LEV Central

The Knowledge Base for LEV

P601/P604 LEV Report template

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So you’ve passed the P601 or P604 exam, congratulations! The next step is to submit two LEV Thorough Examination and Test Reports. It can be difficult to know where to begin when it comes to submitting two LEV Thorough Examination and Test.   This template has been developed over the years with experience of mentoring Oxyl8…

Video – “What Happens When a Centrifugal Fan Runs in Reverse”?

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Latest OXYL8 LEV training video on YouTube which shows what happens when a Centrifugal fan is incorrectly wired (ie phases the wrong way round) – a situation which is all too common (estimated that approx 7% are incorrectly wired). The key point to note – and shown very well on the video – is that…

Video – “How to Use the PITOT Tube”

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New OXYL8 training video on YouTube which provides an excellent introduction to the PITOT Tube, how to make the connections to a Manometer and how to take correct readings in a duct How to Use the PITOT Tube

P602 LEV Design – Manual Calculation sheet

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Glutton for punishment?  Then you will enjoy our Manual calculation sheet! This is for calculating pressure losses for the P602 course and comes with notes to aid the practice of these calculations.  We all rely on programs to calculate losses for us these days but you have to know this for your exam. Happy practising!…

LEV Glossary of terms

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This is a glossary of basic LEV terms: ACoP –  Approved code of practice. This carries greater legal weight in Great Britain courts than guidance. Aerodynamic diameter – The diameter of a unit-density sphere that has the same settling velocity in air as the particle in question. Air cleaner – A device also known as filtration unit which removes…

Basic Maths for LEV – Fan Laws

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If you have worked through Module 1 – then this one is just a little bit more challenging. This Module looks at the Fan Laws.  these are empirical, in that they are best considered ‘approximations’ to the real world but they do give you a clear picture of what will happen, for example, to the…

Fletchers Nomogram – Chart

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For Captor Hoods – Fletcher’s Nomogram chart for manual calculations of Hood Entry Velocity required to achieve a nominated minimum Captor Velocity at a chosen distance out from the hood (Captor Distance). All units must be in metric Select hood dimensions and calculate Aspect Ration (small dimension divided by large) Mark Aspect Ration on right…