Historical
ISO 21927-2:2006
Smoke and heat control systems - Part 2: Specification for natural smoke and heat exhaust ventilators
ISO 21927-2:2006 specifies requirements and gives test methods for natural smoke- and heat-exhaust ventilators that are intended to be installed in a roof and/or wall as a component of a natural smoke- and heat-exhaust system.
International Organization for Standardization [iso]