Open Bag Filter Units – Assessment, Performance and Control
Good airflow does not necessarily mean effective dust control. Is your woodworking extraction system adequately protecting the workplace?
The LEV Standards Coalition has published a new technical factsheet, Open Bag Filter Units – Assessment, Performance and Control, providing practical guidance for LEV practitioners, engineers and dutyholders responsible for woodworking dust extraction systems.
Open bag, sock and multi-sock dust collectors are widely used in woodworking environments. However, even where extraction appears effective at the machine, fine wood dust may escape through filter media, seams, seals or connections, potentially returning hazardous airborne particles into the workplace.
This factsheet highlights the importance of assessing the complete LEV system, not simply measuring airflow. It covers filter suitability, dust containment, inspection and testing, maintenance, collector positioning and the wider requirements of COSHH and DSEAR.
It also provides practical inspection guidance, indicators of poor control and a structured decision-making pathway to help practitioners identify potential shortcomings and recommend appropriate improvements.
Industry Representation and Engagement with the HSE
The LEV Standards Coalition, alongside industry representatives, has formally raised concerns with the Health and Safety Executive (HSE) regarding open bag and sock filter dust collection units used within the woodworking industry.
A joint industry submission was made to the HSE in September 2026, requesting a review and clarification of existing guidance and expectations surrounding the suitability, performance and safe use of these systems.
As the HSE’s response and any subsequent review are pending, the information and recommendations contained within this factsheet may be subject to change. The factsheet reflects current guidance and industry understanding at the time of publication. Any future clarification or updated guidance from the HSE will be considered and, where necessary, incorporated into revised versions.
The key message remains clear: Good airflow does not guarantee good filtration. Effective LEV must capture, transport and contain hazardous dust.
Read or download the factsheet and accompanying industry submission to the HSE to understand the concerns being raised, the current guidance and the importance of effective dust control in woodworking environments.
The fact sheet: LEVSC_Open Bag Filter Units_Engineering Control Factsheet_30092026_v1.1
Copy of the lobbying Document: Open bag filters_Industry Submission to the HSE_22092026_v1.3_Final Draft
