Set the boundaries before the first pass
Delivery vans differ from passenger cars in the way a cleaning method meets them. The rear load area is in daily use, the body panels take scrapes from racking and loading, and many newer vans carry cameras, radar modules and a front sensor bar. Those differences decide what you steam and what you do not.
- In scope for the trial: lower body panels and wheel arches, the rear step and bumper, the load-bay sill and the external face of the rear doors, plus road-spray deposits along the rocker panels.
- Out of scope for staff: camera lenses and housings, radar and sensor modules, the front grille area behind which those parts sit, exposed wiring looms, air intakes, and any connector or junction box. Where the manual or a dealer says a component must not be pressure-washed, treat steam the same way and leave it for the workshop.
- Conditional: engine-bay cleaning. The PowerDe HW02 steam cleaner product page lists engine-compartment cleaning as one of its duties, so it is a supported use of the machine. Run it in the trial only on a vehicle whose bay is in good condition, with the engine cool, the battery and fuse box covered, and the operator briefed to keep the nozzle moving rather than dwelling on any connector.
Preparation that protects the test result
A trial on a dirty, hot, unprepared van produces an unfair comparison. Do these five things first, and write them into the trial sheet so the same conditions apply to every vehicle you test.
- Park on a hard, drained surface with a water supply and a power point within the machine's cable reach. A 220 V machine needs a proper supply on a circuit that can carry its heater load; check the machine's rating against the circuit before plugging in.
- Let the bodywork cool. Steam on a hot panel flashes off before it has time to soften the deposit, and it also makes the panel too hot to handle afterwards.
- Rinse loose grit off the panels first. Driving steam straight into a film of road dust turns it into abrasive slurry that scratches paint as it is wiped away.
- Close and latch the doors and windows, and check door seals. Steam around a worn seal will find its way into the load compartment, which is exactly what you do not want to discover on a vehicle loaded with stock.
- Photograph the panels you intend to clean before starting, with the same angle and light used after the test. Without a before image, the trial becomes an opinion.
Run the test on half a panel
This is the single most useful habit in a trial. Pick the dirtiest panel, treat one half of it, and leave the other half alone. Both halves then share the same paint, the same age and the same deposit, so the difference you see is the method and nothing else.
- Start on the least sensitive area — the rear bumper, the wheel arch or the load-bay sill — so the operator learns how the nozzle behaves before working on painted bodyside panels.
- Hold the nozzle at a distance and keep it moving. If the machine offers a choice of spray, use the drier setting on vertical panels and the wetter, higher-pressure setting on the bumper, sills and wheel arches where the deposit is thickest.
- Work from the top of the panel down, so released grease runs onto an area you have not yet finished rather than onto a cleaned one.
- Wipe with a clean microfibre as you go, and change the cloth often. A saturated cloth redeposits grease and makes a good result look poor.
- Record time on the panel, water used, and whether the deposit came off in one pass or needed a second.
What to measure, not just what to look at
For a fleet decision, four numbers decide whether the method scales.
- Operator minutes per van for the exterior, compared with the current wash routine.
- Water used per van, read from the tank rather than estimated. A 220V steam cleaning machine with an 80 L tank such as the HW02 shows how much of one fill a single van consumes, which is the figure that matters when you have a dozen vans and a constrained supply.
- Chemical used, counted in doses. If steam replaces detergent on the heavy panels, that saving is real and repeatable.
- Passes needed per panel. One pass means the method fits a tight turnaround window; three passes means it does not, however good the finish looks.
Operator safety and the site rules
Steam is the hazard in this trial, not the paint. The operator should wear gloves and closed footwear that covers the ankle, keep the lance away from the body, and never aim at another person. If the wash bay floor drains poorly, steam and rinse water make it slippery; put the trial on a drained surface and keep the area cordoned while the machine is live.
Check two site constraints before you commit. First, water discharge: where the wash bay drains to a foul or surface-water system, find out what your site is allowed to discharge and whether the wash water needs to go to an interceptor. Second, power and movement: a machine on wheels has to reach the van, and if the yard layout means carrying it over kerbs or through a narrow gate, that cost belongs in the trial result.
Deciding from the trial
Test at least two vehicles: one lightly soiled city van and one with genuine road grime and a dirty load bay sill. One vehicle tells you nothing about how the method behaves across a mixed fleet. Write down the four numbers, attach the before and after photographs, and note every area you excluded and why — that exclusion list is what becomes the standard operating instruction if the trial succeeds.
PowerDe's fixed steam cleaning machine HW02 is listed for vehicle exterior cleaning at gas stations and parking lots, interior work and engine-compartment cleaning, with 6 kW heating power, 160 °C steam temperature, 0.8 MPa vapour pressure and an 80 L stainless steel tank. The listing's application set is vehicle-focused rather than fleet-specific, so before buying for a delivery fleet, confirm with the manufacturer which nozzles and settings suit your panel types and sensor layout, and whether customized steam cleaning equipment is the better route for your bay layout.
