Ask two kitchens the same question about grease filters and you will get two different answers, because each one is describing the hood it actually runs. A coffee shop's filter load is not a charcoal grill's filter load, and the cleaning equipment that suits one is the wrong size and the wrong heat for the other. The questions below are the ones that separate a machine specification that holds up from one that gets abandoned after three months.
1. What is on the filter, and how long has it been there?
Fresh splatter behaves nothing like filter mesh that has been baking for eight weeks. Soft, recent grease lifts with heat and a short dwell. Polymerised grease — the hard, tar-like layer — needs sustained heat, the right nozzle distance, and usually a second pass. Before you compare any two machines, describe the soil you are actually removing and ask whether the unit is offered for that job. A supplier page that lists light surface cleaning will not support a heavy, neglected filter without a longer cycle and more operator time.
2. What heat and pressure does the machine actually deliver?
Ask for the steam temperature, the working pressure, the heating power and the tank volume, and ask whether the unit holds those figures through a full shift or drops them as it works. These are the numbers that decide whether a filter clears in one pass or three. The published figures for the Fixed Steam Cleaning Machine PowerDe HW02 are a 160° steam temperature, 0.8 MPa vapour pressure, 6 kW heating power and an 80 L SUS304 tank on a 220 V supply, offered with dry-steam and wet-steam modes. Write those figures into your comparison sheet and put the competing machines against them line by line rather than trusting a brochure headline.
| Spec to request | Why it decides the comparison |
| Steam temperature | Sets how fast hardened grease softens; low temperature means long dwell and more labour. |
| Working pressure | Sets how much of the loosened soil is pushed out of the mesh instead of smeared across it. |
| Heating power and tank volume | Sets how long the machine works before it stalls for a refill or recovery; these two drive shift throughput. |
| Mode choice (dry steam / wet steam) | Dry steam suits grease lifting with little runoff; wet steam and hot water flush the residue out. |
| Voltage and utilities | A machine that needs a supply your kitchen does not have is not an option, however good the rest of it is. |
3. Where in the building does the cleaning happen?
Filters do not clean themselves in the air. Decide whether the work happens in a yard, a back alley, a dedicated wash bay or a corner of the prep area, because that decision sets the machine size, whether it needs wheels, how the runoff is contained, and how far the hoses have to reach. Ask each supplier what containment their machine assumes, and check it against what your site can actually provide. Runoff from filter cleaning carries grease and grit, and it must not go straight into a yard drain.
4. How long does one filter take, start to finish?
This is the question a comparison sheet usually leaves out, and it is the one that decides the real cost. Ask the supplier to watch the machine clean a filter from your own kitchen, and time it: spray, dwell, agitation, rinse, drying, and refitting. Add the handling time — carrying the filter, moving the machine, refilling the tank. A machine that is slower per filter but needs no chemical dwell and no second rinse can still be the cheaper option once you write the whole cycle down.
5. What happens to the filter mesh, and what does the warranty say?
Heat and pressure that clear grease can also bend a thin mesh, lift a braze joint, or drive grease deeper into a fine screen if the operator works too close. Ask for the recommended working distance and the mode order for filter mesh, and ask what the warranty excludes. Then run one filter that is already at the end of its life, photograph it, and run a second one you can inspect afterwards. That test costs an hour and tells you more about the machine than any specification sheet.
6. What does the machine need between jobs?
Tank draining, descaling where the water is hard, hose and nozzle inspection, filter cleaning on the machine's own intake, and a place to store it so it does not become an obstacle in a working kitchen. Ask what the maintenance schedule is, what wears out, and what a replacement part costs and takes to arrive. A machine with cheap, locally stocked consumables usually beats a marginally better machine with parts that take three weeks.
7. Who records the work, and against what standard?
Filter cleaning ends up in a fire-safety conversation, so the record matters as much as the result. Ask what the machine and the procedure let you log: date, hood and filter identifiers, the method used, who did the work, and what was found. Check that the record format matches whatever your insurer, landlord or fire authority expects. A cleaning method that cannot be documented is a method that will be questioned.
Send the same seven questions to every supplier you compare, and put the answers in one sheet. Ask each of them for the recommended operating procedure for commercial range hood grease removal, naming your own filter type and load, and ask them to state plainly which parts of the job their machine is not offered for. The supplier who answers that question directly is usually the one worth continuing with.
