OXYL8 Videos

OXYL8 have launched our production of a series of short LEV training video clips and these will be uploaded as they become available – so do keep checking back to see what we have added.

In the pipeline are short clips on the following subjects:-

  • Using Hot Wire and Rotating Vane Anemometers
  • Proportional Balancing
  • Drilling Test Holes (size, positions etc)
  • Transport Velocity – visual of deposition occurring in a ‘see-through’ section of duct
  • Effect of Flexible Ducting on Pressure Drops

Please let us know of any requests for topics you would like to see tackled in our series of short clips?

Video 1    

How to Use the PITOT Tube


Video 2    

What Happens when Centrifugal Fans Run in Reverse?


Video 3    

How do Captor Hoods Work – Theory and Design Equations?

Download the Excel Spreadsheet:- Fletchers Nomogram Calculations – to go with this Video


Video 4 

How to Measure Captor Hood Control Distance

Download the Excel Spreadsheet:- Fletchers Nomogram Calculations – to go with this Video


OXYL8 Produced Video Clips are in continuous Production.

Please check back regularly or follow us on Facebook/YouTube Channel for updates

17 LEV-Related Video Clips by HSE



At OXYL8 we appreciate that sometimes a delegate will attend one of our LEV Training Courses and then, following success in the exams ….. finds they are a bit out on their own on such issues as (for example) the practical side of conducting LEV testing.  Maybe needing a bit of confidence/support …..?

In addition some time may have elapsed between success in the exams and preparing Case Studies/Reports etc

To address these issues we have a group of very approachable LEV Experts who can Tutor/Mentor the delegate in these topics as required.


On a practical level the Mentors may (by arrangement) permit a delegate to ‘shadow’ them on actual site LEV Examination and Testing work where the delegate can gain additional practical experience under the guidance of a friendly, supportive Expert.

Tutors/Mentors may also be able to offer one-on-one tutoring on matters related to the completion of Case Studies/Reports etc – please NOTE – they cannot do your Case Studies or Reports for you – but the Tutor/Mentor can provide additional teaching/tutoring in areas where the delegate is experiencing some difficulties (eg maths, identifying faults etc).

This additional one-to-one Tutoring will come at a small (very reasonable) cost and can often be undertaken using Skype etc rather than face to face meetings.


Airducts Eng 340x128 - Mentoring/TutoringCompetence:  13 years’ experience now Designing, project managing, purchasing, LEV testing, commissioning, balancing & servicing of Local Exhaust Ventilation plant.

Holder of BOHS full suite of Accreditations P601, P602, P603, P604 & W201.  Also hold site specific safety qualifications such as IPAF, Forklift, various awareness certificates.

What can I offer OXYL8 delegates:

·         Friendly practical advice.

·         Access to sites/LEV Plant for the purposes of writing reports for attaining the P601 & P604 Certification.

·         Accompany delegates on site to undertake the Thorough Examination and Test of LEV Plant re attaining the P601 & P604 Certification.

·         Field based LEV training/supervision to gain experience in testing LEV.

·         Desktop review of LEV reports.

·         Design of LEV Plant.

·         Control Reviews.

Louise Woods


Professional Development

LEV Competence Text

Competence 1 340x227 - Professional DevelopmentThe CoSHH Regulations provide a starting point in they demand anyone involved in LEV activities should be “competent” (without actually defining the word “Competent”).  

However, of significant importance to LEV specialists is an interesting legal difference in UK law where it considers “competence“.  

And that is ……. the onus is on the professional to prove his or her “competence” rather than any accuser (eg HSE) having to prove that they are not Competent (called – the reversal of the “burden of proof” in law).

Recent HSE activities and declarations have shown that they are intent on addressing the level of competency in our industry.  

Let there be no doubt – there is change afoot!

So!  Now is the time to keep abreast of the Professional Development options and opportunities.  If you would like to read more on this subject – see our News Post:-  Professionalise to Survive

In the sections below we will try to summarise the various Professional Development options and the requirements to attain the various levels of recognition.

