Kitchen exhaust ducts collect grease faster than most operators expect. The hood face captures part of the vapour, the filters catch part of the rest, and the remainder travels into the ductwork, where it cools and sticks to the inner surface. A cleaning plan that only covers pans, grills and floors therefore leaves the dirtiest part of the extraction system untouched. A practical plan describes the whole air path and states who cleans each section, how often, with what equipment, and how the work is recorded.
Clean the whole air path, not just the visible parts
Write the plan section by section, in the order the air travels. For each section name the surface, the tool, the crew and the frequency:
- Hood interior, filters, grease cups and the collection tray
- Duct walls, elbows, dampers, access panels and fan casings
- Fans, motors and the discharge outlet, including the bird screen
- The cooking line underneath: range, griddle, fryer, grill, backsplash and floor
This scope matters most where one extraction system serves several appliances, which is normal in a hotel kitchen, a hospital servery, a school canteen or a central kitchen. Grease in a shared duct is not evenly distributed: the first metre beyond the hood carries the heaviest build-up, and horizontal runs collect more than vertical risers. The frequency in your plan should follow that pattern instead of applying one interval to the entire system.
Set frequencies from cooking load and inspection, not the calendar alone
Fixed intervals keep the plan simple, but they need a reviewing mechanism. Set a baseline interval for each section, then inspect the access panels at a fixed short interval — monthly is a common starting point — and record what you find. If a monthly check shows a coating thick enough to be peeled with a gloved finger, the interval is too long. If the panel is clean after three months, extend it and save labour.
Base your baseline on how the kitchen actually operates, since these factors drive deposit rates:
- Hours of operation per day, and whether one shift runs continuously
- Cooking method: frying and grilling release far more aerosolised fat than boiling or steaming
- How much the menu leans on oil, and whether the same oil is reused across services
- Filter type and condition, and whether filters are washed or replaced on schedule
- Whether the extraction fan runs at full flow during cooking, or is throttled by staff to cut noise
Name the equipment and make sure the crew can reach the surfaces
A plan that says "deep clean quarterly" fails when nobody knows what tool performs the work. State the equipment for each section. For the cooking surfaces and hood exterior, hot water and detergent with manual scrubbing is standard. For hardened grease inside the hood and on the accessible duct sections, heat does the work that scrubbing cannot. Commercial steam cleaning equipment applies high-temperature steam to soften and lift baked-on grease from hoods, filters and kitchen exhaust duct grease cleaning access points, which shortens the time a crew spends on hands and knees in a kitchen that has to reopen on schedule.
When you compare machines for this job, match four practical items to your site rather than chasing a longer specification sheet:
- Power supply. A fixed unit that runs on a normal 220 V supply suits kitchens without three-phase power at the cleaning point; check the socket rating and cable length before the crew arrives.
- Tank size and water inlet. A large tank with a tap-water inlet means fewer stops during a long session. The PowerDe HW02 fixed unit lists a 6 kW heating element, an 80 L SUS304 tank, dry and wet steam modes and a vacuum function, and it measures 1,200 × 800 × 1,200 mm including handles — check that the kitchen door and the route to the hood will take it.
- Mobility. Fixed units serve one site; hand-pushed and driving-style machines suit operators who move between kitchens.
- Safety features. Protection against leakage, short circuit, high temperature, high voltage and water shortage matters in a wet kitchen with guests nearby.
Confirm steam temperature, output pressure and duty cycle with the supplier before you write them into an operating procedure. Published figures differ between models and between the marketing text and the parameter table, and your procedure needs the number the machine actually delivers.
Assign access, downtime and a written record
Three items belong in the plan even though they are not cleaning steps:
- Access. Count the access panels on your ducts. If the duct has no panel above a fan or at an elbow, no crew can reach that section, and closing the gap is a building job that belongs in the plan with an owner and a date.
- Downtime. State which hours the kitchen closes for cleaning, and who pays for the lost service. Night and weekend work is usually the only realistic window in a busy operation.
- Records. Keep dated photos of each section before and after, the name of the crew, the equipment used and the interval set for the next clean. This is the file an inspector, an insurer or a landlord asks for.
Check the local requirements that apply to your premises before you finalise the intervals. Fire codes and lease clauses in many markets set minimum cleaning frequencies for extraction systems in commercial kitchens, and those rules override whatever your internal plan says.
Close the loop before the next clean
A cleaning plan earns its keep when it changes the next interval. After each session, ask two questions: which section came back dirtier than expected, and which section was clean enough to leave alone. Adjust the baseline, note the change, and keep the record. If your team handles several kitchens, or if the same crew also cleans factory machinery or vehicles, Shenzhen PowerDe Automation Precision Equipment manufactures steam cleaning machines in fixed, hand-pushed and driving-style configurations, and equipment can be specified for the site through the company's engineering services. Send the equipment questions and the cleaning intervals to sales@powerde.net so the specification matches the kitchen you actually operate.
