Buyers should prioritize load capacity (typically ranging from 8kg to 30kg for standard commercial use) and the solvent type compatibility. Modern high-end machines are often multi-solvent compatible, supporting Perc (Perchloroethylene), Hydrocarbon, or Silicone-based solvents. Ensure the machine features a closed-loop system with a high-efficiency refrigerated recovery unit to minimize solvent consumption and environmental impact. Additionally, look for stainless steel construction for the drum and solvent tanks to prevent corrosion.