The price on a quotation for a fixed steam cleaning machine is the smallest part of what that machine will cost the facility. The larger share arrives every shift, in power draw, water, chemicals no longer bought, labour hours recovered, downtime avoided and the waste stream that has to be collected and disposed of. A facility can price all of it from its own records without relying on a supplier's claim. The method below uses published machine parameters and your site's own tariffs and wage rates, which is the only way the comparison survives a challenge from a finance department.
1. Write down the baseline you are actually running
Before any machine is costed, cost the current method. Record, for the task as it is done today: labour hours per cycle and the loaded wage rate; chemicals used per cycle and their delivered price; water consumed; how long the area is out of service; and what the cleaning is expected to achieve, stated in observable terms. Add the indirect costs people forget — the interceptor that has to be pumped, the absorbent and PPE stock, the rework when a surface fails inspection, and the overtime incurred because the task ran past the shift.
Do this with a clipboard on the floor, not from a spreadsheet. The numbers that matter are hours per cycle and cycles per week; everything else is a multiple of those two figures. If you already have a contract cleaner, ask for their recorded hours per area — a contractor who will not give you that number is hiding the variable that decides your payback.
2. Energy: use the rated load and the real duty cycle
A fixed steam cleaning machine such as the PowerDe HW02 is rated at 6 kW heating power on a 220 V supply, with an 80 L tank. Rated power is not consumption; what matters is how many of those kilowatts are drawing current during a working hour. A heater that is already at temperature draws far less than a cold start, and a machine that is used in short passes with dwell time draws less than one run continuously at full output.
To cost it honestly, plug in a meter, or use the machine's own run log if it has one, and record kilowatt-hours per shift for a week of real work. Multiply by your site's all-in tariff, including any demand or peak charge the heating load pushes you into. Then ask the second question: does the heater run during the whole task, or only while the deposit is being softened? On a machine producing 160° steam at 0.8 MPa, the heat does the work on baked-on grease, so the operator's dwell discipline shows up directly on the meter. Two crews with the same machine can differ in energy per cycle purely through technique.
One line most facilities omit: the fixed installation has no battery to charge and no fuel to buy. Where a site compares a fixed unit against a battery-powered mobile unit, add the charging energy and the eventual battery replacement to the mobile column before deciding. That comparison is the reason a facility with a fixed wash lane, power and drainage usually lands on the fixed machine.
3. Water: cost the litre you remove, not only the litre you buy
Steam cleaning puts far less water onto a surface than a hose or a cold pressure washer, because the cleaning energy comes from heat rather than volume. That saving only becomes money when it is measured. With a machine carrying an 80 L tank, fill from a metered tap, or count refills per shift against the tank volume, and compare the total with the volume used by the current method over the same area.
Price the whole water path: supply, heating if the site heats its wash water, pumping or pressurisation, and above all the effluent route. A wash bay discharging oily water into a surface drain is a liability, not a cost line. Where the run-off has to go through an interceptor or a bunded collection point, less water on the floor means less contaminated effluent to handle, and that saving is usually larger than the supply saving. On industrial steam cleaning equipment working oily deposits, cost the interceptor pump-out frequency before and after the change; if it falls, you have found a real annual saving that nobody put in the proposal.
4. Chemicals: price the whole removal, including storage and disposal
High-temperature steam softens grease and bonded oil so that pressure moves it, which means a facility may reduce or stop buying caustic or solvent degreasers for that task. Do not book only the litres saved. The real figure includes the storage area and its containment, the safety data sheets and the COSHH or hazard assessments, the training and the PPE the chemical demanded, the spill kit, the disposal of the container, and the rinse water the chemical required afterwards. Some of those costs are fixed and will not disappear; be conservative and credit only what genuinely stops.
Keep chemicals in the comparison where the deposit demands them. A steaming pass plus a targeted chemical on the worst deposit is often the correct method, and a costing that assumes total chemical elimination will fail its own audit. Where a facility needs steam degreasing equipment for heavy deposits, the honest question is which chemical lines shrink, not which one disappears.
