LEV Inspection & Testing in Johor Bahru
Annual examination and testing of local exhaust ventilation under USECHH 2000 — conducted by a DOSH-registered hygiene technician, with the monthly inspection records your team needs between tests.
Extraction that still works, and proof that it does
Local exhaust ventilation is the engineering control that captures fumes, vapours and dust at source — solvent wiping stations, spray booths, welding bays, mixing and grinding points. Under regulation 17 of the USECHH Regulations 2000, it must be examined and tested by a hygiene technician at intervals of no longer than twelve months, and inspected by the employer at intervals of no longer than one month.
LEV systems deteriorate quietly. Filters load up, ducts get dented or disconnected, a hood is moved to make room for a new fixture, a fan belt slips. The fan still runs and the system looks fine, while capture at the hood has dropped to a fraction of its design.
Our LEV testing is conducted by a DOSH-registered hygiene technician for factories across Johor Bahru, Pasir Gudang, Tebrau, Senai, Kulai and Iskandar Puteri. ProSafe schedules it, keeps the records and follows the deficiencies through to repair.
Annual Examination & Testing
Performance measured against design or baseline by a DOSH-registered hygiene technician.
Monthly Inspection Records
A practical checklist and log for the employer inspection the regulation requires every month.
Deficiency Follow-Up
Defects found in testing tracked to repair and retest, not left to the next annual cycle.
Linked to Your CHRA
LEV results read alongside your CHRA, so the controls it relies on are known to be working.
What gets tested
Hood capture
Capture or face velocity at each hood, and whether the hood is still positioned where the contaminant is released.
Ducting
Duct velocity and static pressure along the system, and physical condition — dents, leaks, disconnections and build-up.
Fan performance
Whether the fan is delivering the volume the system was designed for, and the condition of motor, belts and housing.
Air cleaning devices
Filters, scrubbers and collectors, including pressure drop across them as an indicator of loading.
Comparison to baseline
Results compared with the design specification or the previous test, so deterioration is visible rather than guessed.
Report & records
A test report for each system and a register of every LEV on site with its next due date.
Is this you?
- You have extraction on site— spray booths, fume hoods, welding extraction, dust collection — and no test in the last twelve months.
- Your CHRA relies on LEVto control exposure, and nobody has confirmed it still performs.
- There is no monthly inspection recordeven though the regulation requires one.
- The system was modified— hoods added, ducting rerouted, a new branch connected — without retesting.
- Operators complain of smell or hazeat stations where extraction is supposed to be working.
The test, and everything around it
The annual test is the part the regulation names, but it is not where most LEV compliance fails. It fails in the months between tests — no monthly inspection record, a defect found and never fixed, a system modified and never retested.
So we set up both halves. The annual examination and testing is conducted by a DOSH-registered hygiene technician. ProSafe builds the register of every system on site, puts a monthly inspection checklist in your team's hands, and follows each deficiency through to repair and retest.
We do not design, fabricate or install ventilation systems. Where testing shows a system needs redesign, we tell you what has to be achieved so your ventilation contractor has a clear specification to work to.
How LEV testing runs
System Register
We list every LEV on site, collect available design data and previous test reports, and agree a test date around your production.
Examination & Testing
The DOSH-registered hygiene technician measures performance at hoods, ducts and fan, and inspects physical condition throughout.
Report & Repairs
A report for each system with deficiencies ranked, then each defect tracked through repair and retest.
Monthly Inspections
A checklist and log your team maintains between tests, with the next annual due date on the calendar.
LEV inspection — common questions
How often must an LEV system be tested?
Under regulation 17 of the USECHH Regulations 2000, engineering control equipment such as LEV must be examined and tested by a hygiene technician at intervals of no longer than twelve months. Separately, the employer must inspect it at intervals of no longer than one month.
Who can carry out LEV examination and testing?
A hygiene technician registered with DOSH in the category covering LEV — commonly referred to as Hygiene Technician 2 (HT2). Our LEV engagements are conducted by a DOSH-registered hygiene technician, with ProSafe managing scheduling, records and follow-up.
What is checked during LEV testing?
Whether the system still captures the contaminant it was designed to capture. That typically means hood capture or face velocity, duct velocity and static pressure along the system, fan performance, and the physical condition of hoods, ducting, dampers and air cleaning devices, compared against the design or the previous test.
What does the monthly inspection involve?
A visual and functional check by the employer: the system is running when the process runs, hoods are positioned correctly, ducting is not damaged or blocked, and there are no obvious signs of reduced extraction. It does not need a registered technician, but it does need to be recorded. We set up a checklist and record your team can maintain.
What happens if the LEV fails the test?
The report identifies where performance has dropped and why — a blocked filter, damaged duct, worn fan belt or a hood moved away from the source are common causes. Until it is corrected, employees may be exposed above what the CHRA assumed, so the defect should be repaired and the system retested rather than left to the next annual cycle.
Do we need LEV at all?
That is decided by the Chemical Health Risk Assessment. Where the CHRA finds that exposure is not adequately controlled, LEV is often the recommended engineering control. If LEV is already installed, the testing requirement applies to it.
Where we work
We arrange LEV testing for factories across Johor Bahru, Pasir Gudang, Tebrau, Plentong, Masai, Skudai, Senai, Kulai, Iskandar Puteri and Gelang Patah. Testing is scheduled around your production so systems are measured under normal operating conditions.
When was your LEV last tested?
Tell us how many extraction systems you have and the date of the last test report. We will tell you what is due and when.