On 1st February 2023, PTSG was delighted to announce the acquisition of Indepth Hygiene Services Ltd (Indepth) – one of the UK’s leading specialist fire safety companies. Indepth’s core service offering includes fire damper maintenance and grease extract ductwork cleaning.
The acquisition has extended the Group’s Fire Solutions offering and is highly complementary to the other services within this division. PTSG Fire Solutions Ltd now includes a mechanical fire business comprising: UK Dry Riser Maintenance, UK Dry Riser Installations, UK Sprinklers, M+P Fire Protection and Pure Power. Trinity Fire and Security Systems delivers the Group’s electrical fire and security services. Neo Property Solutions Ltd and now Indepth give PTSG a comprehensive portfolio of passive fire services for customers in a wide range of industry sectors.
Two of the most significant new services that Indepth has brought to PTSG are Fire and Smoke Damper Inspection and Testing and Grease Extract Ventilation Cleaning:
Fire and Smoke Damper Inspection and Testing
Regular fire damper testing from PTSG Fire Solutions Ltd gives peace of mind that if the worst were to happen and a fire were to break out, there is less chance of it spreading throughout the building. Fire dampers should be tested upon installation and then once every year.
Fire and smoke dampers are located in your ductwork system at any point where the ductwork breaches the fire compartment.
Dampers are essential in preventing the spread of fire and smoke, and the law sets out clear rules and guidance for their inspection, testing and maintenance.
What is the fire compartment?
Your building is made up of several fire compartments to prevent the spread of smoke and fire. Each is designed to contain smoke and fire for a period of time; this is referred to as the fire rating. Compartments are typically entire floors of buildings, but in larger buildings and purpose-built structures, such as hotels, a compartment can also be a single room.
What are dampers?
Ductwork runs throughout your entire building, providing fresh air and heat. Where it is necessary for ductwork to breach the fire compartment a fire damper is installed. There are several types of damper, but the principle of how they work is the same. In the event of a fire, a fire damper closes to maintain the fire barrier, bridging the gap in the fire compartment, whereas smoke dampers open or close to control the pathway of smoke.
Typically, in a space of 1,000 sq. m. we would expect to find between 40 and 80 dampers. This can be significantly higher depending on the layout or design of the building and the compartmentation.
Your duties
The legal requirements for fire and smoke damper inspection and testing are clear. The Regulatory Reform (Fire Safety) Order 2005 clearly sets out that it is the employer’s responsibility to maintain their fire safety systems. Your dampers are a key part of your fire safety system.
What is required?
You must first identify all the dampers in your building. This is done using your schematics or, if required, a physical inspection can be undertaken.
As dampers are located throughout your ductwork it is essential, and a legal requirement, that they are accessible. Builders’ hatches and access panels may need to be installed; our team can assist with this as part of our complete service.
To achieve compliance, it is imperative that all dampers are located and then tested.
What is involved in damper inspection and testing?
A visual inspection of your dampers will identify surface damage or anomalies in the installation. Many contractors simply don’t understand the function of smoke and fire dampers and can inadvertently impair their operation.
Our teams have discovered dampers that have been installed upside down – which would make them inoperable as many dampers require gravity to function. Others have been incorrectly installed, with extensive damage to the fire compartment, making them ineffective and the whole system non-compliant. Interesting discoveries include a fork and spoon holding the damper open (we never did find the knife). One of the most shocking findings was Unistrut fixed to dampers to permanently hold them open – yes, somebody paid a contractor to ruin their fire safety system. We regularly see other services using dampers as conduit for networking cables and similar.
If you choose to work with Indepth our team will not only identify issues like these, but also help you to find solutions. We will not simply leave you with a report stating your system is not compliant.
Once identified, our team will test each damper. A drop test checks that the damper will operate should a fire break out. The mechanism which releases the damper, usually a fusible link or thermal spring, is manually activated and we check that the damper closes completely. We then reset the damper to ensure it is ready for operation.
A visual inspection and complete testing are your reassurance that your system is fully operable, and it is the only way to achieve compliance.
Reporting
Our team have developed an industry-leading fire damper inspection and testing reporting platform. It was built to comply with the standards set out in BESA Technical Bulletin VH001. You can learn more about VH001 here.
Whereas standard reporting will give you a list of issues identified, our reporting goes further. We provide you with comprehensive details of all dampers tested, including photographic evidence of the damper before, during, and after testing.
If any issues are identified, we provide further photographs and advice on remedial steps, including detailed costings.
Grease Extract Ventilation Cleaning
This is an important service provided by our technicians in PTSG Fire Solutions Ltd. Building regulations require that commercial kitchens have suitable extraction to reduce heat and remove smells. Eliminating the risk of fire is also of paramount importance. The system itself will comprise a canopy and a fan, required for the extraction of air and particles and ductwork that leads to an external vent.
Extracting grease from the kitchen
The canopy will be positioned directly above the cooking area and will include a series of filters to capture grease particles. In reality, much of the grease will be extracted with the steam from cooking, passing through the first filters. These grease particles travel through the ductwork and adhere to the internal surfaces. Over time, grease will accumulate, presenting a significant fire hazard.
More dangers from grease accumulation
Apart from the fire risk, the accumulation of grease in the kitchen extract system reduces ventilation efficiency by restricting the movement of extracted air, resulting in overheating, excessive humidity, possible failure to remove noxious fumes from gas-burning appliances, and a continuing source of unwanted odours which can permeate the rest of the building. Uncleaned extract systems also provide the perfect environment for rodent infestation.
A potential risk to the whole building
Grease extract ductwork often stretches through the entire length of a building to reach a roof-level exhaust, so uncleaned ductwork can put not only the kitchen occupants at risk from fire, but also the whole premises.
How we help
Our team will thoroughly clean your entire canopy, changing filters where required and cleansing your extraction system through to the exterior ventilation.
We can install all necessary access panels, including fire rated panels where required.
Our methodology and reporting are in accordance with rigorous industry standards TR19® Grease Specification for Fire Risk Management of Grease Accumulation within Kitchen Extraction Systems, and Fire Protection Association (FPA) RC44 recommendations for fire risk assessment of catering extract ventilation.
Specialist testing for solid fuel appliances such as Robata and Josper grill extracts
Robata and commercial charcoal grills require a specialist type of ventilation designed to not just remove condensation and smells, but to prevent or reduce the level of hazardous substances such as dust, fumes and contaminants.
The rigorous health and safety rules around the use of these types of grill and the necessity for specialist extraction means the system requires additional testing. Learn more about Local Exhaust Ventilation (LEV) Testing here.
Fire safety cleanliness certificate
We provide an insurance industry-approved Fire Safety Cleanliness Certificate and detailed post-clean report on completion of the work. As evidence of grease extract ductwork cleaning, this certificate can be shown to insurers and Fire and Rescue Service inspectors.
Your legal obligations
The Workplace (Health, Safety and Welfare) Regulations 1992 and the Regulatory Reform (Fire Safety) Order 2005 requires the grease extract ventilation system is included in the fire risk assessment and action taken to eliminate any potential risk to building occupants from potentially fire-hazardous grease deposits in the ducting.
