Ventilation System Deep Cleaning

Condition survey reports

It is essential to ensure you know what condition your kitchen extract ductwork is in.

Failure to ensure compliance to legislation and possible insurers demands can lead to both prosecution and possible void insurance.

Due diligence and duty of care must be proven and without regular and comprehensive audits, surveys and cleaning this is extremely difficult to accomplish.

You may think your incumbent contractor is providing compliance but when was the last time you commissioned or carried out an independant audit or condition survey?

Example before and after images

Extract canopy before

Extract canopy after

Dirty kitchen extract canopy

Extract canopy after cleaning

extract canopy before cleaning
Extract canopy after cleaning

Extract ductwork before


Extract ductwork after

 ductwork before cleaning ductwork after cleaning 
 ductwork before cleaning ductwork after cleaning 

Extract fan before


Extract fan after

fan before cleaning   fan after cleaning
 fan before cleaning  fan after cleaning

Ventilation System Deep Cleaning

Prevention is better than cure so ensure you comply with legislation by bringing the professionals in to clean ductwork and provide deep cleaning for ventilation and air conditioning systems.

Grease and oil particles in a kitchen ventilation system can accumulate creating a fire hazard. So if you own or manage the premises, carrying out fire risk assessments for your kitchen extract system is not only essential, it's the law according to the Fire Regulatory Reform Act 2005.

We have extensive experience of duct cleaning, ventilation system cleaning and the cleaning of clean air systems to a recognised industry standard - B&ES (formerly known as HVCA) TR/19 - which means the building's ventilation system is well maintained, an essential requirement for securing and maintaining insurance policies.

In order to meet the standards promoted by the B&ES TR/19 protocol, you must have a regular cleaning programme in place to reduce the risk of fire. This table shows recommended cleaning frequencies for kitchen extract ventilation systems based on kitchen operating hours as advised in B&ES TR/19.


Perceived level of grease production


Typical example

Cleaning intervals (months) daily usage

Uo to 6 hrs

6-12 hours

12-16 hours

16+ hrs



No significant production of grease laden aerosols during normal daily food production operations











Moderate production of grease laden aerosols during normal daily food production operations











Heavy, significant or continual production of grease laden aerosols during normal daily food production operations











All of our operatives are trained and licensed for rope access by IRATA (International Rope Access Trade Association) and to IPAF (International Powered Access Federation) standards, for the use of MEWPs (Mobile Elevating Work Platforms), and are skilled in the fitting of access doors.

Prior to commencement of works and upon receipt of an official works order we will provide RAMS (Risk Assessment and Method Statement). Once the specialist cleaning work has been undertaken, our comprehensive service comprises detailed reports and evidence including:

  • Digital images before and after works are carried out, as above
  • Hygiene validation certificates
  • System diagram showing access points and areas cleaned.

Please ask for more details on our comprehensive service as outlined above.

To ensure your air conditioning systems, vents and grills allow air in and extract out without a hitch - and without risk - contact the Diverse Cleaning Company South Ltd on0239 266 8600.


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"Diverse Cleaning are very professional and efficient with a broad base of skills and the capacity to react quickly to new challenges. I have found them resourceful and very competitive and would not hesitate in recommending them as an excellent specialist deep cleaning service provider."
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