What parts of your system are you responsible for?
All relevant parties such as tenants, facilities managers and building owners must be aware of their obligations to kitchen exhaust cleaning and how they may differ in different circumstances.
Common kitchen exhaust systems are generally maintained by the building owner and coordinated by facilities management. This will generally include all horizontal main ductwork in common areas, risers, fans and any associated rooftop ductwork. This may differ depending on the terms agreed upon in your lease. The tenancy component is usually the responsibility of the tenant which includes primary honeycomb or baffle filters, canopies/hoods, connecting ductwork and any inline components such as booster fans and electrostatic filtration units/spark arrestors.
Stand-alone kitchen exhaust systems are generally the responsibility of the tenant, depending on the conditions agreed upon in your lease. This will generally include all components of the system from top to bottom. AS1851-2012 makes no allowance for some components being cleaned and not others.
Cleaning of all components should be documented with before and after photos and accompanied with certification and a detailed report. If your current contractor is not providing this evidence, from experience, there is a high likelihood that the work hasn’t been done or has only partially been done.