CLEANING YOUR KITCHEN EXTRACT SYSTEM FOR SAFETY COMPLIANCE

February 24, 2026

Kitchen Extract Cleaning to TR19® Hygiene Standards


Kitchen extract systems can be the most at risk parts of a buildings full ventilation system. These ducts are active in harmful or hazardous environments where grease or bacteria are generated by cooking. The system draws from the kitchen below, that means grease, oil and other particles are drawn up into the ductwork.


General exposure to cooking throughout the day and in the evening causes grease to stick to the metal surface of the ductwork. These accumulations are difficult to remove and can be extremely stubborn - they cannot be removed except by specialist cleaning chemicals and methods. If grease is left unattended then it can cause a fire to spread quickly through a system and cause severe damage and danger to life.


Some kitchens also work through the night, especially 24/7 restaurants such as McDonald's so it's especially important to keep these systems clean because of the volume of grease moving upwards into the system. When a system isn't look at or cleaned regularly then grease can build up fast. Since ductwork is a confined space and is often cut off from view it can be challenging to keep track of without a professional plan.


One of the number one causes of fires as specified by insurance companies and fire safety is via ductwork in commercial kitchen environments. These fires can lead to legal and reputational damage when there is no record of continued maintenance of the system and keeping it clean.


These systems are a really big risk. This is why frequent inspections and cleaning must be carried out, along with inspections following a clean to ensure it is safe. TR19® gives the basic framework of how a system must be maintained and protecting lives, buildings and businesses.


Your Legal Obligations


People that own restaurants and commercial kitchens have a legal obligation to keep their kitchen extract systems safe and compliant. There are regulatory requirements and expectations that are covered in fire safety regulations, workplace safety and keeping your environment hygienic.


The Fire Safety Order requires the people responsible to reduce fire risks in non-domestic environments. This essentially means identifying issues/grease within kitchen extract systems, followed by scheduling cleaning and proper system maintenance to ensure fire risk remains low.


If these requirements are not adhered to it can result in legal action being taken against you, therefore it is imperative you keep systems checked regularly and cleaned as often as is required to keep the system in a safe condition as specified in the TR19® guidelines.


Insurance providers now require regular documented proof of clean systems including micron levels to ensure a system is kept as clean as it possibly can be. If a system isn't cleaned regularly it can lead to insurers not covering you as proof of regular cleaning and maintenance is required.


It is in the best interests of any restaurant or commercial kitchen to keep regular documented proof of any cleaning to ensure you are protected in terms of both safety and legality.


TR19® - How Frequently Should Cleans Be Carried Out?


The guidance in TR19® is very clear. A kitchen extract system must be protected by regular cleaning depending on the amount of use a system has within a restaurant.


Heavy System Use: Specifically 12 to 16 hours use per day - cleaned every 3 months

Medium System Use: Specifically 6 to 12 hours use per day - cleaned every 6 months

Light System Use: Specifically 2 to 6 hours use per day - cleaned every 12 months


These are the bare minimum amount of cleans required sometimes it is necessary to go above these levels of cleaning in order to ensure maximum safety.


The methods used to clean a system are also laid out in TR19®. The full process includes the kitchen extract ductwork, the extraction fan, the kitchen canopy, and all reachable areas. Any inaccessible areas must be reached with new access panels.


To properly clean a system it is recommended that specialist chemical is used to first loosen the deposits on the surface before scraping and wiping away. Leaving the surface spotless, this not only boosts safety but stops the kitchen from emanating bad odours into the actual restaurant dining area - it can lead to bad reviews from customers if the smell is caused by bacteria on the grease.


Teams on-site must take well lit photos - before and after areas that have been cleaned to show clearly that grease/carbon has been removed and the systems safety has improved. Micron readings must also be taken.


By following these methods and timelines your system will be compliant with safety standards.


How To Structure Your Contract


It is essential to ensure your contract covers everything you need, ensuring your sites remain compliant with TR19® standards and openness with your chosen contractor.


The Contract should specify the following in detail:


Required work scope: Detail how much cleaning is required. It should specify filters, canopies, ductwork, risers, fans and discharge areas.

Frequency of Cleans: Specify the amount of cleans your require whether it's every 3, 6 or 12 months or even more frequently if necessary to ensure your site is safe. This should be clearly stated.

