What the HMW2 lists, and what an evaluation has to prove
Our driving-style HMW2 mobile machine is listed with three cleaning modes — dry steam, wet steam and hot water — and it is that third mode that separates it from steam-only units in our range. A mode list on a page is not the same as a working method, though. The crews that get value out of the HMW2 are the ones that assigned each mode to a defined stage of the job before the first shift; the crews that get little out of it let the operator choose mode by instinct and end up running one mode for everything. Here is how to evaluate the three modes on your own round so the mode assignment is evidence-based.
The published position, stated plainly
The HMW2 listing describes a mobile active-water cleaning machine with dry-steam, wet-steam and hot-water modes, intended for indoor garages and narrow outdoor parking spaces, with leakage, short-circuit, high-temperature, high-voltage and water-shortage protection. It is offered in two supply versions: the Driving Style Steam Cleaning Machine PowerDe HMW2 (without battery) and the Driving Style Steam Cleaning Machine PowerDe HMW2 (including battery). Anything beyond that — steam temperature and pressure by mode, tank capacity, consumption per hour, runtime on a charge, hose and wand lengths, accessory set — is not stated on the page and should be requested in writing before you build a method on it.
What each mode is for, in operational terms
- Dry steam: heat with comparatively little moisture. Use it on vertical and overhead surfaces, on engine-bay and mechanical areas, and anywhere the surrounding floor or the next job cannot tolerate water. It is the mode that protects a working bay from becoming a lake.
- Wet steam: heat plus moisture. Use it where the deposit is bonded — wheel arches, sills, chassis rails, splash zones, encrusted panels — because the moisture is what softens the bond so it can be lifted rather than scraped.
- Hot water: the pre-treatment stage. Use it to loosen loose grime, salt and soft soil before any steam pass. Steam driven onto a thick loose layer mostly turns it into paste, so the hot-water stage is what makes the steam stage efficient.
How to run the evaluation on your own round
Pick a representative sample of the objects you clean — three vehicles or three bays — and run each mode against the same class of deposit. Measure, rather than observe:
- Minutes per object for each sequence, timed from start to finish including walking and refilling.
- Number of passes needed to reach an acceptable result, per deposit type.
- Water used per object, and how long the area stayed wet afterwards.
- Where the crew stopped using a mode. A mode that is skipped in week two is a mode your method has mis-assigned.
Then write the assignment into the work instruction: which mode for which stage, in which order, with a defined pass pattern. The order that usually works is hot water to loosen, wet steam to lift the bonded residue, dry steam to finish surfaces that must stay dry, and residue collected rather than washed into a drain.
What the evaluation will tell you about the machine choice itself
The numbers you collect answer the bigger question of whether the HMW2 is the right class at all. If the round runs longer than the water and power carried on the machine, the answer may be a mains-fed unit such as the Fixed Steam Cleaning Machine PowerDe HW02 — 220 V, 6 kW heating power, roughly 160°C steam temperature and about 0.8 MPa vapor pressure, an 80 L SUS304 tank, dry- and wet-steam modes and a vacuum function on one machine. If the site is a long shed or a line of bays without a nearby supply point, a hand-push unit may serve better: our hand pushed steam cleaning machine PowerDe HMW3 carries a 50 L clean-water tank with a 4.5 kW PTC heater in dry- and wet-steam modes.
Where the same object sometimes has a supply and sometimes does not, compare the battery and without-battery versions of the driving-style units across our PowerDe cleaning equipment series before standardising a fleet on one of them. Mixed specifications across a fleet make scheduling guesswork.
Turn the evaluation into a document, and let it change the specification
Keep the timing sheet, the pass counts and the water use on one page per object type. That page is what justifies the mode assignment to a new operator, what shows a client why the job takes the time it takes, and what shows you honestly which stage of the round is the bottleneck — usually refilling, waiting for heat recovery, or walking, and very rarely the cleaning itself.
Send us that page along with your round, the objects cleaned per shift and the site's power and water position. We will confirm the mode behaviour, the runtime and consumption figures, and the water inlet arrangement for your site before you order, so the evaluation you ran is matched to a machine actually configured for it.
