Special Room : (Special Performance-Based Definitions) A separate enclosed area that is part of or attached to another building and is used exclusively for a hydrogen system
NFPA 50A Standard for Gaseous Hydrogen Systems at Consumer Sites, 1999 ed. http://www.hydrogenandfuelcellsafety.info/resource s/workshops/04apr/csRivkin_apr04.pdf, (Std: Site Gaseous Hydrogen Sys at Consumer Sites - Amer) {206 NFC}