Accessibility: Ensure any inaccessible areas are dealt with - your contractor should specify which areas need attention

Verification of work completed: You must state clearly that photographs must be clear and taken from exactly the same point to ensure any grease removal/cleaning is visible and consistent. Extra photos can also be taken to ensure a thorough clean.

Report on work completed: Ensure a comprehensive report is completed for every clean of the system. This guarantees that you will be protected in the future if anything goes wrong. The requirements of what should be featured in a report are within TR19® guidelines.

Emergency work: If an urgent issue arises directly linked to the work carried out with the ductwork then it should be specified that the contractor returns to site in order to fix the issue as quickly as possible (only if related to the work carried out) - electrical faults or anything of that nature unrelated to cleaning should be carried out by maintenance or an electrician.

Whose responsible: It must be made clear who the responsible party is for isolating, ensuring full system access and restarting services following cleaning.


Certification And Ongoing Safety


Ensuring a system is clean and safe is not just a one-off job. It is essential for ongoing compliance with legal requirements. Ensure reports are regularly submitted following all cleans carried out on-site. This protected both yourself and the contractor making sure you are both adhering to what is legally required.


Contractors have to provide a comprehensive report of the work carried out including:


Before and After Pictures

Results of Micron Readings

A Summary of the work completed

Any access issues encountered and what is required

A report on overall hygiene levels and safety


These reports ensure a full guarantee of evidence. The evidence can be used for insurance and legal requirements and ensuring that you full within the law. They are your protection from legal difficulty and insurance liability.


The documented reports should be stored safely somewhere in dated folders - they should be checked after every job to ensure they fall within the specified remits of what has been laid out in the agreement between the contractor and restaurant/chain.


Peace of mind is always worth what these reports provide for legal and insurance purposes.

  • Why is grease in kitchen extract systems a fire hazard?

    Deposits can set alight if a fire spreads upwards during cooking. The fires can come from fryers, open flame cooking and radiant heat. If a flame hits grease it can be really dangerous as it is extremely flammable. The fire brigade specifically mentions kitchen extract fires as one of the main callouts they recieve. An fire spreads through ductwork every 9 days on average.

  • What is the threshold for Micron readings?

    TR19 makes clear that grease levels should be controlled effectively to ensure they do not exceed 200 microns. 200 microns is essentially the thickness of a credit card. If any level reading is above this then immediate attention is required to protect site safety.

  • How often should systems be cleaned?

    Depending on system usage, a clean should be carried out at certain regular intervals. The recommended amount is every 3 months, 6 months or 12 months depending on how many hours the restaurant is open and how often cooking takes place. If a system is left standing then it accumulates high levels of grease which can be extremely dangerous.

  • What obligations are you required to follow?

    The Regulatory Reform Order applies to all ductwork used by commercial kitchens and requires the people responsible to keep assessing the state of their kitchen extract and keeping the risk low with regular system cleaning. Greasy systems can be extremely hazardous and lead to fires spreading rapidly.

  • What do you need for insurance purposes?

    Many insurance companies will check how often your kitchen extract is cleaned and will ask for reports to be provided so they have clear evidence that you are keeping your restaurant safe. Failure to keep a system fully safe could result in insurance policies being invalidated. You must ensure cleans are regularly completed and the reports provided are comprehensive and accurate.

Latest News

PROUD TO BE A WAKEFIELD BUSINESS

April 20, 2026
We are committed to supporting our local community across West Yorkshire. From donating new rugby kits to schools to collaborating with Wakefield College on live student projects, community engagement is a core part of what we do. Giving back is central to our business ethos. We believe in investing in the next generation by supporting education, providing opportunities, and helping young people develop real-world skills. As a responsible business, we prioritise ethical standards and best practices in everything we do. Our community initiatives reflect this commitment. We have also made a contribution to Wakefield College, funding departmental upgrades, new equipment, and the development of modern learning spaces. By working closely with local organisations and educational institutions, we aim to create lasting, positive impact where it matters most. As we move forward we intend to take part in more community projects and invest back into Wakefield's future. We will be bringing more updates soon.

