Parking facilities buy steam equipment on a site visit, a demo bay, and a promise about water use. The gap between that demo and a working bay on a Saturday afternoon is usually decided by a handful of questions that are easier to ask before the order than after it. These are the ones that matter.
How does the machine reach the cars, and how far can it go once there?
Multi-level car parks have ramps, tight turning radii, height limits and floor finishes that were never designed for a wash station. Ask how the unit moves: pushed by hand, mounted on a driven platform, or towed. Then ask what the operator does on a level with no water inlet and no power socket.
On a battery-powered unit, ask what a full charge covers, how long the charge takes, and what happens to the mode selection when the battery is low. A machine that has to be parked for two hours in the middle of a queue is not a mobile machine, whatever the brochure says. Take the figures from the unit's own parameter table and write them into the trial brief.
Which modes does it offer, and which one do you use on a car park floor?
A unit that only produces dry steam will clean a body panel but leave a muddy film on a forecourt. A unit that only sprays hot water will flood an indoor bay and start a drainage problem. Confirm which modes the machine provides — dry steam, wet steam, hot water — and ask the supplier which one they expect your operators to use on a concrete floor, on a painted panel and in an engine bay.
Ask the same question about the vacuum function where the machine offers one, since interior work in an indoor car park has no hose to a house vacuum and no drain to carry the water away.
What does the machine need from the site?
Get a written list of site requirements: inlet water connection and fitting size, water pressure if the unit needs it, power supply and outlet location, drainage or containment for the run-off, and the minimum floor area needed to work around a parked car. A 220 V mains machine and a battery machine imply completely different site preparation, and this is the question that most often turns up too late.
Then ask where the run-off goes. Indoor car parks drain to oil separators, and a wash bay that discharges more water than the separator can handle becomes an environmental problem, not a cleaning one.
What are the real limits on a vehicle, and what is excluded?
Ask the supplier to state, in writing, which vehicle areas the machine is intended for and which are outside its scope. On the Fixed Steam Cleaning Machine PowerDe HW02 the product page lists vehicle exterior cleaning at service stations and parking areas, interior vacuuming and disinfection, and engine-compartment work, together with leakage, short-circuit, high-temperature, high-voltage and water-shortage protection among the safeguards listed there. It also lists 6 kW heating power, 160° steam temperature, 0.8 MPa vapour pressure and an 80 L SUS304 tank — read the tank size against your queue, because it sets how many cars you finish between refills.
Ask explicitly about older vehicles, loose trim, aftermarket body kits, vehicles with known electrical faults, and cars whose owner has not consented to interior work. A procedure that has no answer for those four cases will produce a claim in the first month.
How fast can one operator finish one car?
Ask for a timed run, done by your own staff on your own floor, on three cars: a lightly dusty car, a car with a soiled interior, and a van or SUV with a dirty load area. Record the time for each, the number of refills, and the number of times the operator had to stop — for battery, for water, for tank capacity, for a blocked nozzle.
Those numbers, not the supplier's throughput claim, decide how many machines a facility needs and whether one operator can cover a shift.
What happens when it fails, and who fixes it?
A parking facility has no maintenance electrician on standby for a cleaning machine. Ask which parts fail most often, which of them an operator can replace without a service call, and what the response commitment is. Ask for the exploded parts list with orderable part numbers, and check how long the fast-moving items take to arrive.
Ask how faults are reported to the operator. A readable fault indication lets a shift supervisor clear a simple problem in minutes; a machine that just stops takes the bay out of service until someone arrives.
A short list to send before the trial
- Movement method and the limits it has on ramps and levels
- Charge time, working time per charge, and behaviour at low charge
- Available modes and the recommended mode per surface
- Water inlet, power, drainage and space requirements in writing
- Vehicle areas covered and areas excluded, with the four claim-prone cases named
- Timed runs by your staff on three vehicle types
- Fault list, operator-replaceable parts, spares lead time and response terms
Send the list to every shortlisted supplier and compare the answers side by side. Suppliers who answer with specifics are usually describing a machine they have put in a car park before.
If your facility does not fit the standard layout
Sites with no drainage, restricted headroom or a queue that only appears in two hours of the day often need the arrangement designed around them. You can describe your facility through Solutions, or reach us on the contact page. The full cleaning range is listed under PowerDe cleaning equipment.
