Measure the frame before choosing the machine
Write down the real geometry of the cooking equipment you intend to clean. For each item: overall height, the depth of the frame or carcass, the height of the legs or plinth, the gap between the rear of the unit and the wall, and whether the side panels come off. A freestanding fryer on 100 mm legs behaves completely differently from a griddle built onto a sealed plinth, and only the first one lets a machine roll close enough to work the lower frame.
Then measure the route to that equipment, not just the equipment itself. Kitchen aisles are usually the binding constraint. A mobile unit has to travel from its water inlet and power point to the job, so the narrowest doorway, the turning space at the corner of a line, and the gap between two benches all set the maximum size of machine that will ever reach the frame.
Match footprint, weight and wheels to the route you measured
Compare the measured aisle against the machine's dimensions, including anything that sticks out: handles, hose reels, the wand bracket. A fixed unit such as our Fixed Steam Cleaning Machine PowerDe HW02 occupies about L1200 × W800 × H1200 mm including handles with an 80 L tank full of water. That is a machine with a home, not a machine you wheel between fryers every shift.
For work that moves along a line, a hand-pushed or driven unit from the cleaning equipment series is usually the better fit. The hand-pushed hand-pushed steam cleaning machine HMW3 is listed at roughly L1150 × W520 × H1030 mm with a 50 L clean-water tank and a 48 V battery supply, and it runs on dry and wet steam. The narrower 520 mm width is the number that matters in a kitchen: it is what lets an operator push the unit down the gap behind a cooking line instead of leaving it in the aisle and stretching the hose.
Check wheel material and diameter against the floor. Kitchen floors have drains, expansion joints and a film of water and oil. Small hard castors skid and pick up debris; larger wheels with a softer tread roll over a drain grating without stalling. This is a specification detail worth asking the supplier about directly, because a machine that cannot be pushed when the floor is wet will not get used.
Decide between battery and mains before you look at cleaning power
A mains-powered mobile machine is limited by cable length and by where a suitably rated outlet exists. Dragging a 220 V supply across a wet kitchen floor past a service aisle is the usual reason a cleaning job gets abandoned halfway. A battery-supplied unit removes that constraint, which is why the driven models and the HMW3 work on 48 V battery supply.
Battery power moves the constraint instead of removing it: you are now limited by run time and by charging. Ask for the battery capacity, the expected working time per charge and the charger output, then compare against the length of one cleaning session on your equipment. If the frame-cleaning task is a weekly deep job of forty minutes on a line of fryers, the runtime figure decides whether you need one machine or a charge-and-swap routine. Where a mains unit is unavoidable, have an electrician confirm the circuit and put the outlet where the machine actually works.
Steam mode, temperature and what the frame actually needs
Cooking-equipment frames fail in two different ways: baked-on carbonised grease on the exterior panels and splashes, and accumulated grease in the seams, corners and under the worktop lip. Dry steam is the better choice on a hot, greasy panel because it carries less free water, lifts the deposit with heat, and leaves the surface close to dry. Wet steam suits thick, cold, hardened deposit that needs water and heat together. A machine that switches between both modes covers both jobs; a single-mode machine commits you to one.
Ask for the steam temperature and delivery pressure, and work out what reaches the frame after the hose. Published figures for the HW02 are 160 °C at 0.8 MPa; the HMW3 is described as high-temperature and high-pressure with a 4.5 kW PTC heater, and its exact steam temperature and pressure are not published on the product page, so request those figures in writing before you commit to a model for heavy frame work.
Protect the equipment you are cleaning
A cooking frame contains the parts that must not get wet: the gas valve and burner assembly, the igniter, the thermostat and control knobs, the fan motor of a convection oven, terminal blocks, and any electrical enclosure mounted on the carcass. Before steaming, remove the knobs and seals where the design allows, cover the burner area and terminals, and keep the lance away from any opening in the frame.
Confirm with the equipment manufacturer which parts of the frame tolerate steam, and record the answer. Where the manufacturer says no, clean that area with a cloth and an approved detergent and use steam only on the accessible panels. Steam under a worktop lip or into a burner compartment can leave an appliance safe to touch but unsafe to light.
Run-off, drainage and the floor after the job
Steam released onto a frame runs down the carcass, picks up the grease it has loosened, and lands on the floor. Where the frame sits on a sealed plinth, the run-off collects at the base and has to be lifted away with absorbent material or a wet vacuum, and the machine's position in the kitchen determines whether that is a two-minute task or a fifteen-minute one.
Plan for the run-off before the first pass: identify the nearest channel drain, confirm the trap is clear, and barricade the floor until the steam film has dried. Textured floor that has been steamed stays slipperier than floor that has been mopped, because the heat drives moisture into the surface profile.
Water supply, tank size and the refill cycle
Tank volume sets how far you can work before refilling. A 50 L tank on a mobile unit is enough for a long session, but the refill still has to happen somewhere with a tap and with room to stop the machine. Check the inlet connection too: the HW02 uses mains tap water through a 4-point internal-tooth 1/2 inch joint, and the same style of fitting on a mobile unit decides whether you can top up at an existing kitchen tap or need a dedicated point.
Tank material matters in hard-water areas, where scale on the heating element is the usual cause of a machine losing output in its second year. SUS304 stainless on the fixed unit is a start; ask what the mobile models use and what descaling interval the supplier specifies for your water hardness.
Accessories that decide whether the frame is reachable
The nozzle set decides what a mobile machine can actually reach. Under a griddle frame and behind a fryer you need a lance long enough to keep the operator's hands away from hot surfaces, a narrow jet for seams and corner profiles, and a wider or brush-type head for flat panels. Ask what is supplied as standard and what is optional, and confirm the hose length, because hose length plus machine position is what determines whether the rear frame of an appliance can be cleaned without moving the appliance.
Some mobile units also carry a vacuum function, which lets an operator lift loosened residue instead of pushing it across the floor with water. For cooking-equipment frames that combination is worth asking about specifically.
Service access, storage and the charging spot
A mobile machine needs somewhere to live, and that place has to satisfy three things at once: access to water, access to power for charging, and enough clearance to open a tank or a service panel. Decide where the tank drains, because a unit filled with 50 L of hot water has to be emptied somewhere that is not a food-prep area.
Then set a maintenance routine: check the hose and couplings for wear, confirm the safety devices the manufacturer lists still trip, and log each descale and each service. A mobile unit takes more physical abuse than a fixed one, so the maintenance record is what tells you whether a hose is due for replacement before it fails under pressure in a kitchen.
A fit check before the order
Before you buy, take the measurement sheet into the kitchen and confirm:
- The machine's width and length, including handles, pass the narrowest point on the route to the equipment.
- The wheels and turning circle work on a wet kitchen floor with drains in the path.
- Battery runtime covers one full session, or a rated 220 V outlet and circuit exist where the work happens.
- Steam temperature and pressure at the nozzle are stated for the model, not just for the range.
- The accessory set and hose length reach the rear and underside of the frame.
- Burners, terminals and controls have a written protection method before steaming.
- A drain, refill point, charging spot and storage place with service clearance are all identified.
If any of those fails, change the machine or the layout before the machine arrives — a mobile unit that cannot reach the frame is fixed equipment with wheels.
