Provisions appropriate to the energy storage technology shall be made for sufficient diffusion and ventilation of any possible gases from the storage device
, if present, to prevent the accumulation of an explosive mixture. A pre-engineered or self-contained ESS
shall be permitted to provide ventilation in accordance with the manufacturer's recommendations and listing for the system.
Informational Note No. 1: See NFPA 1-2015, Fire Code, Chapter 52, for ventilation considerations for specific battery chemistries.
Informational Note No. 2: Some storage technologies do not require ventilation.
Informational Note No. 3: A source for design of ventilation of battery systems is IEEE 1635-2012/ASHRAE Guideline 21-2012 Guide for the Ventilation and Thermal Management of Batteries for Stationary Applications, and the UBC.
Informational Note No. 4: Fire protection considerations are addressed in NFPA 1-2015, Fire Code.