OUR CHRISTMAS 2025 MEETING

April 15, 2026
What are the benefits of a yearly summary meeting? Each year, just before the Christmas period, we hold a “Year in Review” meeting to reflect on our annual performance and assess the progress we’ve made as a team. This end-of-year review provides a structured opportunity to evaluate our achievements, measure business impact, and align on priorities for the year ahead. The session covers a full overview of the past twelve months, including new client contracts, key project milestones, and notable successes across the business. We highlight work we are particularly proud of, recognising both individual and team contributions that have helped drive results. In addition to celebrating achievements, we review important business data and financial performance. This allows us to assess growth, track progress against objectives, and gain clear insight into how our work has contributed to overall company success. We also reflect on challenges faced throughout the year and the lessons learned, ensuring continuous improvement going forward. Overall, the Year in Review meeting plays a vital role in strengthening team alignment, recognising success, and setting a clear strategic direction for the future. Brent provides key operational updates, focusing on how we’ve improved the efficiency and delivery of work on the ground. Geoff then shares a broader business update, including performance insights and new ideas and opportunities for the year ahead. The rest of the team also contribute by sharing their individual updates, along with plans and suggestions for how we can continue to improve and develop moving forward.

TOP TEN MISTAKES WHEN IT COMES TO HVAC AND DUCTWORK HYGIENE

April 2, 2026
1. Skipping Regular Cleaning Failing to schedule routine cleaning allows dust, debris, and microbial build-up to accumulate. Consequences include: Reduced airflow and energy efficiency Poor indoor air quality Increased risk of system damage Tip: Establish a regular cleaning schedule based on system usage and manufacturer guidance. 2. Ignoring Inspection of Ductwork Ducts often conceal dirt, grease, and contaminants. Skipping inspections can result in: Hidden microbial growth Odours circulating throughout the building Reduced HVAC efficiency Tip: Include full duct inspections as part of every maintenance cycle. 3. Using Unqualified Contractors Hiring non-accredited or inexperienced technicians increases the risk of incomplete cleaning or non-compliance. Tip: Always use accredited professionals (VHR, BESA, SafeContractor, EVHA) for duct and HVAC cleaning. 4. Neglecting Documentation Proper records of cleaning and maintenance are crucial for: Regulatory compliance (TR19® and health & safety) Insurance claims Audits and inspections Tip: Request detailed reports with before-and-after photos and certificates from your contractor. 5. Overlooking Filter Maintenance Dirty or improperly maintained filters can: Circulate dust and allergens Reduce system efficiency Increase energy costs Tip: Replace or clean filters according to manufacturer and TR19® recommendations. 6. Waiting for Problems to Occur Reactive maintenance is risky and costly. Systems left until failure can cause: Unexpected downtime Expensive emergency repairs Compromised air quality Tip: Implement preventive maintenance plans to reduce risk and costs. 7. Ignoring Seasonal Challenges Changes in temperature and humidity can accelerate microbial growth and dust accumulation. Not adapting maintenance accordingly may lead to: Odours and poor air quality Reduced HVAC performance Staff and visitor discomfort Tip: Schedule seasonal inspections to mitigate environmental impacts. 8. DIY Cleaning Attempts Attempting to clean ductwork yourself is often ineffective and dangerous: Risk of injury Incomplete cleaning May void compliance and insurance coverage Tip: Always rely on certified specialists for safe, effective cleaning. 9. Failing to Address Moisture and Condensation Moisture in ducts promotes mould and bacterial growth. Ignoring this can lead to: Health risks for occupants Unpleasant odours System degradation Tip: Inspect for leaks and condensation regularly and address issues immediately. 10. Underestimating the Impact on Health and Comfort Poor duct and HVAC hygiene affects everyone who enters your building: Staff may experience respiratory issues or fatigue Customers and visitors notice poor air quality Reputation and trust can suffer Tip: Maintain clean systems to ensure a safe, comfortable, and healthy environment.

HOW OFTEN SHOULD SYSTEMS BE CLEANED?

