A facility that runs, or is about to run, a machine with a dry and wet steam switch eventually stops asking whether the machine cleans and starts asking a quieter question: what does it actually cost us to work in the dry setting? That question deserves a ledger rather than an impression. Operating cost is not printed on any specification sheet. It is the sum of things the site already pays for: electricity at your tariff, water and its disposal, crew time, the hours an area stays out of service, and the parts and maintenance that keep the machine running.
The dry setting changes the shape of that ledger. It does not change the size of the heater, the price of water or the wage rate. What it changes is where the money sits. Some lines shrink, one line grows, and the totals only become visible when each line is measured separately. A facility that measures gets a decision it can explain to a finance team. A facility that guesses gets a machine it cannot justify six months later.
The sections below build the ledger line by line: what the dry setting actually does differently, how to read a published data sheet as a list of cost drivers, how to measure energy, water, labor, time out of service and consumables with your own crew and your own meters, and how to turn the result into a cost per task you can compare honestly against the method you use today.
Every equipment figure quoted here is taken from the published PowerDe product pages. The page used as an example lists vehicle cleaning among its uses rather than general facility work, so its suitability for facility surfaces is treated throughout as a question for the manufacturer, not as a claim. Your own tariff, water bill, crew rates and local drainage requirements supply the prices. This article is about the method of counting.
What the dry setting actually does differently
The cleaning energy of any steam machine comes from the same physics: steam condenses on a surface cooler than itself and releases the heat it carried. A wetter setting adds hot water on top of the steam, which delivers more heat per pass and softens stubborn soil faster, and it leaves more water behind. The dry setting delivers steam with less entrained moisture. It wets less, forms less condensate, and puts a smaller water load on the room.
That difference has two cost consequences, and an honest ledger carries both. The first is favorable: less condensate means less to drain, wipe or wait out, less shielding around nearby electrical equipment, and a shorter path from finished cleaning to area released. The second is not: because each pass carries less heat to the surface, a thick or polymerized deposit may need a slower travel speed, a shorter working distance or repeated short passes. The work does not disappear. It moves from the drying column into the labor column.
This is why the switch between settings is best understood as a control over the cost profile rather than a quality dial. Near a control panel, or in the last stretch before an area reopens, the dry setting is buying time that would otherwise be paid for in waiting. Against an old grease film on an open floor with a drain nearby, the wetter setting may finish the soil in fewer passes. A facility that treats the two settings as interchangeable will produce a muddled ledger and then blame the machine.
Read the data sheet as a list of cost drivers
The PowerDe HW02 fixed steam cleaning machine listing gives a steam temperature of 160 degrees Celsius, a vapor pressure of 0.8 MPa, a heating power of 6 kW, an 80 L SUS304 tank, a tap-water inlet with a 1/2-inch internal-thread fitting, dry and wet steam modes with a vacuum cleaner, and a working voltage of 220 V. Read as marketing, those numbers say nothing about cost. Read as engineering, each one points at a line in the ledger.
The temperature and the pressure are two readings of one saturated state, not two separate capabilities, and neither says what arrives at the surface once a long hose and a wand are fitted. The heating power and the voltage describe the energy line and the dedicated-circuit question your electrician has to answer. The tank capacity and the inlet describe the water line and the refill walk: how long the machine works before someone walks to a tap, and how far. The mode switch is the water-load decision described above.
The figures that would complete the ledger are not on the page. That is not an oversight to argue with; it is a list to send. Warm-up time, how long one tank supports continuous output in each setting, how long recovery takes after a refill, the steam output rate, and the hose and wand lengths are the numbers that turn a 6 kW nameplate into a cost per task. Ask for them in writing, or measure them on the first day and write them down yourself. A ledger built on assumed numbers is a brochure with decimals.
The same listing describes vehicle exterior cleaning, interior vacuuming and disinfection, and engine-compartment cleaning. It does not list the machine panels, kitchen surfaces, floors or fixtures a general facility would put in scope. Before any figure on that page is used to justify a purchase for facility work, the surfaces, the materials they are made of and the water quality the machine expects should be confirmed with the manufacturer in writing.
The energy line
A 6 kW heater is a maximum, not an average. On a machine with a pressure control, the element cycles on and off once the generator reaches its working state, so the honest way to price the energy is to measure it rather than to multiply the nameplate by the clock. A plug-in energy meter on the outlet gives the whole story in one shift, including the quiet cost of a machine left energized between tasks. Holding a hot generator ready is itself an energy decision, and if the crew leaves the machine on from the start of the day because nobody planned the warm-up, that standby belongs in the ledger too.
Compare the two settings per task, not per minute. The heater draws similar power while producing steam in either mode, so the energy difference between settings comes from how long each one takes to finish the job. If the dry setting needs two passes where the wetter setting needs one, the extra minutes are energy. If the dry setting lets the crew skip a drying step, the minutes it saves are energy too. Only a timed task shows which case you are in.
Multiply the measured kilowatt-hours by your own tariff and the line is closed. Do not borrow anyone else's rate. A plant on a time-of-use tariff and a plant on a flat rate will price the same shift differently, and that difference is real.
The water line and the disposal line
The tank holds 80 L and the inlet is ordinary tap water, so the water line is easy to count: refills per task, times 80 L, plus whatever water is used for rinsing and wiping that the machine does not control. The page does not publish a steam output rate, which is exactly why the refill count is the measurement to use. It is a number your own crew can produce on an ordinary day, and it differs between settings in a way no brochure figure will tell you.
