A regional town centre with a scheduled six-monthly exhaust clean in January and July might appear to be in the clear on paper. But put that same pub through a three-week-long agricultural show season in April and May, and you add in a full fryer line and extended trading hours, and before long that system can be nearing dangerous levels of grease accumulation even before a July service is even booked in. The certificate says all looks good with the kitchen schedule, but the duct would say otherwise. The issue is between the static cleaning calendar and a genuine compliance strategy and, for Glenn Innes venues with real seasonal variation, that gap is a pretty big one.
How AS 1851 Determines Frequency by Cooking Load?
When it comes to Australian Standard AS 1851-2012, there is no one-size-fits-all cleaning interval that applies to every single commercial kitchen. In fact, frequency is all about looking at the cooking volume and the type of kitchen you’ve got. High volume operations that are pumping out a ton of grease vapour might need a service every month. Kitchens that run a shorter schedule with fewer hours might be able to get by on a six to twelve month clean cycle. That’s why kitchen exhaust cleaning Glenn Innes operators must base their schedule on actual cooking load, not just calendar dates.
The AIRAH Best Practice Guideline on Commercial Kitchen Exhaust Management advises that people record their appliance schedule, cooking processes and operating hours so that a qualified contractor can work out the best interval for the job using documented evidence. Without that information, any interval you set is just a rough guess, not a proper, measured assessment.
The Seasonal Trading Gap
A venue that gets its cleaning schedule right based on average trading volume can then simply drift into a high-volume period without ever checking the interval again. But that’s the problem. During harvest seasons, community events or holiday trading, a kitchen that’s running extra hours, more fryers or a higher volume menu will be pushing its actual grease accumulation rate way above the rate that the schedule was based on.
A six-monthly clean schedule can reach critical levels in just three months during a sustained peak. The compliance certificate is still all current on paper, but the real condition of the duct has already gone past the threshold the schedule was trying to prevent.
The 2024 Ventilation Standard and Its Impact on Regional Kitchens
The 2024 update to Australian Standard AS 1668.2 has changed how we classify cooking equipment and how exhaust rates are worked out for commercial kitchens. It also means equipment that used to be classified as lower category is now being moved into a higher one. And what does that do? It affects whether the current exhaust system is actually going to be big enough to cope with the cooking load it’s being asked to handle.
When we get an undersized ventilation rate, it compounds the problem. If the exhaust rate isn’t enough to keep up with the cooking load, more grease-laden fumes are escaping the canopy and piling into the duct at a rate way faster than the cleaning schedule would ever assume. So, for operators who have changed equipment or added to their menus since the system was last looked at, it’s time to get the ventilation looked at again against the 2024 requirements before you just assume the current schedule is still going to be good enough.
Changes Introduced by the February 2025 NSW Reforms
From February 2025 onwards, there was an even stronger focus on the necessity to comply with AS 1851, meaning that there should be no deficiencies found after a fire safety order, and the building operators need to show that the proactive and properly documented maintenance was performed. Therefore, venues which had been relying on unprofessional and informal cleaning will now function under conditions of having the bigger risk of legal and insurance consequences for the lack of specific and relevant documentation.
How to Create a Schedule That Will Depend on the Way the Kitchen Operates?
In order to create a proper maintenance schedule for a regional venue with changing traffic patterns, the following actions should be performed:
- Set the initial interval with the help of a professional contractor during the beginning of the year based on expected load.
- Identify the times of the year or events when the amount of cooking will increase, and add one extra service or inspection.
- After each service, check the pre-clean grease measurement; if there has been more grease accumulated than before, reduce the interval.
- Keep the digital record of all services available to the building owner, insurer, and fire authority.
The schedule that has been fixed forever without changes does not depend on the way the kitchen works. The duct does not care what the certificate says.
