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Does my extraction system need an LEV test?

Equipment and work · Question 1 of 3

What airborne contaminant does the system control?

Include contaminants generated by the process, not only substances bought in. Choose every relevant type.

Business or industry

What airborne contaminant does the system control?

Wood dustSawing, sanding, routing or machining timber and boardsWelding or metal fumeWelding, soldering, brazing, plasma cutting or thermal workSpray mist or coatingPaint, powder coating, adhesives or other sprayed productsStone, silica or construction dustCutting, grinding or shaping mineral materialsMetal dustGrinding, polishing, finishing or additive manufactureSolvent or chemical vapourVapours released from a process, bath, vessel or cleaning activityLaboratory or pharmaceutical contaminantFume cupboards, microbiological cabinets or contained process workOther airborne contaminantAnother dust, fume, mist, smoke, gas or vapourNo contaminant identifiedUse only if the equipment is general ventilation rather than source capture

Choose an industry and at least one equipment or work type.

More help with LEV testing

Use these when you need more detail before appointing someone. This questionnaire is decision support, not a professional assessment or a legal determination.

Buying toolkit and quote checklist →Supplier evidence directory →

Guides, technical explanations and references

Duty and technical sources

COSHH regulation 9 requires control measures to be maintained. Most LEV systems must be thoroughly examined and tested at least every 14 months, with shorter maximum intervals for specified processes.

HSE LEV FAQs — Duty, intervals and practical employer questions
HSE HSG258 — Detailed design, testing and report guidance
COSHH regulation 9 — Legal maintenance and examination requirement

Published price evidence

Tim Prestage Ltd — Publishes approximately £200 plus VAT for one system with up to five extraction points.
Impact Technical Services — Publishes a starting point of £250 for a smaller single-point system.
Spray Direct — Publishes £245 ex VAT per spray-booth fan at the checked date.

System map

What a complete LEV examination follows

A TExT follows the contaminant from capture to discharge and tests whether the complete control chain still performs as intended.

Check against HSE HSG258

01SourceDust, fume, mist or vapour generated by the work
02HoodCapture position, enclosure and control at the source
03DuctCondition, transport velocity, leakage and test points
04CleanerFilter or collector condition and pressure behaviour
05Fan & dischargeAir mover, exhaust route and any recirculation risk

Evidence a competent appointment should leave visible

Physical condition
Airflow and pressure measurements
Benchmark comparison
Control judgement and actions