12/09/2026
This is inside a neglected kitchen extraction duct. The owner had been setting their own schedule for when it gets cleaned, and it hadn't been touched in years.
Cleaning frequency isn't a guess, it's dictated by how much grease/soot/debris builds up in the system. Some kitchens need it every month, some every 3, most every 6, and the lowest risk sites can stretch to a year, which is the maximum allowed.
Around a quarter of the 24,000 accidental fires in UK commercial properties every year are linked to cooking and extraction systems. But here's the bit that catches people out: if a fire is traced back to unmaintained ductwork, insurers can refuse the claim outright. Protection of the extract system is often a condition of the policy, so a neglected duct doesn't just risk a fire, it can leave you covering the damage yourself.
Yes it isn’t cheap to get it done but far less than paying the fire damage out of your own pocket.
If it's been a while since yours was checked, get it looked at before it becomes a problem.
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