Summer might be peak season for BBQs and beer gardens, but in commercial kitchens, it’s also peak season for something far less welcome: rapid grease build-up in kitchen extract systems. The combination of high temperatures, busy shifts, and longer service hours means fire risk can climb fast – and many kitchens are sliding into non-compliance before they even realise it.
Hot Weather = Faster Grease Build-up
Higher ambient temperatures mean fats and oils become more volatile. The heat softens and aerosolises grease particles more easily, which speeds up how quickly they coat your ductwork and fans. When combined with extended summer trading hours or additional seasonal menus, your system could need cleaning weeks before your next scheduled TR19 clean.
And that’s the key point: TR19 guidelines are minimum requirements. They don’t account for the added pressure of summer operations. If your system’s being worked harder, your cleaning schedule may need to change too.
Grease-Filled Ducts Are a Fire Risk – Especially Now
It’s not just about hygiene. A grease-laden extract system is a direct fire hazard. The ducting can become a hidden fuel line – out of sight, but very much in harm’s way if flames ever reach it. According to the London Fire Brigade’s own guidance, “if you don’t clean the ducting in your extraction system regularly, you’re at a greater risk of ducting fires.”
Insurance providers are paying attention too. Many policies now require documented TR19-compliant cleans. But here’s the catch: those documents need to reflect your actual risk level – not just what was scheduled months ago.
Liam Hodgson, Client Services Manager at BCS, says:
“We often find kitchens during summer are shocked at how quickly they’ve slipped out of compliance. The heat doesn’t just affect cooking, it speeds up the whole grease cycle. It’s why summer should never be treated like business as usual.”
Summer TR19: Are You Still on Schedule?
Here’s a quick look at how TR19 cleaning frequencies stack up against summer reality:
| Kitchen Usage Level | TR19 Minimum Clean Frequency | Summer Consideration |
|---|---|---|
| Heavy (12–16 hrs/day) | Every 3 months | Often every 2 months |
| Moderate (6–12 hrs/day) | Every 6 months | Often every 4 months |
| Light (2–6 hrs/day) | Every 12 months | Often unchanged unless during heatwaves |
Not sure where you stand? BCS can assess whether your cleaning regime is still fit for purpose this summer.
What We’re Seeing in Summer Extract Cleans
Summer inspections often reveal faster-than-expected build-up – especially in systems that were cleaned just a few months earlier. Grease-laden fan blades, clogged duct elbows, and fire risk ratings pushed into red.
One recent site, a medium-sized restaurant chain, had gone from green to amber in just eight weeks. The summer heat, combined with an expanded lunch service, meant their extract system became non-compliant – despite thinking they were ‘covered’ until the end of the quarter.
Mark Biffin, Director at BCS, adds:
“In the summer, grease build-up accelerates. We’ve seen systems hit non-compliant levels in under two months, even when they were fully cleaned in spring. A seasonal check isn’t just smart, it’s essential for staying safe and covered.”
Don’t Risk a Fire, Shutdown, or Insurance Issue
Now’s the time to double-check your extract cleaning schedule. If your last clean was before summer started, or if your kitchen has ramped up service hours, you could already be in the danger zone.
BCS offers nationwide kitchen extract cleaning with no additional travel charges, and every clean comes with TR19-compliant reporting and expert support. If you’re unsure whether you’re due a clean or overdue, let’s talk.
Book your summer system check today ?
