Why a central kitchen hood is a different problem from a restaurant hood
A central kitchen or commissary cooks in volume, on rotating cookware, often across shifts, and feeds many satellite outlets from one production line. Its extraction system is correspondingly larger: longer canopy runs, more filter cells per hood, higher grease loading, and a cleaning window that has to fit between production schedules rather than after closing. A supplier who recommends a machine without understanding that context will quote equipment that cleans beautifully on one restaurant hood and cannot sustain a central kitchen's canopy line. The questions below are the ones a supplier must ask before recommending equipment for range hoods in central kitchens, and each one changes the recommendation.
Question 1: How many hood metres per shift, and in what window?
- Total canopy length and filter-cell count per hood, and the number of hoods on the line.
- Whether cleaning happens between production blocks, overnight, or during a live service — a live kitchen limits how much moisture and how much standing water the job may create.
- Whether the crew has one shift to do all of it or the line can be cleaned in sections.
Throughput per shift decides whether the site needs a mains-fed machine that runs continuously or whether a self-contained unit's tank and runtime are enough. This is the first fork in the specification, not the last.
Question 2: What utilities exist along the extraction line?
- Power at the hood line, and whether the crew would otherwise be running a cable across a live production floor.
- Water supply at the point of work, and the fitting on the tap. The published machines take tap water through a 4-point internal-tooth fitting — the Fixed Steam Cleaning Machine PowerDe HW02 specifies that inlet as 1/2 inch — so a mismatch has to be solved before the first visit.
- Where the grease-laden runoff is collected and disposed of. In a central kitchen this is a drainage and waste question, and the operator must agree it in writing.
- Whether the kitchen's extraction can run during the job to carry away the steam and humidity the work generates.
If the site cannot supply water and power at the canopy, the answer moves to a self-contained unit. The hand pushed steam cleaning machine PowerDe HMW3 carries a 50 L clean-water tank with a 4.5 kW PTC heater and dry- and wet-steam modes, on a hand-push frame sized for kitchen aisles.
Question 3: What is the actual grease loading, and how often is it attacked?
Ask for photographs of a pulled filter cell and the last recorded deep-clean date. Grease loading determines the mode and the labour:
- Regular maintenance cleaning of a maintained hood: dry steam generally carries the work, delivering heat with little moisture so the kitchen stays usable.
- Encrusted cells and canopy faces: wet steam plus mechanical effort, and the time must be priced as an additional operation.
- A first attack on a hood that has not been deep cleaned: quote it as a separate restorative project from the recurring contract, because the recurring price built on that first visit will be wrong for ever.
For the recurring contract, a machine that holds its output matters more than its peak figures. The HW02 runs on 220 V with 6 kW of heating power, at about 160°C steam temperature and roughly 0.8 MPa vapor pressure, with an 80 L SUS304 tank and both dry-steam and wet-steam modes plus a vacuum function on one unit, so a crew is not swapping machines halfway along a canopy.
Question 4: Can the filters be taken off, and where are they cleaned?
- If cells come off, most of the work moves to a soak or wash area, and the machine's role narrows to the canopy and the cells' remaining surfaces — a cheaper machine may be the right answer.
- If cells are fixed, everything is cleaned in place, which drives the need for reach, mode control and runoff control at height.
- Handling: cell weight, racking, and how many people the removal needs. In central kitchens this is often the true bottleneck, not the steam.
Question 5: What are the boundaries of the contract, and what record does the client require?
- Whether ductwork, fans and the terminal are in scope or excluded — they normally are, and the exclusion should be explicit.
- Whether the client's insurer or auditor imposes an interval and a standard, and whether your method meets it.
- Whether photographic before-and-after evidence is required per hood, and who signs off the plenum interior.
- Whether hot work near a grease-laden extraction system needs the site's permit process — agree the method with the operator, do not assume it.
Once those answers are on one page, the equipment class follows from them rather than from preference. Our PowerDe cleaning equipment series lists mains-powered and battery or mobile variants together so the choice can be made against the site's utilities.
Figures not published on the product pages — runtime, hose and lance lengths, accessory sets, consumption per hour — should be confirmed with us for your actual hood count and shift window before ordering. Send us the hood layout, photographs of a pulled filter cell, and the site's power, water and drainage position, and we will tell you which machine and configuration to specify before the first visit instead of after the first failed shift.
