Here is a scenario worth taking a moment to think about. A commercial kitchen in Glenn Innes does a Friday night service, gives the visible surfaces a good wipe down afterwards, and files its next Annual Fire Safety Statement along with a cleaning certificate that’s eight months out of date. It’s not like anyone spots the dodgy paperwork right off the bat. Nope, nobody thinks twice about it until that insurance renewal shows up in the mail or a fire authority inspector comes knocking, or, worst-case scenario, something actually breaks out inside the duct. At this point it’s not just a matter of whether the system was up to code; it’s about whether the owner has got an aching sense of responsibility, a nagging fear of the law and potential catastrophe all waiting to tip over into nightmare.
How Grease Builds Up Over Time?
Every time you fire up the kitchen, a thin layer of condensate forms on every internal surface inside the duct that the exhaust vapour comes into contact with. To start with, that layer is lovely and thin. But in a kitchen that’s running deep fryers 24/7 or has people grilling away all day, that film keeps building up with each successive service, turning into a dense, polymerised goop. Now polymerised grease is a whole different story; it’s a lot harder to get rid of than the initial build-up and it’s also a lot more flammable. Professional grease cleaning Glenn Innes services use industrial alkaline degreasers specifically formulated to break down this kind of polymerised residue.
Fire and Rescue NSW have put together some pretty stark data on how fast grease fires can spread from ducts through radiant heat. And in kitchens that are running deep fryers, the grease vapour is a lot more intense and builds up fast. And don’t even get me started on the potential damage.
The Compliance Framework That Should Be In Place in Glenn Innes
Now when we talk about kitchen exhaust systems, the standard to follow here is Australian Standard AS 1851-2012. And the rules say that you’ve got to be checking your kitchen exhaust fans, hoods, filters, and grease gutters every month to see if there’s an excessive build-up of grease; regular cleaning schedules depend entirely on how much you cook and the scale of your operation.
High volume places like restaurants and cafes need to have the systems cleaned as often as every month, whereas lower volume kitchens running shorter hours might be able to get away with cleaning on a six to twelve month cycle. The problem is, though, just tidying up the kitchen every year without actually thinking about how much you’ve been cooking won’t cut it. That’s not compliance, that’s just routine.
What Should Be On the Certificate?
Now when it comes to compliance certificates, a generic “system cleaned on [date]” is not going to cut it. Under AS 1851, a proper certificate needs to include all these things:
- The exact date the work was done and who did it.
- Before and after measurements of the grease thickness to show that the system is safe to operate.
- Some photographic evidence of what the system looked like before and after the clean.
- The recommended next service date based on the size of your operation.
If the only thing on the certificate is just the word “system cleaned on [date]” then you can bet your house it won’t stand up to any kind of scrutiny from a fire authority or insurance company after a fire.
Why Are Both the Insurance and Council Documentation at Risk?
The vast majority of insurance policies for commercial premises in NSW have conditions attached that include a need for a current certificate of cleaning as part of their fire cover policy. A fire that breaks out in a venue that does not have the required documents is likely to see its claim denied. NSW commercial buildings should also provide an Annual Fire Safety Statement to their local council stating that fire protection systems meet the Australian Standard requirements, and it includes kitchen exhaust systems.
From February 2025, NSW shifted the responsibilities of maintaining complete and up-to-date compliance documentation onto the operators and building owners, and not to address compliance problems only after a fire safety order is issued.
The Section That No One Cleans
Operators with easily accessible filters and a clean canopy exterior can still be operating a non-compliant system. The section from the canopy through the ductwork to the exhaust fan on the roof, including all turns, horizontal sections, and the fan housing, are where the greatest build-up happens and where cleaning systems that focus solely on filter cleaning do not go.
In the case of Glenn Innes operators having limited access to specialist contractors near the facility, the solution is to organise professional cleaning services of the full system in advance, keep records available online to both the building owner and insurance and fire authorities, and adjust the frequency of cleaning following any changes in menu, equipment, or trading hours.
