Why the extraction route must be treated as one system
A kitchen extraction system carries heat, vapour and grease-laden air away from cooking equipment. The route may include several canopies, plenums, horizontal ducts, vertical risers, access panels, a fan and an external discharge. Cleaning only the easiest section can leave deposits elsewhere, so planning begins by tracing the route as far as reasonably possible. Existing drawings and previous reports are helpful, but a site inspection may still be required where the route is concealed. Safe access to ceiling voids, roofs and plant rooms should be arranged in advance, along with any permits and isolations controlled by the building. Cooking equipment must be off and cool before work begins. Where panels are missing or badly positioned, additional access may be necessary. The contractor should explain any section excluded from the scope and should not describe a partial clean as full-system work. This system-based approach gives restaurant operators and facilities managers a more accurate understanding of what has been completed.
After cleaning: reporting and future maintenance
The post-clean information should name the system and identify the canopy, duct sections, fan and discharge areas reached. Before-and-after photographs are useful evidence inside the report, even when the public website does not display customer job photographs. Images should correspond to recognisable locations and limitations should be written plainly. The recommended review frequency depends on cooking style, production volume, operating hours, filtration and actual deposit return; it should be reconsidered if the menu or hours change. Operators should continue routine filter care between professional visits and investigate changes in noise, vibration, odour or extraction performance. If suction remains poor after cleaning, an engineer may need to assess fan condition, airflow, controls or system design. Duct Clean London can clean accessible extraction components and report observations, but cleaning is not a substitute for mechanical repair. To discuss your kitchen, provide the full postcode, photographs, operating schedule, fan location, access information and the most recent report if one is available.