“Chemical degreasing is cheaper.” “Steam pays for itself.” Both claims get made in supplier conversations, and neither one survives contact with a real kitchen. The honest answer is that the two methods are not a single competitor fighting over a single job: a restaurant kitchen contains many degreasing tasks, and each task has its own soil, its own time window and its own surfaces. This article walks through how to build a comparison that ends in a written, task-by-task decision instead of a slogan.
Compare tasks, not methods
Before comparing anything, split “degreasing the kitchen” into the tasks you actually perform. Three representative ones:
- The griddle edge, backsplash and control panels — the surfaces behind most commercial kitchen stovetop degreasing — where a fresh oil film appears during service and thickens into a polymerised film overnight.
- The hood exterior and the first reachable duct section, the task behind most commercial range hood grease removal bookings, where baked-on grease sits hard enough that a cloth moves it around rather than removes it.
- The floor around drains and the edges under tables, a mix of dropped grease, foot traffic and standing water.
Each task has a different soil condition, a different available window (a gap between services, after closing, a slow weekday), and different materials. A method that wins on the griddle edge can lose on the hood, and both can be wrong about the floor. A comparison that produces one winner for “the kitchen” is a comparison that never looked at the tasks.
Write down what each method actually consumes
Put two columns on paper and fill in every recurring item, not just the purchase price.
The chemical degreasing column should list: detergent cost per diluted litre, and the dilution discipline behind it — too weak and the crew scrubs more, too strong and you pay in rinse water and residue; dwell time per application, and the scrubbing time that follows when the film has polymerised anyway; rinse water, and how the crew confirms rinsing is complete; personal protective equipment, storage and training for handling concentrates; and where the emulsified grease goes — it leaves with the rinse water, and what your trap can take is a matter for the grease pump and your local drainage authority, not the detergent label.
The steam column should list: the machine itself, plus the energy required to raise water to working temperature; tank water, refill distance and the drainage routine; dwell time, because heat softens polymerised grease rather than blasting it off, so the crew still wipes; descaling and maintenance, which depend on your water hardness; operator training, heat protection, and drying and condensation management in the room; and the fact that there is no detergent residue — but also no detergent record, which changes what your audit file looks like.
Neither column is empty. The two methods mostly trade one cost for another: chemicals trade purchase price and rinse water for labour on old grease; steam trades energy and maintenance for less scrubbing and less rinse water. A comparison that lists only the purchase price has decided before it started.
Measure in your own kitchen, not on someone else's claims
The only numbers that describe your kitchen are the ones you take yourself. Choose one surface per task, treat half of it with one method and leave the other half as reference, and record:
- Minutes from start until the surface is dry and back in service — drying belongs to the task, not to the cleaning.
- The number of apply-and-wipe or steam-and-wipe cycles needed before the soil is gone rather than moved.
- Rinse water in buckets or measured flow — whichever your kitchen can actually count.
- A next-morning recheck: flash rust on bare metal, a film that re-deposited as it cooled, an odour coming back from a drain.
- A fixed reference photo of each half, taken from the same angle, before and after.
Run the same half-and-half on a second day before deciding anything. One good or bad day tells you about that day; two consistent days tell you about the method. Do not import industry averages or a supplier’s demonstration result: your crew, your grease and your time window are the system being measured.
Note what each method leaves behind for the inspector
Food-service audits reward evidence, and the two methods leave different evidence.
- Chemical degreasing leaves a familiar paper trail: safety data sheets, dilution and contact-time records. Its weak points are residue and demonstrable rinsing.
- Steam leaves no chemical record at all. Your evidence becomes the cleaning log, the verification checks you performed, and the fact that nothing was left behind to rinse. Be ready to explain that difference rather than hope no one asks.
Neither method proves a hygiene result on its own. Whether a surface is safe is decided by your own food-safety verification — swabs, ATP or whatever your plan uses — not by a claim borrowed from a cleaning method or a machine.
Where these comparisons usually go wrong
- Comparing steam against fresh grease. A fresh oil film comes off with warm water and detergent; that is the daily task. Heat earns its place on the polymerised film and baked-on deposits that detergent and effort only move around.
- Comparing chemicals against a carbonised crust. No degreaser removes thick carbon quickly. If the task includes a crust, the comparison must include a mechanical step first, whichever method wins the rest.
- Ignoring the time window. A method that needs more time than the gap between services cannot be scheduled in that gap. Measure the real window — cooling, protection, cleaning, rinsing, drying and checking — before matching any method to it.
- Ignoring the drain. Both methods send grease and water to the same drain. What your interceptor can take and what your local drainage authority requires are conditions of the comparison, not footnotes.
- Comparing beyond scope. The upper duct run, the inside of the fryer’s oil lines and the interceptor itself are outside both methods. Put them in the contractor column so they stop distorting the result.
Turn the measurement into a written decision
Finish the comparison with one line per task, not one verdict for the kitchen:
- The task, and the method chosen for it.
- The conditions of use: dilution or steam mode, dwell, tool, who performs it and in which window.
- How completion is confirmed: angled light, an agreed white-cloth wipe, a fixed reference photo.
- The review trigger: a menu change, new equipment, a new crew member, or the same finding appearing twice in the log.
Most kitchens that finish this exercise assign both methods: detergent for fresh soil in the daily routine, heat — steam or hot water — for the periodic polymerised film, and a contractor for the ducts and the interceptor. That is not indecision; it is what the tasks actually look like when they are compared honestly.
Before you buy: what to ask the equipment supplier
If the comparison points toward buying heavy grease removal equipment, take these questions to the supplier with your own records attached:
- Which surfaces and soil types the machine is actually listed for, and whether your kitchen tasks are inside that list.
- The steam temperature and pressure, and whether they are measured at the boiler end or at the gun end. For saturated steam, temperature and pressure are two readings of the same state, and a long hose changes what actually arrives at the surface.
- Tank capacity, duty cycle, warm-up and recovery time, and what a refill actually interrupts during a service night.
- Hose and lance lengths, accessories, wear parts, training, warranty, and who owns descaling in your water.
Learn to read the datasheet for what it is. A temperature and pressure pair describes how fast heat can soften polymerised grease — not how fast your job finishes. Tank capacity and water inlet describe your duty cycle and refill radius. Built-in protections protect the machine; your electrician still checks the circuit, and your staff still need protection from heat. For example, the datasheet of the PowerDe HW02 fixed steam cleaning machine lists 160 °C steam temperature, 0.8 MPa vapour pressure, 6 kW heating power, an 80 L SUS304 tank with tap-water inlet, 220 V operation and switchable dry and wet steam. Its product page lists vehicle exterior cleaning, interior vacuuming and engine-compartment cleaning, so a restaurant should confirm kitchen use with the manufacturer in writing before treating it as kitchen equipment.
The comparison is finished when it is written down
A restaurant that compares steam and chemical degreasing task by task, prices both columns honestly, measures in its own kitchen and writes the result down does not need either slogan. It ends with a dated decision sheet that anyone on the crew can read — and with records good enough to send a supplier instead of a brochure. If you want written answers on kitchen suitability, duty cycle and accessories before comparing machines, contact PowerDe and attach your task list and measurement records.