The purchase price of the water is rarely the interesting part. The interesting part is disposal. Warm runoff carries loosened oil, grease or food soil toward a drain, and what your site may discharge, at what temperature, carrying what, is decided by the local drainage authority and by any interceptor your site operates. A drier setting produces less runoff to manage, which shows up as fewer floors to squeegee, less to intercept and fewer questions at the drain. Count it as a line even if the utility bill barely moves. The cost hides in the labor and the permits, not in the price of the water.
The labor line
Nobody pays for spray minutes. The crew is paid for the whole elapsed job: warm-up, moving and shielding what must not see steam or water, the work itself, the refill walk, waiting for pressure to recover, wiping, drying checks and the inspection that releases the area. The labor line is that total, and it is the line most often misread when a facility compares methods.
The dry setting shifts labor around rather than removing it. Expect more working time on heavy soil, in the form of slower passes, a closer working distance or a second pass, and expect less time spent on water: less squeegeeing, less mopping, less standing in a room waiting for a floor to carry foot traffic again. Whether the total goes up or down is exactly the question the measurement answers. Time the segments separately, because a total alone will not tell you which half of the trade you actually got.
The refill walk deserves its own entry, because it is labor that repeats. Where the machine stands, how far the hose reaches from there, and where the nearest tap is decide how many minutes per task disappear into a corridor. A longer supply hose or a water point at the work position is usually cheaper than the wages it saves, and it is the kind of saving a per-task ledger makes visible while an hourly rate hides it.
The line most facilities actually pay for
For many facilities the largest cost in a cleaning task is not the cleaning at all. It is the time the cleaned thing stays out of service: a wash bay holding a vehicle that could be back on the road, a machine panel that cannot be energized, a kitchen line that cannot reopen, a corridor closed to foot traffic. That cost is real, it is often the largest number in the room, and it almost never appears in an equipment conversation.
The dry setting's advantage concentrates here. Less condensate means a shorter path from the last pass to a signed-off, usable area. Measure it explicitly: the clock starts when the last pass is made and stops when the person responsible for reopening the area says it may reopen, meaning the floor is walkable, the panel is dry enough to energize, and the seams are checked. Compare that interval between settings, and against the current method, on the same surface, with the same crew.
A facility whose real constraint is bay occupancy may find that a mode costing slightly more labor still wins, because the asset behind the cleaning returns to service earlier in the shift. A facility whose constraint is heavy soil on an open floor with good drainage may find the opposite. The measurement is how you find out which facility you are.
Consumables, maintenance and the limits of built-in protection
The small, certain costs belong in the ledger too: nozzle tips and seals treated as wear items, descaling at the interval your water actually demands (the page says the machine takes tap water, and tap water differs from site to site, so the interval is yours to observe and record), the personal protective equipment the task requires, and the spares you choose to keep on the shelf. Ask the supplier for a consumables list with part numbers before the first order. A machine whose wear parts are anonymous is a machine that will be down while somebody hunts.
The protections named on a product page, the electrical and pressure safeguards listed there, protect the machine. They do not assess your circuit, they do not notice a wet floor, and they do not stand between a person and a hot nozzle. A low-water stop in the middle of a task is not a fault to be reset and forgotten. It is a schedule event that says the plan was longer than the tank. Read it that way in the ledger, and the fix is a water point or a planned refill rather than a repair.
Turn the lines into a cost per task
Add the lines for energy, water and disposal, labor, time out of service, and consumables and maintenance, then divide by the task rather than by the hour. The unit should be the thing your operation actually cares about: one vehicle, one machine's worth of panels, one floor bay, one hood. A cost per hour flatters whichever method is slow, because it prices the clock rather than the result. It is also the only form in which industrial steam cleaning equipment from two different suppliers can be compared honestly: the machine that finishes the unit cheaper wins, whatever its hourly rate looks like.
Then compare against what you do today, on the same task, under the same conditions. Half a surface done the current way and half with the machine, same crew, same starting soil, photographed from a fixed point, with the areas checked again the next morning for water that has moved into seams and under equipment legs. Record one row per surface rather than one row per room, because a room-level average hides the fixture that failed and the one that should never have been attempted.
The decision rule falls out of the arithmetic. If the dry setting's ledger beats your current method on the unit you care about, adopt it for the surfaces where it wins and extend carefully. If it loses, the honest answer may be a split routine that uses the wetter setting for the soil and the dry setting for panels and for the last stretch before reopening, or a different machine form, or a different method entirely. A ledger that says no is doing its job as well as one that says yes.
Measure one day before you decide anything
Two representative tasks and one shift with your own crew are enough to start. Write the acceptance wording before anyone opens a valve: what a finished surface looks like, how it is checked, and who signs. A cost comparison without a definition of done compares two different jobs. Run the energy meter, count the refills, time the segments, time the interval to reopening, and write down the waiting as well as the working.
The record sheet needs no special form: task, surface, setting used, start and stop for each segment, refills and the distance walked, meter readings, time to reopening, and the verification result. One row per surface, and one line for anything that surprised the crew. Send that record, rather than a summary, to whoever you are talking to. It turns vague questions about a dry and wet steam cleaner into specific ones (the output rate in each setting, the warm-up time, how long one tank supports continuous work, the hose lengths), and it puts your real conditions, not a demonstration, in front of the person answering.
A facility that can state its cost per task in the dry setting, in its own numbers, is no longer comparing machines. It is comparing outcomes, and it can say which surfaces the mode is for, which it is not, and what would have to be true for the answer to change. That is the difference between a purchase that survives its first audit and one that does not.
Send the task list, the surface descriptions, the measured segments and the figures you could not find published to the contact PowerDe team, together with the surfaces you want confirmed in writing. A conversation that starts with your records ends with a written answer. A conversation that starts with a brochure ends with a promise.
