Ventilation Hygiene - Duct Cleaning Services

Specialist Deep Cleaning Services

Crystal Surface Ltd offers a wide range of technical cleaning designed for the UK's food and facilities management industry. We keep your business protected. You are compliant, hygienically clean and safe in respect of regulations and insurance company requirements. Indoor air quality is a very real health issue and a clean, fully functional ventilation system is paramount.

Our services include:

Ventilation Hygiene

Kitchen grease extract system cleaning
Duct Cleaning - fresh air supply & extract ductwork
Pre-commission ductwork cleaning
Installation of access doors

Ventilation Solutions

Fan unit supply, installation and repair
Ductwork modifications and minor repairs
Fire damper testing & cleaning
Filter supply
Filter laundry service

Kitchen Deep Cleaning
Grease Trap Cleaning
High Level Cleaning​

Ventilation Cleaning 

Kitchen extract systems are the most complex and problematic commercial ventilation systems, with canopies, filters, fans and sometimes odour and noise control units as well. Supply air systems, which are needed to replace the volume of air removed by extract fans, usually consist of fans, grilles, air diffusers, and sometimes filters and heat recovery units. Crystal Surface Ltd can clean, inspect and report on commercial ventilation systems in kitchens, washrooms, laundry rooms and more.

Ventilation System Cleaning - Kitchen Extract Duct Work Cleaning

Grease builds up in kitchen extract systems, and it is a fire hazard. Your ductwork, filters and other ventilation add-ons may also be a source of unpleasant odours and unwanted noise, especially if they have design flaws or are not properly maintained. To keep the air in your commercial kitchen fresh and the vents free of flammable grease, the ventilation system needs to be cleaned thoroughly and regularly. This includes regular technical cleaning services for the fry range, ducts, canopies, filters, fans, etc.

Crystal Surface Ltd provides an industry leading duct cleaning service because we are at the forefront of the industry and leading innovations. We also understand your ventilation system and unlike other duct cleaning companies have qualified personnel who can make modifications to it, if necessary. For example, we can replace and modify ductwork as well as replace faulty fans. We also routinely install access doors according to BESA TR19.


At Crystal Surface Ltd we don't just clean; we offer advice and guidance on ventilation systems and related regulations and standards. Our work is compliant with:

BS EN 15780:2011 Ventilation for buildings - ductwork - cleanliness of ventilation systems
Regulation (EC) 852/2004 on the hygiene of foodstuffs, 29 April 2004
BESA TR19, second edition: Internal Cleanliness of Ventilation Systems

These guidelines and regulations set high standards for the cleanliness of commercial kitchen extract systems and supply air. Our team includes highly skilled and fully qualified ductwork engineers, ensuring that reporting, compliance and cleaning are carried out according to industry best practices. As a member of the Building & Engineering Services Association, we are regularly audited to ensure our systems are in line with the recommended standards. Our cleaning services lower the risk of fire, create a safer workplace for your team, and provide a better dining environment for your guests through improved indoor air hygiene.

Well Documented

Crystal Surface Ltd extract system and ductwork cleaning service includes detailed documentation. We provide our clients with complete pre-clean and post-clean reporting on ventilation systems, including before and after photographs. We can help you with certification, and we always keep master documents on file. Our clients feel safe in the knowledge that their kitchen extract systems meet industry standards and are as hygienically clean as possible.

Other Ventilation Systems

Crystal Surface Ltd can also keep the fans and extract systems in your toilets and laundry area clean and well maintained. This includes the laundry extract, toilet extract, grilles, louvres, fans and diffusers.

Ventilation Solutions

Crystal Surface Ltd has the expert staff needed to inspect, clean, modify and report on commercial ventilation extract and supply systems.

Fan Unit Supply, Installation and Repair

Crystal Surface Ltd can advise, specify and supply a diverse range of kitchen fan units. We can provide you with extract fans that are specifically designed to meet the requirements of a busy commercial kitchen. We understand that every operation has unique needs, so we supply and install a fully appropriate solution or introduce you to our expert service partners who can support you at a level above us.

Crystal Surface Ltd provide an emergency kitchen fan repair service that will minimise your down-time when disaster strikes! Of course, our regularly scheduled cleaning services greatly reduce the risk of a break-down.

Fire Damper Testing, Inspection & Cleaning

Fire dampers are mechanisms located in ducts where they pass through fire walls and fire-rated floors; they are designed to close automatically if there’s a fire. Without working fire dampers, fire barriers are ineffective, so keeping them fully functional is vital for fire safety. Crystal Surface Ltd can keep your fire dampers clean, and we also inspect and test them to make sure they are fully operational.

Ductwork Modifications and Minor Repairs

Our Technicians are familiar with the standards for the design and maintenance of ductwork (BESA DW172), and when they spot a problem, they know how to fix it. From missing access doors to split seams, to condensation issues, our people can do any work that’s needed to make your ducts safer, more effective, easier to maintain and complaint with legal and insurance requirements.

Filter Supply

Crystal Surface Ltd supply a range of commercial grease filters for kitchen extract systems. Kitchen extract filters provide essential flame barrier protection between the cooking area and ducts, helping to prevent duct fires. They also act as the first stage of both odour control and air purification. Simply put, filters are used to reduce grease travelling from the cooking area up into the extract duct, and subsequently remove that grease from the extracted air in the canopies.

There are many different types of filters, but in the catering industry, mesh and baffle filters are the most common. We highly recommend using baffle filters for primary grease filtration and many experts in the commercial kitchen ventilation system business agree, including the BESA and NAAD, the UK's leading associations for the HVACR industry.

Filter Laundry Service

Crystal Surface Ltd filter laundry service keep your kitchen extract filters clean and free from grease build-up. We can add our filter laundry service on to your regularly scheduled ventilation system cleaning.

Other Technical Cleaning Services
Kitchen Deep Clean

Our full-service kitchen deep clean includes grease extract systems, supply air systems, catering equipment and fabric, including floors, walls and ceilings.

When Crystal Surface Ltd carry out a kitchen deep clean, we strip everything back. Then, using environmentally safe chemicals that have been specifically formulated for us, we clean into the corners of all your walls and floors to remove grease and contaminants.

As always, we will work around you; we don't expect you to work around us. We clean equipment to the highest possible standard and immediately afterwards, all the equipment is ready to use. We can customise our deep cleaning services service for your business. Just call or e-mail.

Grease Trap Cleaning

Crystal Surface Ltd can clean the grease trap that's attached to your waste water system. We use enzyme-based detergent for a long-lasting and complete clean. Like vent cleaning, grease trap cleaning is a fully documented service.


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