Health and safety requirements
The primary legislation regarding ventilation systems is the Health and Safety at Work Act 1974 and the Management of Health and Safety at Work Regulations 1999. Mechanical ventilation systems including Local Exhaust Ventilation (LEV) are also subject to the Control of Substances Hazardous to Health Regulations.
All LEV assessments are carried out in accordance with COSHH regulations 8, 9 & 10 and also following the guidance of HSG 258 (2017) LEV – Controlling Airborne Contaminants at Work.
Generally, reports are valid for 14 months from the date of the assessment unless specified in HSG 258 Table 18. All reports should be held on record for a minimum of 5 years and be available near the LEV system for which it is written.