A fixed steam cleaning machine stays where you install it. Unlike a mobile unit that can be moved between bays, a fixed machine is committed to one position, one electrical circuit and one drainage route for its whole service life. That is exactly why comparing two or more machines on price and headline claims alone leads to expensive surprises. A useful product comparison records the details that predict how each machine will behave at your site — and marks clearly what each vendor has not yet stated in writing.
The list below follows the order in which a buyer for a wash bay, a fleet depot or a maintenance shop would actually fill in the comparison sheet for a fixed steam cleaning machine. Where an example value is quoted, it is taken from the published data sheet of the PowerDe HW02, one of the fixed models in PowerDe's cleaning range; treat it as an illustration of how a complete data sheet should read, not as a recommendation to buy that model without testing.
Start the sheet with your own task, not with the machines
Before opening any specification, write down what you will clean, in what condition the soil is (loose dust, fresh oil film, or polymerised old grease), how much time you realistically have per cleaning session, and what power, water and drainage exist at the intended position. Every later row of the comparison is judged against this baseline. Two machines that look identical on paper stop looking identical the moment you match them against a specific task and a specific location.
Steam temperature, pressure and mode — and what each one decides
Record the steam temperature and the working pressure, and note the conditions under which the vendor measured them. For saturated steam these two figures describe the same state of the steam rather than two independent capabilities, so a data sheet that lists 160 °C steam temperature and 0.8 MPa vapour pressure — as the PowerDe HW02 sheet does — is describing one steam condition. Higher temperature shortens the time heat needs to act on grease, so this row usually decides cleaning results more than any other. If a sheet gives marketing phrases such as "high temperature" without numbers, mark the row as unanswered and ask for figures in writing.
Next, record whether dry steam and wet steam are both available and how the operator switches between them. Dry steam carries little free moisture and suits electrical areas, engine compartments and surfaces that must stay close to dry; wet steam adds water to soak stubborn, polymerised deposits. The HW02 page lists dry/wet steam switching together with a vacuum function. If a sheet simply says "steam", ask which mode is meant — the two modes do different jobs.
Heating power determines how fast the machine recovers between shots of steam and how long it can run before a pause. The HW02 sheet lists 6 kW. Where heating power is not stated, the real working rhythm of the machine is unknown, so treat that as an open question for the vendor rather than an assumption.
Tank capacity, converted into a working cycle
A tank figure such as the HW02's 80 L SUS304 tank tells you little until you convert it into your own work: how many vehicles or surfaces can be cleaned before the tank must be refilled, and how long reheating takes between cycles. Ask each vendor for those two numbers in writing and put them in the sheet. A machine that needs refilling and reheating every few minutes quietly changes your staffing plan, and that cost never appears on the price list.
Utilities and access — the rows most often skipped
A fixed machine is tied to what your building can provide, so compare the installation demands as carefully as the steam performance. For each candidate record: the working voltage and whether a dedicated circuit is required (the HW02 lists 220 V); the water inlet type and where it will connect (the HW02 lists a tap-water inlet with a 4-point internal-thread joint, 1/2 inch); the drainage route and whether grease separation is required by your local authority; and the machine's dimensions against your doorways and the path to its final position — the HW02 sheet lists 1,200 × 800 × 1,200 mm including handles. A machine that cannot be wheeled through the door to its installed position is the wrong machine, whatever its steam parameters say.
Protection features — read what they actually protect
The HW02 page lists leakage, short-circuit, high-temperature, high-voltage, water-shortage and high-voltage-explosion protection. Built-in protections guard the machine; they do not guard your electrical circuit, your floor drainage or your operators. In the comparison sheet, note each protection offered and, in the column beside it, what still has to be verified at your site — circuit capacity, drainage route, ventilation and operator training remain your responsibility whichever machine you choose.
The items no marketing sheet carries
The cost of owning a fixed machine over several years is decided mostly by items that never appear in a product brochure. Give each of these its own row and fill it in from written answers, not from a sales call:
- Hose and wand lengths, and which accessories are included as standard rather than optional extras
- Spare-part availability, prices, and who stocks them near you
- Warranty terms, what voids the warranty, and who performs service visits
- Response time when the machine is down, and the nearest service point
- Commissioning and operator training included in the quoted price
- Lead time from order to delivery, and shipping terms to your site
A one-page structure for the comparison sheet
Put the rows together in one table so that two or three candidates can be read side by side. The structure below has worked for wash-bay and depot buyers; the example column shows what a complete published data sheet looks like when it answers the question.
| Comparison row | What to record, and why it decides the outcome | Example from a published data sheet (PowerDe HW02) |
|---|---|---|
| Steam temperature and pressure | The figures that determine how fast heat acts on grease; record values and measurement conditions | 160 °C steam temperature, 0.8 MPa vapour pressure |
| Dry / wet steam modes | Dry steam for moisture-sensitive areas, wet steam for stubborn deposits; note how the switch is made | Dry/wet steam switching, plus vacuum function |
| Heating power and tank | Determines recovery time and jobs per refill; convert capacity into a working cycle in your own units | 6 kW heating power, 80 L SUS304 tank |
| Electrical requirement | Whether a dedicated circuit is needed at the fixed position; an electrician must confirm before ordering | 220 V working voltage |
| Water inlet and drainage | Inlet type and fitting size decide plumbing work; drainage and grease separation rules are set locally | Tap-water inlet, 4-point internal-thread joint (1/2 inch) |
| Dimensions and access path | Measure doorways, corridors and the final position before the machine is chosen, not after delivery | 1,200 × 800 × 1,200 mm including handles |
| Protection features | Note what each protection covers — and what still must be checked at your site | Leakage, short-circuit, high-temperature, high-voltage, water-shortage and high-voltage-explosion protection listed on the product page |
| Accessories, spares, warranty, service | The ownership cost over years; fill in from written answers only | Not published on the product page — request in writing |
Finish the comparison with a test on your own equipment
A paper comparison ends where a one-day trial begins. Ask the shortlisted vendors to test on your own surfaces, with your own soil, inside your real time window. Clean half of one surface and leave the other half as a reference, time each working cycle including refills and reheating, and note drying time and any residue left behind. Enter what you observed in the same sheet, beside the claimed parameters. A claim that survives a trial on your equipment is worth more than any specification line, and a claim that does not will save you from a machine that sits unused.
One caution before you finalise the sheet: the HW02 product page describes vehicle exterior cleaning at gas stations and parking lots, interior vacuuming and disinfection, and engine-compartment cleaning. If your task falls outside those uses, confirm suitability with the manufacturer before ordering — the PowerDe cleaning equipment range also includes driving-style and hand-pushed models for other settings, and the right machine for your site may not be the fixed one. Send your cleaning task, your site conditions and your time window to the supplier — you can do so through the contact page — and judge the written answers side by side. The comparison sheet that ends with a record of what was tested at your site, rather than only what was printed in a brochure, is the one that protects your budget.
