Exhaust Hood Cleaning for Commercial Kitchens

Exhaust hood cleaning removes grease and residue from the hood canopy, filters, grease trays and surrounding stainless steel, along with any accessible grease build-up around the cooking line. The deeper parts of the system, mainly the ductwork and exhaust fans, usually fall to a specialist exhaust cleaning contractor rather than routine kitchen cleaning, since they are harder to reach and often tied to fire-safety and inspection requirements.

Grease accumulates fast in a busy commercial kitchen, and it does not stay on the surface. Keeping the visible parts of the hood clean is day-to-day maintenance, while the concealed parts of the exhaust system need a different level of service. Understanding which is which keeps the kitchen cleaner and helps you plan the right work at the right time.

What Exhaust Hood Cleaning Usually Covers

Routine exhaust hood cleaning focuses on the accessible parts of the system that collect grease during service. These are the areas a kitchen team or general commercial cleaner may help maintain, depending on scope, products and site requirements.

• Hood canopy: the visible surfaces inside and outside the hood
• Filters: baffle or mesh filters that trap grease from the air
• Grease trays and cups: the collection points that catch dripping grease
• Surrounding stainless steel: splashbacks and panels around the cooking line
• Accessible grease build-up: reachable ledges, edges and seams near the hood

The parts that routine cleaning does not cover are the ductwork running from the hood and the exhaust fan system. Grease travels into these concealed sections and builds up over time, which is why they generally need a specialist exhaust cleaning contractor with the right access equipment. General commercial cleaning can keep the kitchen and accessible hood surfaces maintained, but concealed duct and fan cleaning is a separate, specialist task.

How often should exhaust hoods be cleaned?

Frequency depends heavily on how much greasy cooking the kitchen does. As a general planning guide, kitchens with heavy frying, grilling or high-volume greasy cooking usually need much more frequent attention than kitchens with lighter use. The figures below are cautious ranges, not fixed rules, and your actual requirements may differ.

• Filters: often cleaned daily to weekly in busy kitchens, less often in lighter-use kitchens
• Hood surfaces and grease trays: often wiped down daily, with a deeper clean scheduled regularly
• Ductwork and fan systems: usually cleaned by a specialist on a periodic schedule based on grease load and applicable requirements

Because the right frequency varies so much, it is best to check what applies to your specific kitchen rather than relying on a single number.

Safety, Compliance and What This Guide Does Not Cover

Exhaust system grease is a recognised fire risk in commercial kitchens, which is why concealed duct and fan cleaning is often regulated and inspected. This guide covers practical maintenance of accessible hood surfaces only. It does not certify fire safety, confirm compliance, or replace specialist advice.



For anything relating to fire safety, duct and fan cleaning intervals, record keeping or certification, check your local requirements, your insurer's requirements, and the advice of a qualified specialist exhaust cleaning contractor. Requirements can vary by location, kitchen type and insurer, so confirm what applies to your premises rather than assuming a general rule covers you.

DIY Surface Maintenance vs Specialist Exhaust Cleaning

There is a clear line between what a kitchen team can maintain and what needs a specialist. Routine surface maintenance keeps the accessible parts clean between professional visits.

Day-to-day maintenance a kitchen team can usually handle:

• Remove and clean or soak filters according to the manufacturer's guidance
• Wipe down hood surfaces and stainless steel after greasy service
• Empty and clean grease trays and cups regularly
• Clear reachable grease build-up before it hardens

Work that usually needs a specialist:

• Cleaning inside the ductwork and exhaust fan system
• Removing heavy or hardened grease from concealed sections
• Any cleaning tied to fire-safety inspection or certification requirements
• Access to parts of the system that require dismantling or specialist equipment

Using the right degreasers and following safe methods matters here. A broader overview of kitchen hygiene and safe cleaning practices sits alongside this in a wider commercial kitchen health and safety guide.

When to Bring In a Specialist

Call a professional or specialist exhaust cleaning contractor when grease build-up is heavy, when the ductwork or fan system needs cleaning, when there are fire-risk concerns, or when an inspection or certification requirement applies. These situations go beyond surface maintenance and need the right access equipment, methods and, in many cases, documentation.



Attempting deep exhaust system cleaning without the right equipment may miss concealed grease or fail to meet documentation requirements, so it is safer to have the system assessed by a qualified contractor when any of these apply.

Frequently Asked Questions

What is included in commercial exhaust hood cleaning?

Routine exhaust hood cleaning usually includes the hood canopy, filters, grease trays and surrounding stainless steel, plus accessible grease build-up around the cooking line. Cleaning the concealed ductwork and exhaust fans is a separate specialist task, often tied to fire-safety and inspection requirements, rather than part of routine hood maintenance.

How often does a commercial exhaust hood need cleaning?

It depends on how much greasy cooking the kitchen does. Filters and hood surfaces in busy kitchens are often cleaned daily to weekly, while ductwork and fan systems are cleaned periodically by a specialist based on grease load and applicable requirements. Lighter-use kitchens usually need less frequent attention, so check what applies to your kitchen.

Can kitchen staff clean the exhaust hood themselves?

Staff can usually maintain the accessible parts, including filters, hood surfaces, grease trays and reachable build-up, following the manufacturer's guidance. Cleaning inside the ductwork and fan system, or anything tied to fire-safety inspection, generally needs a specialist contractor with the right access equipment, so day-to-day maintenance and deep system cleaning are best treated separately.

Does exhaust hood cleaning meet fire-safety requirements?

Surface hood cleaning is maintenance, not certification. Fire-safety and duct-cleaning requirements vary by location, kitchen type and insurer, and often involve concealed ductwork and fans that a specialist must clean and document. Check your local requirements, your insurer's requirements and a qualified contractor's advice to confirm what applies to your premises.

Keeping the Exhaust System Under Control



Exhaust hood cleaning is best handled in two parts: regular maintenance of the accessible hood, filters, trays and stainless steel by the kitchen team, and periodic specialist cleaning of the concealed ductwork and fan system where required. Matching the frequency to how much greasy cooking the kitchen does, and confirming fire-safety and inspection requirements with your local authority, insurer and a qualified contractor, is what keeps both the kitchen and the wider exhaust system under control.