OXYL8 LEV Captor Hood App

App Screenshot jpg 203x340 - OXYL8 LEV Captor Hood App
App Screenshot jpg 612x1024 - OXYL8 LEV Captor Hood App

This is a screenshot of the FREE OXYL8 LEV Captor Hood Design/TExT Assessment App.

The App can be used by Designers to calculate the required Hood Entry (Face) Velocity for a given hood style/size and Captor Distance requirement.

It can also be used by TExT Examiners to calculate the Effective Captor Distance for a hood if the hood details such as size, shape and Face Velocity are known.

To download the App go to Play Store (Android) or iStore (Apple) and search “OXYL8”.

LATEST LEV Jobs ! – Time for a Change?

LEVJobs Banner NEW 340x166 - LATEST LEV Jobs ! - Time for a Change?

LEVJobs Banner NEW 340x166 - LATEST LEV Jobs ! - Time for a Change?Time for a Change? Looking to Move Up?  Start a new Career in LEV?

The LEV job market is very buoyant at the moment with more employers looking for suitable candidates than ever before.

Below is a current listing of some of the jobs available for viewing on our sister website at:- LEVJobs.com

Vacancies span the range from fully qualified, skilled and competent LEV operators through to new entrants/improvers.

LEVJobs.com is the dedicated forum for placing LEV Job adverts and posting CVs.  Remember too – it is still entirely free for employers to post adverts – and for candidates wishing to post (anonymously) their details.

  • Thinking of a change?
  • Interested to set out in a new career in LEV?
  • First port of call is always https://levjobs.com
  • Bookmark LEVJobs as new vacancies constantly being added!

Click on Job Titles below to view full Job Advert details:-

LEV Test Engineer                                      Scotland

Trainee LEV Test Engineer                     Ireland, SW, SE

LEV Test Engineer (Offshore)                Offshore

LEV Technician                                             Midlands, NW

LEV Technician                                             NE

LEV Design Engineer                                 UK wide

Duct Installation Engineer                     UK wide

Installation Engineer (LEV)                    UK wide

LEV Engineer                                                 SE

Proj Engnr LEV (Graduate)                      SE

Trainee Sales Engineer (LEV)                 Midlands

Mech Proj Engineer (LEV)                       Midlands

LEV Test Engineer                                        Midlands

Occupational Hygienist                            Midlands, NW



HSE on the Warpath?

Abstract Smoke Image of Lungs

Wig and Books 2 - HSE on the Warpath?Two recent prosecutions by HSE against companies who failed to protect their workers from exposure to harmful substances shows that they are still targeting Exposure Controls (LEV) – and the lack of them.

First up was a Furniture manufacturer who were fined £8000 with £1000 costs for exposing their employees to significant quantities of hard wood dust, a hazardous substance known to cause occupational asthma and nasal cancer.

The second case was against a Design and manufacturing company (£12,000 fine; £6,000 costs) after an employee developed occupational asthma as a result of inhaling fumes from a soldering operation.  Most soldering involves fluxes containing Rosin or Colophony, which is a known asthmagen.

OXYL8 LEV “Easter Eggs”

Colourful Easter Eggs

Easter2 - OXYL8 LEV  "Easter Eggs"We SpaceX - OXYL8 LEV  "Easter Eggs"here at OXYL8 are great fans of Elon Musk (Space-X, Tesla etc) and he has just our kind of humour. In his Hi-Tec stuff be hides what he calls ‘Easter Eggs‘ in the software; for example extra features, musical oddities, information etc.

Over the coming months we are going to ‘hide’ Easter Egg codes on our site.

They will be numerical or alpha-numerical codes which – when you see them – will be clearly out of kilter with the text or section of the site page in which they are embedded.

Easter Eggs? Well as we are fast approaching Easter we thought we would start the first one with exactly that – a nice chocolate Easter Egg.

But from there we have some other interesting ideas such as secret LEV Apps, discount vouchers for use on OXYL8 LEV Training Courses, Discounts to stay at Lochan Lodge etc

If you see an Easter Egg Code – to claim the ‘Egg‘ simply send us the code using this form:- Contact Form

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.