Commercial kitchen deep cleaning
The surfaces in front of you get wiped a dozen times a day. The plenum, the duct, the back of the line, the seals, the gullies and the grease trap never do - and that is where it builds.
Short answer
A daily wipe handles the surfaces in front of you. It never reaches the canopy plenum, the duct, the fan, the back of the cookline, fridge seals and condenser coils, floor gullies, grout lines, or the grease trap in the drain. These hidden stores are where build-up, odour, pests and fire risk quietly accumulate.
Every commercial kitchen has a set of places that are out of sight and out of reach by design, and a daily routine is built to skip them. They are not signs of a careless team - they are simply beyond a cloth and a busy shift. A deep clean exists to find and clear them.
The wall and floor behind ranges, fryers and grills, the equipment's own underside, legs and castors, and the gaps between units all collect heavy, carbonised grease. Reaching it means moving or stripping equipment - which is exactly why it is missed day to day.
The plenum behind the canopy filters, the ductwork and the extract fan hold the single largest store of hidden grease in most kitchens. It is also the one with a fire and insurance dimension: this is cleaned to the TR19 Grease standard, verified below 50 microns and certificated, and it is a separate scope from the kitchen deep clean even when done together.
Fridge and walk-in door seals and gaskets harbour mould and soil; condenser coils clog with dust; floor gullies and drains hold a grease layer that breeds odour and pests; grout lines and cladding seams trap residue. And there is a literal grease trap - the drainage interceptor - which needs emptying and flushing on its own schedule. Left unattended, a blocked interceptor backs up, smells, and can put your drainage out of action mid-service - a maintenance failure as much as a hygiene one. None of these survive a sniff test for long if left.
The reason this matters beyond housekeeping is that these are the very areas that quietly drag a hygiene score down, and the ones an inspector goes looking for. A kitchen can look clean surface by surface at the front and still carry all of this behind it. Clearing it is necessary - but not sufficient on its own: the deep clean removes the hidden contamination, while keeping it gone depends on your daily discipline and schedule. See also why ceilings and walls matter as much as worktops.
Questions
Usually the extraction - the plenum behind the canopy filters, the ductwork and the fan - followed by the wall and floor behind the cookline. These hold the heaviest, most carbonised build-up and the most fire risk.
The term covers two things: the hidden grease stores in extraction and around equipment, and the literal drainage grease interceptor that catches fats before they enter the sewer. The interceptor needs emptying and flushing on its own regular schedule.
They are out of sight and need equipment moved or stripped, ducts opened, or access gear - none of which fits a live service. A daily routine is designed to keep food-contact surfaces safe, not to dismantle the kitchen.
Yes. Door seals and gaskets trap moisture, mould and soil, and condenser coils clog with greasy dust that hurts performance. Both are easy to overlook daily and both are checked on a thorough hygiene inspection.
It removes the contamination and the fire load, which is necessary - but keeping it clear depends on your daily routine and schedule between deep cleans. The deep clean is the reset, not a substitute for day-to-day discipline.
Phoenix Duct Clean · by the numbers
Phoenix gets into the hidden stores - behind the line, the seals, the gullies and the extraction - and documents it. Quoted on survey, certificated on completion.