Please do provide feedback on your experiences with Professional Development and of other options which you might recommend.

Blue logo web version - Professional Development

BOHS has been at the forefront of initiating and developing LEV training qualifications for many years.  They have a suite of “Proficiency” LEV courses which are listed in their P600 series.

These BOHS courses are probably recognised as the UK’s ‘standard’ for LEV related qualification in the UK.

In addition BOHS jointly with ILEVE (see below) promote the P604 training course.  Delegates who complete P601, P602, P603 and P604 may then proceed to gaining ‘post nominal’ recognition by the award of Certificate in Operational Competence (Control) – also known as CoC(Control).

My personal view is that ‘in time’ the CoC(Control) qualification/award – or something like it – will become the ‘de facto’ standard required for those specialising in LEV.


SOE Logo 1 - Professional DevelopmentSOE works to advance Operations Engineering and establishes and maintains standards of competence and conduct for those engaged in Operations Engineering.

For LEV specialists – the SOE has a sub-branch – the Institute of Plant Engineers (IPlantE).

Members can join as Associates of SOE/IPlantE on-line – Join SOE

Through the SOE members can be put forward to the Engineering Council for the awards of Eng Tech, IEng and CEng appropriate to their qualifications and expertise/experience.

Personally I have found the SOE to be very friendly, supportive and approachable.  A great Institute to start your professional engineering route towards Eng Tech, IEng and CEng.


ILEVE Logo - Professional DevelopmentILEVE was been established to promote air quality in the workplace and to reduce ill health and death due to airborne contamination and hazardous substances in the working environment.

It was set up to be the representative body for LEV specialists and its aim was to provide a focal point for LEV topics, professional development, career advancement and representation for the industry.

ILEVE has been set up under the umbrella of CIBSE (The Chartered Institution of Building Service Engineers).

Following the initial excitement of ILEVE’s inauguration it has been a criticism that some of the ‘steam’ ran out of the Institute’s progress however ILEVE is now operating with a new invigorated Management Team who have set out their re-energised mission and aspirations.


Pre-Course Reading

Pre-Course – guides and resources which may assist delegates by providing an introduction to the topics and contents of our LEV and Occupational Hygiene courses.

Use the links etc to view the materials.

Note:- in most cases printed copies will be included as part of the course handouts.

Maths Pre-Course Revision v18.1

HSE HSG258 “Controlling Airborne Contaminants at Work”   HSE’s definitive LEV guide.  Not a course pre-requisite but will provide a good background introduction to the topic.

MDHS82-2 “The Dust Lamp” 

Maths Pre-Course Revision v18.1

HSE HSG258 “Controlling Airborne Contaminants at Work”– Both P601 and P602 are structured around this HSE Guide.  A hard copy given as part of the LEV course materials

MDHS82-2 “The Dust Lamp”

ACGIH Manual “Industrial Ventilation – Manual of Recommended Practice for Design”  Not provided as course materials but a hard copy can be purchased by following the link.

HSG 53 “Respiratory Protective Equipment” – hard copy given as part of course materials.

HSG 193 “Technical Basis for CoSHH Essentials” – hard copy given as part of course materials.

INDG 174 “Personal Protective Equipment at Work” – hard copy given as part of course materials.

HSG 262 “Managing Skin Exposures at Work” – hard copy given as part of course materials.

ATEX and Explosive Atmospheres – hard copy given as part of course materials.

HSG 103 “Safe Handling of Combustible Dusts” – hard copy given as part of course materials.

INDG286 “Diesel Engine Exhaust Emissions” – hard copy given as part of course materials.

INDG370 “Controlling Fire & Explosion Risks in the Workplace” – hard copy given as part of course materials.

MDHS82-2 “The Dust Lamp” – hard copy given as part of course materials.

BOHS P604 Post Course Commissioning Reports Guidance – hard copy given as part of course materials.

W201 Student Manual etc – No need to print as printed copies given out on course.

MDHS14-4 “General Methods for Sampling and Gravimetric Analysis of Respirable, Thoracic and Inhalable Aerosols” – hard copy given as part of course materials.