Research Foundation webinar recording on “Combustible Gas Dispersion and Detector Location Analysis in Residential Occupancies” is now available
There have been a handful of fuel gas explosions in the last five years including incidents that occurred in three rowhouses in northwest Baltimore in Aug 2020, in the Merrimack region of Massachusetts in 2018, and in Silver Spring Maryland in 2016. Listed fuel gas detectors and alarms exist, but there is no installation standard. Firm requirements are needed for installation of fuel gas detectors in residences and other occupancies. A new NFPA standard, NFPA 715 Standard for the Installation of Fuel Gases Detection and Warning Equipment is currently under development and will cover the selection, design, application, installation, location, performance, inspection, testing, and maintenance of fuel gas detection and warning equipment in buildings and structures.
The Fire Protection Research Foundation facilitated a research project on combustible gas dispersion and detector location analysis in residential occupancies. The project was led by a research team at Gexcon US, and the deliverables from the study were presented in the Research Foundation’s most recent webinar on March 10, 2021. The research included a literature review of the existing guidance for combustible gas detector location and installation in residential occupancies, and computational fluid dynamics (CFD) simulations to clarify and strengthen the technical basis for combustible gas detector installation criteria in residential occupancies. CFD simulations were conducted to quantitatively evaluate gas detector performance as a function of placement in residential occupancies. Natural gas and liquefied petroleum gas releases were simulated in different residential structures, and gas concentrations are tracked at numerous potential detector locations within these structures to evaluate which locations are most effective for reliable and early detection.