Start With the Capture Point, Not the Duct
The filter and grease-collection baffles at the hood face are the first surfaces to load up, and they set how much grease reaches everything behind them. Work both sides. The kitchen side collects the fresh, sticky film, while the duct side carries the older layer that has been heating and cooling for months. A plan that only addresses the visible interior of the hood leaves that downstream side to thicken unnoticed.
Also map the filter frame, the seam where it sits, and the lip behind it. Grease settles in the joints and corners around a filter rather than on the open mesh, which is why a filter can look acceptable while the housing around it is heavily coated. Photograph those edges at each inspection so you are comparing like with like over time.
Then the Surfaces Above and Behind the Line
Move up to the plenum, the box inside the hood above the filters. It is usually out of sight once the hood is installed, so it is left out of daily and weekly tasks even though vapour condenses on its inner walls. Include it in your periodic cleaning scope and note access points in the plan, because a surface you cannot reach has to be addressed when the hood is opened, not squeezed into a nightly routine.
Behind the hood, the riser and the horizontal duct run are a separate cleaning task that needs its own schedule and its own records. Access hatches, the low points of the run, and the first bend after the hood collect more than straight sections do. Cleaning frequency along the duct should follow how heavily the line runs and how much of the load the filters are catching.
Above the fan, the fan housing interior and the discharge outlet are the last surfaces in the airflow and frequently the most neglected. Blade surfaces and the housing walls carry a different residue than the duct, and the outlet accumulates what the fan throws out. Include both in the plan even when the fan sits on the roof and nobody walks past it.
Don't Forget the Kitchen-Side Surfaces Around the Hood
The outside of the hood shell, the panels beside it, and the ceiling around the capture area all collect drifting grease and dust. Because they are visible, they get wiped more often than the interior does, but a quick wipe with a general-purpose cloth only moves the film around. Include them as surfaces requiring a degreasing step rather than a polish.
The appliances directly below are a separate line in the plan: grill, fryer, griddle, and the backsplash and side panels next to them, plus the surrounding floor. These are the surfaces with the highest load in the room. A structured range hood steam cleaning routine for the hood, filters and surrounding panels is what carries restaurant kitchen grease cleaning onto a fixed schedule instead of leaving it to whatever has time at closing.
A Simple Way to Check Whether the Plan Has Gaps
Take the airflow path from the pan to the roof and trace it on a drawing of your kitchen. Mark every surface the vapour touches, then mark which of those appear in a written task with a named frequency and a named owner. Surfaces that appear in the drawing but not in the task list are your gaps. In most kitchens that is the plenum interior, the filter frame, the fan housing, and the discharge outlet.
Record what you find at each inspection rather than relying on memory. A short note against each surface, plus a photograph, lets you see whether a frequency is working or whether a surface is loading faster than the schedule assumes. When a surface consistently needs a shorter interval, split it into its own task instead of shortening the interval for the whole system.
For the recurring degreasing step on hoods, filters and the equipment below them, the Fixed Steam Cleaning Machine PowerDe HW02 is a stationary unit built for high-temperature, high-pressure work with a switchable dry and wet steam mode; the listing on our site covers its vehicle, interior and engine-compartment applications. If your line needs the same high-temperature approach on kitchen surfaces, tell us the surfaces and the frequency, and we will confirm which configuration fits.
Before You Finalise the Schedule
Write the plan as three layers. Nightly tasks stay at the appliances and the hood face. Weekly tasks cover the filters, the filter frames and the exterior panels. Periodic tasks cover the plenum, the duct run, the fan and the outlet. A plan with those three layers, each with a frequency you can defend from your own inspection notes, covers the surfaces around the extraction system that an inspection will ask about, and it stops the cleaning budget from going into surfaces that were never the problem.
If you want a second set of eyes on your scope, PowerDe cleaning equipment is our commercial cleaning range, and our engineering team can review a surface list against the equipment and intervals you are working to.
