HSE OIS 5/2008
Advice on gas detection strategies for HVAC duct inlets
This information sheet provides advice for duty holders regarding the detection of flammable gases in HVAC (heating, ventilation and air conditioning) duct inlets. It is based on research work triggered by an incident on an offshore platform where there was a delay in confirmed detection, despite gas being ingested into HVAC inlets. The research reviewed the literature on the subject and included an assessment of flammable gas ingestion and mixing in offshore HVAC ducts. This provides a basis for a set of recommendations for duty holders to include in development of their gas detection strategies. Although this sheet is focused on offshore HVAC ducts, the principles outlined are also likely to be relevant to onshore installations in which gas detection is required for HVAC ducts.
This report and the work it describes were funded by the Health and Safety Executive (HSE). Its contents, including any opinions and/or conclusions expressed, are those of the author(s) alone and do not necessarily reflect HSE policy