How should daily water change be evaluated when buying a lifting noodle cooker?

To judge daily water change, time the whole routine as your kitchen actually runs it: drain, refill, reheat to rolling boil, sanitize, and return to service. During acceptance, perform one full change before the lunch rush and log both duration and temperature recovery; then check whether consecutive noodle batches stay at boil or turn doughy. Fast draining with slow recovery points to weak heating elements or poor refill design, so brochure figures mislead. Put that measured time and a pass limit into the technical agreement as a binding commissioning check for the auto-lifting noodle boiler.