Resources

MDHS 14/4 – General Methods for Sampling and Gravimetric Analysis of Respirable, Thoracic and Inhalable Aerosols

The Foundation of Workplace Dust Exposure Monitoring in the UK   LEVCentral Expert Commentary If HSG258 is the UK’s principal guidance on designing and maintaining Local Exhaust Ventilation (LEV), then MDHS 14/4 is the cornerstone of measuring whether those engineering …

HSE WEB09: Biological Agents

Practical Guidance on Managing Workplace Risks from Biological Agents LEVCentral Expert Commentary Biological agents can present significant workplace health risks in laboratories, healthcare, waste management, agriculture, animal care, food production and many other sectors. These agents may include bacteria, viruses, …

HSE MDHS 85/2 – Triglycidyl Isocyanurate (and Coating Powders Containing Triglycidyl Isocyanurate) in Air

LEVCentral Expert Commentary Triglycidyl Isocyanurate (TGIC) is widely used as a curing agent in polyester powder coating formulations. During powder coating operations, airborne dust containing TGIC may be generated during powder application, recovery, transfer, cleaning and maintenance activities. This HSE …

Dust Explosion Protection by Flameless Venting

LEVCentral Expert Commentary Explosion protection remains one of the most specialised aspects of industrial ventilation and dust extraction design. Whilst the primary objective should always be to prevent explosive atmospheres from developing, there are many applications where suitable explosion protection …

Building Bulletin 101 – Ventilation, Thermal Comfort and Indoor Air Quality in Schools

Department for Education Guidance on Healthy Learning Environments   LEVCentral Expert Commentary Building Bulletin 101 (BB101) is the Department for Education’s principal guidance document covering ventilation, thermal comfort and indoor air quality within school buildings. Although it is not an …

Fan Handbook – Selection, Application & Design

One of the Most Comprehensive Engineering References on Industrial Fans   LEVCentral Expert Commentary Every Local Exhaust Ventilation (LEV) system ultimately depends upon one critical component—the fan. It is the fan that creates the pressure difference needed to move contaminated …

SHAPA Dust Testing for DSEAR and ATEX Compliance

LEVCentral Expert Commentary Where combustible dusts are handled, assumptions can be dangerous. Materials that appear harmless in normal operation may possess explosion characteristics that only become apparent when dispersed as a dust cloud. This SHAPA Technical Bulletin provides an excellent …

Basic LEV Maths – Fan Laws

A Simple Introduction to One of the Most Important Mathematical Principles in LEV   LEVCentral Expert Commentary One subject that many new LEV engineers find intimidating is fan laws. Yet they are amongst the simplest—and most useful—mathematical relationships used in …

Fletcher’s Nomogram for LEV Design

The Slide Rule of LEV Engineering Before Computers, Apps and Spreadsheets   LEVCentral Expert Commentary Before spreadsheets, mobile apps and computer-based duct design software became commonplace, LEV engineers relied on a remarkable graphical calculation tool known simply as Fletcher’s Nomogram. …

HSE EIS44 Pneumonia Vaccination for Employees Exposed to Welding and Metal Fume

LEVCentral Expert Commentary Most LEV guidance focuses on preventing workers from inhaling hazardous airborne contaminants. HSE Engineering Information Sheet EIS44 takes a slightly different approach by considering the additional role that pneumococcal vaccination may play for employees who are regularly …