What happens to the wash-water on this site
Ask whether the range line sits over a drain with a grease trap, and whether the site permits detergent-bearing discharge to it. Sites with that arrangement can support hose-based washing and the comparison is about labour and time. Sites without it push you towards methods that use little liquid per surface, because every extra litre becomes a handling problem on the floor and a compliance question at the drain.
Get the answer from the facilities operator rather than from the kitchen manager. "You can wash here" and "wash-water with degreaser may enter this drain" are different permissions, and the second one is the one that matters for a range line.
Which part of the range are you actually comparing
A range line is several different jobs: the griddle and hot-plate tops, the splashboard and gaps between units, the oven doors and handles, the hood filters and the floor and wall tiles around the line. Each holds a different soil — burnt-on film on hot surfaces, greasy aerosol deposit on vertical splashes, and airborne grease on the hood. Methods that clear a griddle surface do not automatically clear a filter, and comparing one machine against "the alternative" across all of them produces a misleading answer.
Break the line into those items and time one night's clean by item. That timing, not a supplier claim, is the number you compare methods on.
What the equipment needs that the kitchen may not have
Two constraints decide most comparisons: power and water. A central commercial kitchen degreasing machine running at 6 kW on a 220 V supply needs a circuit that can carry it for the length of the shift, and a machine with an 80 L tank needs refilling somewhere that does not mean dragging hoses across a serving area. Ask what the supply voltage, heating power, tank capacity and inlet connection are, then check them against the room.
Portability is a second-order constraint that becomes first-order in a tight kitchen. Hand-pushed and battery-supported units move between the range, the hood and the back-of-house floor without re-routing cables over a wet surface.
What happens to the surfaces afterwards
Scraping and harsh alkaline products leave their mark on aluminium trim, painted panels and grout lines; high moisture loads get into door seams and insulation. Ask each supplier to state the working temperature and pressure of their commercial range hood grease removal approach and test it on one range and one hidden edge before it goes across the line. Documented protection functions — leakage, short-circuit, high-temperature, high-voltage and water-shortage — also make the method easier to write into a site risk assessment.
Comparing on total effort, not on the machine
Put the same four columns against every option: labour-hours per night, litres used per night, consumable chemicals, and any rework you are already doing (filters replaced early, panels corroded, floors re-sealed). A method that looks cheap per machine but costs two extra hours a night and a shortened equipment life is not cheap.
Send your drain arrangement, your cleaning window and your item-by-item timings to PowerDe cleaning equipment and ask which mode — dry steam, wet steam or hot water — they recommend for each part of the range line, and what consumption they expect on your figures.
