When procuring an industrial aging furnace, the most critical factor is temperature uniformity, which should ideally be within ±3°C to ±5°C to ensure consistent mechanical properties of the aluminum profiles. Buyers should prioritize furnaces equipped with high-velocity centrifugal fans for optimal air circulation and high-density rock wool insulation (at least 150mm thickness) to minimize heat loss. Additionally, verify the heating method (gas-fired, electric, or oil) based on your local energy costs and the PLC control system brand (e.g., Siemens or Mitsubishi) for reliable automated operation.