April 2, 2026
Kitchen Extract Cleaning Frequency Regular cleaning of kitchen extract and HVAC (heating, ventilation, and air conditioning) systems is essential for fire safety, compliance, air quality, and system efficiency. The frequency of cleaning depends on usage, environment, and industry standards such as TR19®. Kitchen extract systems accumulate grease quickly, making them one of the highest-risk areas for fire. According to TR19® guidelines, cleaning frequency should be based on usage levels: Heavy Use (12–16 hours per day): Every 3 months Moderate Use (6–12 hours per day): Every 6 months Light Use (2–6 hours per day): Every 12 months Low Use (less than 2 hours per day): Every 12–24 months Regular cleaning removes grease build-up and reduces the risk of fire, ensuring compliance with fire safety and insurance requirements. HVAC System Cleaning Frequency HVAC systems do not accumulate grease like kitchen extracts, but they still collect dust, debris, and contaminants that affect performance and air quality. Typical cleaning and maintenance schedules include: Air filters: Every 1–3 months Kitchen Extract Ductwork cleaning: 3, 6 or 12 months depending on usage Full system inspection: Annually Businesses with high occupancy, dust levels, or sensitive environments (such as healthcare or food production) may require more frequent cleaning. Factors That Affect Cleaning Frequency Several factors determine how often systems should be cleaned: Type of business: Restaurants require more frequent cleaning than offices Usage levels: Higher usage leads to faster build-up Environment: Dust, grease, and humidity increase contamination Regulatory requirements: Compliance with TR19® and health and safety laws System performance: Reduced airflow or efficiency may indicate cleaning is needed Why Regular Cleaning Matters Failing to clean ventilation systems at the correct intervals can lead to: Increased fire risk from grease accumulation Poor indoor air quality affecting staff and customers Reduced system efficiency and higher energy costs Regulatory non-compliance and potential fines Insurance issues due to lack of maintenance records Routine cleaning helps maintain safe, efficient, and compliant systems. The Importance of Professional, Documented Cleaning Working with accredited contractors ensures that cleaning is carried out to recognised standards and properly documented. This provides: Evidence for compliance and inspections Support for insurance claims A clear audit trail of maintenance Professional services ensure systems are cleaned safely, thoroughly, and in line with industry best practices.

WHY DOCUMENTED EVIDENCE IS ESSENTIAL FOR COMPLIANCE AND INSURANCE PURPOSES

April 2, 2026
Ensures Regulatory Compliance In the UK, businesses must comply with TR19® ventilation standards, fire safety regulations, and health and safety laws. Documented evidence demonstrates that: Ventilation systems have been regularly cleaned and maintained Work is performed by qualified, accredited contractors Compliance can be verified during inspections or audits Without proper records, businesses may fail inspections or be penalised for non-compliance. Protects Against Insurance Claims Most insurers require proof of regular maintenance for commercial ventilation systems. Documented cleaning: Supports insurance claims in the event of fire, property damage, or health incidents Prevents claims from being denied due to “lack of maintenance” Reduces potential financial exposure for the business Proper records provide peace of mind and demonstrate proactive risk management. Provides Accountability and Traceability Documented reports include: Details of cleaning methods and processes Before-and-after photos of ductwork or extract systems Inspection results and any corrective actions taken These reports create a clear audit trail, showing that the business took all necessary steps to maintain safety and hygiene. Highlights the Value of Accredited Contractors Using accredited contractors like VHR, BESA, or SafeContractor-certified providers ensures that documentation: Meets industry and regulatory standards Is detailed, reliable, and auditable Includes certificates or accreditation confirmation for compliance records Professional documentation reinforces credibility with inspectors, insurers, and stakeholders. Supports Staff, Customer, and Visitor Safety Documented evidence isn’t just about compliance—it also protects the people who occupy your building. Records show that ventilation hygiene is: Regularly monitored and maintained Conducted according to industry best practices Effective at reducing risks of poor air quality, fire, or microbial growth This gives employees, customers, and visitors confidence in the safety of your premises.

