Ductwork Cleaning (Grease & Vent)

Our services

What is ductwork cleaning?

Poorly maintained ductwork can quickly become a hidden fire and hygiene risk. In commercial kitchens, grease build-up within extract systems creates a serious combustion hazard that can cause fire to spread rapidly. Regular ductwork cleaning isn’t just good practice, it’s a legal and insurance requirement designed to keep people and property safe.

At Complii, we help clients meet every aspect of their regulatory obligations under the Regulatory Reform (Fire Safety) Order (RRFSO) and BESA TR19® Grease guidance, ensuring extract systems remain safe, compliant, and fully verified.

Why choose Complii?

How we can help.

Protect your people, property, and business. Here’s why we’re the right choice for ductwork cleaning.

Expert risk assessment

Our accredited engineers carry out detailed inspections and grease-thickness testing in line with BESA TR19® Grease standards. We assess every section of your system to identify fire risks and establish safe cleaning frequencies tailored to your site’s usage and insurance requirements.

Fully compliant cleaning

We deliver deep cleans using best-practice methods for all types of duct systems, canopies, and plenums. Every clean is carried out in line with the latest industry guidance, ensuring surface grease levels remain below the 200-micron threshold required to minimise fire risk.

Evidence-based verification

Following each service, we provide comprehensive post-clean reports with before-and-after photographs, system schematics, and grease-thickness data. All reports are registered under the BESCA VHE scheme (or equivalent), giving you full traceability and peace of mind that your system is compliant.

Tailored cleaning schedules

We know every kitchen operates differently. Using historic data and predictive accumulation assessments, we help you determine optimal cleaning frequencies to stay within safe limits — preventing hotspots and maintaining insurance compliance.

Ongoing monitoring and support

Fire safety and hygiene are continuous responsibilities. Our team works with your management and facilities teams to review performance, adjust schedules, and ensure fire safety arrangements are always up to date.

Reduced risk and downtime

With Complii, you can focus on your core operations knowing your extract systems are safe, compliant, and performing efficiently. We work discreetly and efficiently, minimising disruption while keeping your kitchen running smoothly.

Your questions answered.

Most kitchen extract systems require a full clean at least once a year. However, frequency depends on usage levels and grease build-up rates. We determine the correct schedule based on your system’s actual conditions and risk profile.
Neglecting ductwork cleaning can invalidate your insurance, increase fire risk, and lead to regulatory action. In the event of a fire, insurers may refuse a claim if records of cleaning and certification are missing.
Under the RRFSO and other fire safety regulations, the duty holder or responsible person is legally accountable for maintaining fire safety, including the condition of extract systems.
After every service, you’ll receive a full post-clean verification report and certification through BESCA VHE, confirming compliance with TR19® Grease standards.
Yes. We provide ongoing monitoring, maintenance planning, and regular reviews to ensure your systems remain compliant, safe, and aligned with your insurance obligations.

Ductwork cleaning (grease & vent).

What is ductwork cleaning?

How we can help.

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