5. Labour: recover hours, and be careful what you count
Labour is where most of the payback sits, and where most of the exaggeration sits. Count only hours that genuinely stop being worked. Scrubbing and scraping time removed from the task is a saving. An operator refilling a tank is not a saving, it is a transfer. And the single most valuable labour effect is rarely counted at all: when a hot surface is steamed instead of soaked, the area dries sooner and returns to service sooner, which converts into extra productive hours rather than a smaller wage bill.
Measure both. Time each zone, start to finish, including preparation and clean-up, for the existing method and for the steaming method, over the same number of cycles. Then time how long the area is unusable afterwards. Multiply the difference by the loaded labour rate, and separately by whatever the out-of-service hour is worth in lost throughput. Two numbers on paper, one for labour and one for availability, make a far stronger business case than a single blended saving.
6. Downtime, quality and the cost of doing it twice
Failures that follow cleaning are a real cost: a machine that stalls after a wash because water reached a scale, a guide or an electrical enclosure; a floor that fails a slip check; a surface re-soiling within days because the deposit was moved rather than removed. Price what those cost you now, using your own maintenance log and inspection records. Then write the protection rules for the new method — what must not be sprayed, what must be covered, what must be contained — and treat the cost of that discipline as part of the method, not as an optional extra.
Quality should be judged against a stated standard and re-checked after a week. A surface that stays clean longer means fewer cycles per year, and cycles per year is the multiplier on every other line in your model. If the steaming method halves the number of deep-clean cycles on a kitchen extraction line, it halves the associated consumables, run-off handling and access time as well.
7. Maintenance, spares and consumables over the life of the machine
Nothing that generates heat and pressure at that level is free to run. Budget for nozzle and seal wear, hose and wand replacement, filter and tank servicing, water treatment if your supply is hard, and the electrical checks your site requires for equipment on a production or public floor. The HW02's tank is SUS304, which matters here: the grade of the wetted parts changes what a scaling supply does to the machine and how often it has to be descaled. Ask the supplier which parts are wear items, what they cost, and how quickly they ship; then put a spares holding on the ledger rather than waiting for a breakdown to reveal the lead time.
Water quality deserves its own line. A hard supply will dictate maintenance intervals on any steam machine. Cost the water you have, not the water you would like: if the site has no softening, add treatment or a descaling regime to the annual figure before you call the machine cheap to run.
8. Installation: the capital line that decides whether the rest is possible
A fixed machine needs a circuit that carries its load, a tap-water connection with the fitting it is supplied with, and a place to stand that does not block an aisle. The HW02's specification gives a 220 V working voltage, a tap-water inlet and overall dimensions of about 1,200 × 800 × 1,200 mm including handles. Cost the electrician's work, the plumbing tie-in, the drainage or collection point, and any permission or permit the installation requires. Compare that once against the recurring cost of a mobile machine that must be refilled and relocated across a site where those services do not exist — a mobile unit trades capital for hours of crew time, and those hours accumulate every shift.
9. Put it in one table, per area, per cycle
One row per area, columns for the current method and the steam method, and the same fields in both: labour hours per cycle, kilowatt-hours per cycle, litres per cycle, chemicals per cycle, run-off or interceptor impact, hours out of service, cycles per year, and inspection failures. Annualise by multiplying by cycles per year. Add the installation cost and the annual maintenance allowance to the steam column. This is the format a purchasing committee can read, and the format that exposes a weak assumption when someone challenges it.
Where the two methods are close, the deciding line is usually availability rather than consumables. That is the line most facilities fail to measure, and the one that so often reverses the conclusion.
10. Run the trial that produces the numbers, not the promises
Choose one area with a known heavy deposit and the best services on site. Run the existing method and the steam method on comparable surfaces, timed by the same person, with kilowatt-hours and litres logged. Photograph before, after, and seven days later. Two weeks of that data gives you a cost model built on your own tariffs, your own wages and your own deposits — figures no supplier's datasheet can replace and no procurement challenge can dismiss.
If the trial shows that the machine you need is not the catalogue configuration — a different tank size, a different duty cycle, a different accessory set for your layout — customized steam cleaning equipment can be specified around the site instead of chosen from a range. Each machine in the Cleaning Equipment Series is published with its parameter sheet, and Shenzhen PowerDe Automation Precision Equipment will build a specification against your utility loads and shift pattern. Send the trial sheet to the contact page and ask for a configuration quotation with the duty cycle your own data shows, not a standard product page.
