Name the soil before you compare machines
A machine-shop floor is not dirty in one way. It carries cutting fluid and oil, metal swarf, grinding fines, and whatever the vehicles track in. Each behaves differently: oil spreads, swarf cuts, grinding fines turn to paste with water. Write down what is actually on your floor and how it got there, because that answer decides whether you need heat, pressure, volume, or a squeegee and a mop. Comparing machine specifications before naming the soil is how buyers end up with the wrong machine and a floor that is still slippery.
Map the floor into zones, then time each one
Do not treat the shop floor as one area. Split it: the machine-tool frontage, the gangway, the area around the swarf bins, the door thresholds, and the corners and wall junctions. Time one cleaning pass in each zone with the method you are testing. The timing usually shows that the cost is not the cleaning itself but the movement between them, and that the missed zones are the ones nobody times — the corners and the areas behind machines that cannot be moved.
Ask how much water each option leaves behind
On a shop floor, water is a problem twice: it has to be removed, and it carries oil to a drain that may not be allowed to take oil. Ask each supplier how much water their method applies per square metre and how long the floor takes to be walkable again. High-temperature steam is worth asking about precisely here, because it delivers heat with far less water than a hose, so there is less to squeegee and the floor returns to service sooner. A machine such as PowerDe's fixed and mobile steam cleaning equipment works on that principle; the HW02 fixed unit switches between dry and wet steam, so the wet pass lifts the oil film and the dry pass finishes the surface with minimal residual water.
Ask what each option needs from the building
Every option has site demands, and they are where hidden cost lives. A fixed machine needs the right supply, a water inlet, drainage, and a position that does not block a gangway. A mobile battery machine needs a charging place and a refill point. A machine with a long hose needs a route that stays clear of traffic and hot surfaces. Put these demands on the comparison sheet as installation cost, not as an afterthought.
Ask how the machine behaves around real shop-floor obstacles
Bring the obstacles into the comparison: swarf on the floor, cable trays, oil-drum storage, a mezzanine stair, a door that a loaded machine cannot pass. Ask the supplier directly whether their unit's wheels, hose length and body size work on that floor, and ask what the protections do when something fails — PowerDe's equipment pages list leakage, short-circuit, high-temperature, high-voltage and water-shortage protection, which is the kind of list an operator needs explained, not just printed.
Ask what the run-off costs you
Oily water from a shop floor is a liability, not just a mess. Before comparing machines, establish where the floor drains go, whether an oil separator is fitted and what it costs to service, and what your site is permitted to discharge. Then price each option against that constraint: a method that uses less water per session loads the separator more slowly and reduces the volume of contaminated water you pay to dispose of.
Trial both on the same zone, on the same day
The only comparison worth trusting is a side-by-side trial on identical soiling. Mark out two equal zones, clean one with each option, and record the same three numbers for both: minutes of labour, water used, and the time until the floor was walkable. Ask PowerDe, which builds both fixed and mobile steam cleaning machines, what configuration its engineer would pick from your own trial numbers — send the zone sizes, the soil description and the drainage situation through the contact page.
