Combined Air Limited provides a complete range of Local Exhaust Ventilation (LEV) services across the UK. Whether you need statutory testing, routine maintenance, emergency repairs, or spare parts, our BOHS-qualified engineers deliver expert solutions with over 30 years of industry experience.

LEV Statutory Testing (TExT)

HSG258 Compliant Thorough Examination and Test

Every LEV system must be tested at least every 14 months under COSHH regulations, unless the schedule should be shortened for high risk process or stated in COSHH schedule 4. Our BOHS P601, P602, P603, P604 and W201 qualified engineers conduct comprehensive examinations including:

• Complete visual inspection of entire system
• Air velocity and capture zone measurements
• Static pressure testing and analysis
• Filter condition and pressure drop assessment
• Fan and motor performance evaluation
• Detailed technical report with recommendations
• Certificate of Thorough Examination provided

Learn more about our LEV Testing service

LEV Servicing & Preventative Maintenance

Keep Your Systems Compliant Between Tests

Regular servicing ensures your LEV system maintains peak performance to prevent unplanned down time.

Our maintenance services include:

• Filter replacement and cleaning
• Motor and fan bearing inspection and lubrication
• Belt tension checks and replacement
• Ductwork leak detection and sealing
• Hood condition assessment and adjustments
• Performance optimization and airflow balancing
• Scheduled maintenance programs tailored to your operation

We service all types of extraction equipment including electrostatic precipitators, cartridge filters, bag filters, and vent to atmosphere systems.

LEV Remedial Works & Repairs

Expert Diagnosis and Repair

Failed your LEV test? We identify root causes and provide expert remedial solutions:

• Test Failure Rectification - Addressing specific issues identified in testing
• System Performance Restoration - Improving inadequate extraction
• Design Problem Identification - Using P602 knowledge to spot fundamental issues
• Hood and Ductwork Repairs - Damage and wear rectification
• Fan and Motor Replacement - When repair is not economical
• Filter Housing Modifications - Improving access and maintenance

Breakdown Service

Extraction system failure can halt production and create serious health and safety risks. Our emergency service provides:

• Response across the UK
• Expert fault diagnosis
• Emergency repairs to restore operation
• Temporary solutions to maintain production

LEV System Installation

Professional Installation by BOHS Qualified Engineers

We install Local Exhaust Ventilation systems designed by specialist LEV designers and equipment suppliers. Our BOHS qualified engineers bring testing and commissioning expertise to every installation, ensuring your system performs correctly from day one.

Our installation services include:

• Complete LEV system installation from provided designs
• Additional extraction points for new processes or equipment
• Replacement equipment installation
• System relocations
• Ductwork installation, extensions, and modifications
• Pre-installation design review using P602 knowledge
• P604 qualified commissioning with baseline data recording
• Handover documentation and operator guidance

We install with future testing and maintenance requirements in mind, ensuring accessibility and long-term compliance.

Learn more about our LEV Installation service

Parts Supply & Delivery

Spares for All Major Manufacturers

We supply genuine and compatible spare parts for all major extraction equipment brands, with fast delivery across the UK:

• Expert diagnosis service to identify required parts
• Filters, cartridges, and filter bags
• Motors, fans, and impellers
• Belts, bearings, and drive components
• Gaskets, seals, and ducting
• Control panels and electrical components
• Site visit available to diagnose parts requirements
• Installation service available

Electrostatic Precipitator Specialists

Expert Service for ESP Units

We are industry leading experts in the service, repair, and maintenance of electrostatic precipitators including:

• Smog Hog
• Trion
• ACS
• LTA
• Elberon
• IFE
• Many more

ESP-specific services include cell cleaning, ionizer replacement, drive belt tension, drive belt replacement, power supply servicing, and efficiency optimization.

Equipment We Service

We have extensive experience with equipment from all major manufacturers:

Electrostatic Units: Smog Hog, Trion, ACS, LTA, Elberon, IFE

Oil Mist & Coolant Mist: Losma, Filtermist, ACS, OMF, LTA, Reven, Absolent, Cleanmist, MANN + HUMMEL (formerly ScandMist)

Dust Collectors: DCE, Donaldson, UMA, AFF, Filtex, Kemper, Nederman etc. 

Contact Us for LEV Services

LEV Testing: 07540 165061

Servicing & Parts: 07973 921584

Email: Nik@combined-air-limited.co.uk