Wash throughput refers to the number of vehicles a car wash can process per hour or per day. It is the key operational metric that directly drives revenue — every minute of idle bay time is lost income. Optimising throughput without sacrificing wash quality requires balancing chemistry, equipment, and workflow.
Factors affecting throughput:
- Contact time — faster-acting chemistry reduces dwell time. However, cutting contact time too short hurts wash quality and leads to rewashes.
- Chemical performance — a high-quality active foam that cleans in one pass eliminates the need for repeat applications.
- Equipment flow — dosing pump speed, water flow rate, and high-pressure lance coverage all impact cycle time.
- Bay layout — drive-through designs are inherently faster than back-in bays.
Benchmarks:
- Self-service bay: 4–8 vehicles/hour (operator-dependent).
- Automatic rollover: 10–15 vehicles/hour.
- Conveyor tunnel: 60–120+ vehicles/hour.
Improving throughput without cutting corners:
The most effective lever is better chemistry. Products like Fortis Foam PRO are formulated for rapid dirt emulsification, meaning shorter contact time with the same or better results. Combined with correct dilution ratios, this translates directly to higher throughput.
For a financial perspective on optimising your operation, read saving money at your car wash.