Air Filters - Hygiene

Ductwork Cleaning

Kitchen Extract Cleans

Hygienic Maintenance

Site Surveys

Monitoring

System Balancing

Air Handling Refurbishment

Attenuator Replacement

Deposit Thickness Test (DTT)

Microbiological Tests

CFPDirect supply a comprehensive
Air Hygiene Programme in line with
1992 Health & Safety at Work Act
and compliance with the UK's
Insurance requirements.

Remember if you cannot find what
you require on the website,
please email:

enquiries@cfpdirect.co.uk

and we will source it for you.

Ventilation Hygiene
Air Filtration
Test Standards

Air Filtration Questions & Answers

Clean air filters ensure:

Optimum working efficiency of ventilation system
Minimal migration of dust down ductwork
A reduction of remedial cleaning
A reduction in energy costs
Clean and pleasant working environments

CFPDirect offer comprehensive Air Hygiene & Duct Cleaning programmes. In line with Government Legislation as laid down in the 1992 Health and Safety at Work Act and the UK insurance industries
on-going requirements.

Main areas of concern are:

Kitchen Extracts (Extreme fire hazard)
Food Manufacturing
Hospital Operating Theatres
Large Offices
Shopping Centres

CFPDirect can tailor a package to meet your requirements from degreasing a Kitchen Extract to a clinical clean of a hospital
operating theatre.

CFPDirect Air Hygiene programme includes:

Air Hygiene Risk Assessment which establishes any problems
that may exist.

Ventilation Systems cleaning and disinfection.

On-going monitoring and maintenance of the clean air side of air
handling systems.

Why should I have my ventilation system cleaned?

To remove contamination which:

Act as a nutrient for microbial activity
Soil expensive decor
Reduces ventilation efficiency
Increases energy costs (by up to 30%)
Can be a fire hazard
May cause staff absenteeism

1 2 3

Picture 1: Highly Inflammable Build Up On Ductwork

Picture 2: Ducting Prior to Deep Clean

Picture 3: Ducting Cleaned and Hazard Free

Do I have to have my dirty ventilation system cleaned?

YES. The workplace (Health Safety & Welfare) Regulations 1992, Regulation 6 paragraph 33 states: "Mechanical ventilation systems....should be regularly and properly cleaned, tested and maintained."

When must this be done?

All new or refurbished workplaces occupied after January 1993 must comply immediately.
Other existing workplaces must comply from 1st January 1996.

1992 Health and Safety at Work Act

These regulations are concerned with ventilation and air conditioning systems and are very specific in their requirements. Regulation 6, paragraph 33 states:

"Mechanical ventilation systems (including air conditioning systems) should be regularly and thoroughly cleaned, tested and maintained to ensure that they are kept clean and free from anything that might contaminate the air."

Furthermore, regulation 5 paragraph 22 requires that once the system has been cleaned, "A regular maintenance ( including as necessary inspection, testing, adjustment, lubrication and cleaning) is carried out at suitable intervals.

What are the benefits?

Reduced Fire Hazard -
A dirty supply or extract system, particularly a kitchen extract, is a definite fire or dust explosion risk. Once set alight the ductwork acts
as a huge chimney and the fire spreads rapidly. This hazard is compounded if the fire dampers built into the system, are inoperable through gross contamination and neglect.

The World Health Organisation's work on indoor air quality concluded that contamination of air accounts for a large proportion of both absenteeism and reduced work efficiency. It is possible that 5% of a company's staff cost are lost through absenteeism entirely due to the impurities and infections distributed
by a ventilation system.

Air Filters are designed to perform a variety of tasks, but the specific reason for their use are: CLICK HERE to see examples of the problems caused by poor levels of filtration.

To protect plant equipment from dirt ingress and "choking" with
large particulate matter, maximising efficiency and optimising equipment life. Standard Grade Filters EU3 to EU4 are selected for this function.

Visit our Panel Filters page or our Pad Holding Frames, Disposable Filter Media & Primary Air Filters page for more information.

To protect building internal decoration and fabrics against sub-micron carbon staining, therefore greatly extending periods
between costly refurbishment and providing a healthier working environment for employees. Medium to High Grade Filters EU5 to EU8 should be selected.

Visit our Dura Pak Bags page for more information.

To provide ultimate protection for manufacturing processes with the aim of eliminating the risk of contamination. Such applications include: food processing, pharmaceutical industry, microelectronics and power stations. High Grade Filters through to HEPA Filters should be used. Selection with specific requirements.

The standard method for comparative testing to evaluate performance of air filters in general ventilation and air conditioning is BS6540
(EN779: 1993, European Standard). The test consists of two parts:

A) The synthetic dust weight arrestance test - providing an
arrestance value when the filter is fed with a blended synthetic dust.

B) The atmospheric dust spot efficiency test - giving an efficiency value produced using an atmospheric staining technique.

The above tests are used to obtain the following values:

Initial pressure loss - Resistance to air flow caused by the
filter in its clean state.
Initial arrestance - The effectiveness of the filter against
larger particulate matter in its clean state.
Average arrestance - As above but expressing the average effectiveness of the filter through its life.
Initial efficiency - The efficiency of the filter against carbonaceous staining contaminant in its clean state.
Average efficiency - As above, but stating average efficiency throughout filter life.
Final pressure loss - The final resistance to which the filter is tested. *(This value is stated by the test sponsor).
Dust holding capacity - The amount of synthetic dust retained by the filter up to the final pressure loss.