KEEPING YOUR VENTILATION AND INDOOR AREAS CLEAN IN SUMMER

April 2, 2026
Why Summer Ventilation Maintenance Matters Increased Dust and Pollen: Open windows and higher air movement can introduce dust and pollen, affecting indoor air quality. Humidity and Microbial Growth: Warm, humid conditions encourage bacteria, mold, and fungal growth in ventilation ducts and indoor surfaces. Higher System Usage: Cooling systems and fans run more frequently, accumulating dust, grease, and debris faster. Regular cleaning prevents these issues and ensures your systems operate efficiently throughout the season. Protect Staff and Visitors Summer heat combined with poor air circulation can: Trigger allergies, respiratory issues, and headaches Increase fatigue and reduce productivity Cause discomfort for visitors and staff in commercial spaces Maintaining clean air and well-ventilated spaces promotes a healthy, comfortable environment. Improve Efficiency and Reduce Costs Clean ventilation systems circulate air more effectively, reducing energy consumption for air conditioning and cooling. Regular maintenance prevents system breakdowns and costly repairs during peak summer usage. Efficient systems prolong equipment lifespan and save on operational expenses. Reduce Odours and Maintain Hygiene Summer temperatures can amplify odors from kitchens, waste areas, or accumulated dust. Routine cleaning: Removes grease, dirt, and microbial buildup Eliminates stale air and unpleasant smells Enhances overall indoor hygiene for staff, customers, and visitors Work with Accredited Specialists Using accredited contractors ensures summer maintenance is safe, compliant, and effective: VHR, BESA, and SafeContractor accreditation guarantees industry-standard cleaning Documented reports help satisfy TR19 compliance and insurance requirements Specialist contractors like Hey Service Group provide efficient, thorough cleaning with minimal disruption to business operations

HOW USING SPECIALIST CLEANING AND MAINTENANCE SERVICES CAN SAVE YOU MONEY

April 2, 2026
Reduce Energy Costs Dirty ducts, fans, and filters make ventilation systems work harder, increasing energy consumption. Regular cleaning and maintenance by specialists: Improves airflow and system efficiency Reduces electricity and gas bills Ensures HVAC systems operate at optimal capacity A clean, well-maintained system uses less energy, which directly translates into significant cost savings over time. Prevent Expensive Repairs and Equipment Replacement Grease, dust, and debris can damage motors, fans, and ductwork. Left unchecked, this leads to: Premature equipment failure Costly repairs or replacements Downtime that disrupts operations Specialist contractors provide thorough cleaning and inspection, identifying potential problems before they become costly emergencies. Avoid Regulatory Fines and Insurance Issues Using accredited ventilation cleaning services ensures compliance with TR19® standards, fire safety regulations, and health and safety law. Failure to maintain systems can result in: Regulatory fines and enforcement notices Rejected insurance claims Legal liability for accidents or fire Maintaining compliance prevents unexpected costs and financial risks. Minimise Operational Disruption Regular professional maintenance prevents breakdowns and system failures that could interrupt business operations. Specialist contractors offer: Scheduled cleaning with minimal disruption Emergency support for urgent issues Efficient service that keeps your business running smoothly Reducing downtime saves money by avoiding lost productivity and operational delays. Extend System Lifespan Routine ventilation cleaning and maintenance prolongs the life of your HVAC and duct systems. This reduces the need for frequent replacements, saving businesses thousands in capital expenditure over time. Benefits of Using Accredited Specialists Choosing VHR, SafeContractor, or BESA-accredited contractors ensures: Work is performed to industry standards Full documentation for compliance, audits, and insurance Safe and efficient cleaning practices that protect your staff, customers, and property Specialist contractors like Hey Service Group combine expertise with professional standards to deliver long-term savings and peace of mind.

HOW DOES INDOOR VENTILATION AFFECT STAFF, CUSTOMERS AND VISITORS?

April 2, 2026
Impact on Staff Health and Productivity Indoor air quality directly affects employee health and performance. Poor ventilation can lead to: Respiratory problems such as asthma, allergies, and infections Headaches, fatigue, and reduced concentration Increased absenteeism due to illness Businesses that maintain clean, well-ventilated spaces help staff stay healthy, alert, and productive. Effects on Customer Experience For businesses that welcome customers or clients, indoor air quality affects perception and comfort: Unpleasant odors or stuffy air can reduce satisfaction Dust or allergens in the air can trigger reactions Visible poor hygiene in ventilation systems can damage reputation Clean, well-maintained ventilation ensures a positive and safe environment, encouraging repeat visits. Safety and Compliance Considerations Neglected ventilation systems can contribute to health and safety risks: Circulation of airborne pathogens and allergens Increased risk of fire hazards in commercial kitchens due to grease build-up Potential regulatory violations under TR19® or other standards Using accredited contractors ensures compliance with regulations and provides documented evidence of safe practices. Long-Term Benefits of Good Ventilation Maintaining clean and efficient ventilation offers significant long-term benefits: Reduces employee sick days and absenteeism Improves indoor air quality and customer satisfaction Enhances overall workplace environment and wellbeing Lowers energy costs by keeping systems efficient Partner with Accredited Ventilation Experts Hiring a certified, experienced contractor ensures that ventilation systems are: Thoroughly cleaned and maintained Fully compliant with TR19® and other standards Professionally documented for audits and inspections Hey Service Group provides accredited ventilation hygiene services that protect staff, customers, and visitors while improving indoor air quality and operational efficiency.

