, and drawings showing shaft dimensions, pit depth, overhead clearance, entrances, and structural interfaces. | Compare the drawings with measured site conditions. Ask the supplier to identify any building modifications and confirm who is responsible for them. |
| 3. Capacity and Travel Requirements | A written specification covering rated load, rated speed, number of stops, travel height, car dimensions, and intended use. | Confirm that the proposed configuration suits the household’s needs and the building. Compare suppliers using the same load, travel, and stop requirements. |
| 4. Drive and Power System | Drive-system description, power requirements, operating details, and maintenance recommendations for the proposed configuration. | Review space needs, expected operating conditions, service requirements, and compatibility with the property’s available electrical supply. Do not rely on a drive-type label alone. |
| 5. Safety Features | Documentation describing protective devices, door interlocks, overload protection, movement controls, and other safety provisions included with the model. | Verify which features are included in the quoted specification and how they are tested and maintained. Have a qualified professional check the final design and installation. |
| 6. Emergency Operation | A written explanation of the emergency communication and rescue arrangements, backup provisions, and user instructions for power interruptions or entrapment. | Ask who can respond, how users summon assistance, and what procedures apply at the site. Confirm that household members can understand and follow the instructions. |
| 7. Doors and Accessibility | Door configuration and clear-opening dimensions, control-panel layout, and details of any accessibility options offered for the selected model. | Check the design against household users’ mobility needs and the available space. Confirm that the proposed entrances and controls are practical for daily use. |
| 8. Energy Use and Operating Noise | Available energy-consumption data, operating specifications, and information about noise and vibration under stated test or operating conditions. | Compare figures only when the measurement conditions and configurations are comparable. Ask how installation, building structure, and maintenance may affect noise and performance. |
| 9. Installation and Service Capability | Installation plan, project responsibilities, technician qualifications, service coverage, maintenance schedule, and a process for reporting faults. | Confirm who performs installation and maintenance, what service is available in the property’s location, and how urgent faults are handled. Request references for comparable projects. |
| 10. Warranty, Parts, and Lifecycle Cost | Written warranty terms, exclusions, spare-parts information, routine maintenance costs, and a breakdown of the quoted price and optional items. | Compare the full expected cost, not just the purchase price. Check warranty coverage, parts availability, service charges, and which repairs or consumables are excluded. |