Stainless steel is the default material across commercial kitchens: worktables, sinks, splashbacks, hood housings, trolley frames and equipment panels. It survives water, heat and repeated wiping, yet it also shows every grease film, water mark and detergent residue. When a kitchen team starts comparing cleaning machines, the conversation usually stalls at the brochure: almost every supplier promises "high temperature" and "high pressure". The useful conversation is different. Buyers who are specifying for a canteen servery, a central kitchen or a hotel back-of-house should compare machines through the questions below, because those questions map directly onto the surfaces they actually have to clean.
1. Which stainless-steel surfaces are in scope, and how far can the machine reach them?
Stainless steel in a kitchen is never one surface. There are horizontal worktops, vertical panels above cooking lines, overhead hood and duct surfaces, legs and plinths that sit on the floor, and small parts such as handles, hinges and castors. A comparison should start with a written surface list from the site, because that list decides the required hose length, wand type and whether a fixed unit or a mobile unit is practical.
Ask each supplier which surfaces their reference installations actually cover. A machine parked 20 metres from the servery line, with a short hose and no extension lance, will be used on the tables and abandoned on the hoods. If the list includes overhead work, treat reach, hose handling and the availability of extension accessories as a hard specification item, not an option to be resolved later. PowerDe's engineering services team handles customised configurations for this kind of site-specific reach problem, and that request usually starts with a surface inventory rather than a model number.
2. What does the machine do to grease that has already hardened?
Fresh splatter wipes off. Grease that has been heated, oxidised and left for a week turns into a film that scrubbing smears rather than removes. This is where the comparison should focus on energy delivered to the surface: steam temperature, whether the machine can run dry steam or only wet steam, and whether the operator can switch between modes.
Dry steam carries heat with far less free water, so it softens the film without flooding the panel and without leaving run-off across a clean floor. Wet steam and hot water flush the softened residue away. A machine that only produces one mode forces the operator to change method mid-task, which is when corners get cut. Fixed installations such as the central commercial kitchen degreasing machine category are specified precisely for this sequence: heat the film, then remove it, on the equipment itself instead of on a soak bench.
For a fair comparison, ask suppliers to demonstrate the machine on a used grease sample from your own kitchen, not on a clean test panel. A demonstration on a clean surface tells you nothing about the film you actually have.
3. Can the method reduce chemical use in a food area?
Degreasing chemicals work, but in a food-preparation area they add steps: dosing control, contact time, rinse verification, storage, and disposal records. Buyers frequently underestimate the cost of those steps, and they are a large part of the real comparison. High-temperature steam and hot water do most of the work thermally, which lowers dependence on strong detergent, reduces rinse burden on stainless surfaces, and shortens the window between "cleaning finished" and "cooking restarted".
Put the question in operational terms when comparing machines: how much detergent per shift, how many rinse passes, and how long the area is out of service. If a supplier cannot answer these, they have not costed the process — they are selling a machine.
4. How much water and how much run-off does the process create?
Hosing a stainless worktop sends water down the panel, onto the floor and into the gully. Grease-laden run-off then has to be managed, and in a servery with an open floor it slows the whole cleaning shift. Steam-based cleaning uses a small tank and delivers most of the effect as heat, so water handling becomes a smaller design problem. That matters more in retrofitted kitchens than in new builds, because drainage capacity and floor falls are usually fixed.
Useful comparison questions here are specific: tank capacity, whether the machine accepts mains tap water, and what the operator does when the tank is empty mid-shift. On the PowerDe fixed units the water inlet is a standard tap-water connection and the tank is stainless steel, which avoids the plastic-tank smell and scaling complaints that show up in older installations. Model-level figures differ between units, so ask for the datasheet of the exact model being quoted and compare like for like.
5. What are the electrical and utility constraints on site?
A 6 kW heater element is not a plug-in decision. Before any machine is approved, the buyer should confirm the available supply, the socket rating and the circuit protection at the point of use, and check whether the kitchen's existing distribution can carry the load during a night clean when other equipment is also running. Compare supply voltage and heating power across the shortlist, and check whether battery-powered mobile units are on offer for sites where cabling across a live kitchen is impractical.
Electrical safety features deserve a specific question in a wet environment. Ask which protections are built in — leakage, short-circuit, over-temperature, over-pressure and low-water protection are the ones that matter for kitchen duty. A supplier who can name them item by item is describing a real product; a supplier who says "fully protected" is describing a brochure.
6. Who will operate it, and what does the shift actually look like?
Kitchen cleaning is done by rotating staff, often at the end of a long shift. A machine that needs a trained technician to start, tune and shut down will not be used consistently. Compare warm-up time, weight, wheel type, hose routing, storage footprint and how the unit moves over a wet, greasy floor with a kerb or drain channel in the way. Hand-pushed units suit tight servery areas; fixed units suit a permanent wash station; driving-style mobile units suit vehicle and forecourt work rather than food areas.
Ask the supplier to walk through a full shift with you: heat-up, task sequence, tank refill, shutdown, and storage. That walkthrough usually settles the comparison faster than a specification sheet, because it exposes the step where operators give up.
7. How is the equipment maintained, and what happens when it fails?
Steam machines fail predictably: scale in the heater, blocked nozzles, worn seals, split hoses. A serious comparison therefore asks what the service interval is, which parts are consumables, what spare-parts stock the supplier holds, and what response time they commit to. A machine that is down for two weeks in a central kitchen does not just delay cleaning; it pushes the site back onto manual scrubbing and overtime.
Water quality at your site drives the maintenance interval, so share it with the supplier before ordering. If the kitchen runs hard water, ask what pretreatment is recommended and how the tank and heater are descaled. The supplier who asks about your water before quoting is the one likely to keep the machine running.
8. Does the supplier understand kitchens, or only machines?
The final comparison question is the supplier's own experience. Ask for reference sites of the same type — school canteens, hospital catering, central kitchens, hotel back-of-house — and ask what those operators changed after six months of use. A manufacturer that builds industrial steam cleaning equipment for kitchens, transport, factories and food plants will answer in terms of process; a trader will answer in terms of horsepower.
Customisation matters more than buyers expect. Niche widths, hood geometry, the distance between the wash point and the cooking line, and whether cleaning happens during or after service all change the right configuration. Customized steam cleaning equipment requests typically start with a survey of the kitchen and a list of surfaces, which is exactly the list you should already have prepared.
A shortlist that holds up
Write the eight questions above into one comparison sheet, send the same sheet to every shortlisted supplier, and score the answers rather than the marketing. Reach, grease handling, chemical load, water and run-off, utility constraints, operator fit, maintenance commitment and site experience will separate the options far more reliably than headline pressure figures. Bring your own soiled sample to the demonstration, bring your floor plan to the quotation meeting, and insist that model-level specifications are quoted in writing for the exact unit you are buying.
If you want that comparison sheet reviewed against your kitchen layout, send the surface list and the utility constraints to the PowerDe engineering team and request a configuration for your site. That is a faster way to reach a defensible decision than comparing brochure numbers across four suppliers.