HOW TO KNOW WHAT TO LOOK FOR IN A CONTRACTOR

April 2, 2026
What should I look for in a contractor? Check for Industry Accreditations Accreditations demonstrate a contractor’s competence, compliance, and professionalism. Key certifications to look for include: VHR (Vent Hygiene Register) – Ensures the contractor meets industry ventilation hygiene standards. SafeContractor Approved – Confirms health and safety compliance. BESA (Building Engineering Services Association) Membership – Shows adherence to professional and technical standards. EVHA (European Ventilation Hygiene Association) Membership – Demonstrates European-level ventilation hygiene expertise. Avetta Prequalification – Verifies risk management and compliance for corporate clients. Hiring an accredited contractor reduces the risk of non-compliance and guarantees high-quality work. Verify Experience and References A reputable contractor should have proven experience in commercial ventilation hygiene, including: Kitchens, offices, or industrial spaces Working with TR19® cleaning standards Handling inspections, audits, and reporting Ask for references or case studies to confirm consistent performance and reliability. Review Documentation and Reporting Professional contractors provide detailed, auditable reports after each service. These reports should include: Cleaning methods and processes Inspection results and before/after photos Compliance verification for TR19® and other regulations Documented reporting is essential for insurance, audits, and regulatory compliance. Assess Health & Safety Practices Contractors must follow strict health and safety procedures. Look for: Risk assessments and method statements (RAMS) Trained and competent staff Safe handling of hazardous materials, grease, and dust Health and safety compliance protects both workers and the business. Evaluate Service Scope and Flexibility Choose a contractor that offers: Comprehensive duct and extract cleaning Scheduled maintenance and emergency services Flexible service plans tailored to your business needs A contractor that can scale with your operations ensures ongoing compliance and system efficiency. Confirm Insurance and Liability Coverage A trusted contractor carries adequate liability insurance for fire, property damage, and personal injury. Always verify insurance documents before hiring to avoid potential financial risk.

TOP RISKS OF NEGLECTING YOUR VENTILATION SYSTEMS

April 2, 2026
What are the top risks of not cleaning a kitchen extract system? Fire Hazards Grease and debris in ducts and extract systems are highly flammable. Build-up over time can ignite and cause commercial kitchen fires, leading to property damage, injuries, and business disruption. Regular cleaning removes grease and reduces the risk of fire. Regulatory Non-Compliance UK businesses must comply with TR19® ventilation standards, fire safety laws, and health and safety regulations. Failure to maintain systems can result in: Fines or enforcement actions Rejected insurance claims Legal liability during incidents Using VHR, BESA, or SafeContractor-accredited contractors ensures documented compliance and adherence to industry standards. Poor Indoor Air Quality Dirty ventilation spreads dust, allergens, grease particles, and bacteria, negatively affecting employees and customers. Consequences include: Increased respiratory issues Reduced workplace productivity Uncomfortable or unhealthy environments Routine ventilation hygiene improves indoor air quality and creates safer spaces. Health and Safety Risks Neglected systems can expose staff and visitors to respiratory illnesses, allergies, and other health hazards. Maintaining clean ducts, fans, and extract systems helps prevent illness and reduces employee sick days. Equipment Inefficiency and Damage Grease and debris can clog fans, motors, and ductwork, leading to: Higher energy consumption Premature wear or system failure Increased repair and replacement costs Regular cleaning extends the life of ventilation systems and lowers operational costs.
More Posts