ISO 21927-3:2021 pdf download.Smoke and heat control systems — Part 3: Specifications for powered smoke and heat exhaust ventilators
This document specifies the product characteristics of powered smoke and heat control ventilators (fans) intended to be used as part of a powered smoke and heat control ventilation system in construction works.
It provides test and assessment methods of the characteristics and the conformance criteria of the test assessment results.
This document applies to the following:
a) fans for smoke and heat control ventilation;
b) impulse/jet fans for smoke and heat control ventilation.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 281, Rolling bearings — Dynamic load ratings and rating life
ISO 834-1, Fire-resistance tests — Elements of building construction — Part 1: General requirements
ISO 5167 (all parts), Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full
ISO 5801, Fans — Performance testing using standardized airways
IEC 60034-1, Rotating electrical machines — Part 1: Rating and performance
IEC 60034-2-1, Rotating electrical machines — Part 2-1: Standard methods for determining losses and efficiency from tests (excluding machines for traction vehicles)
IEC 60085, Electrical insulation — Thermal evaluation and designation
IEC 60584-1, Thermocouples — Part 1: EMF specifications and tolerances
EN 1363-1, Fire resistance tests — Part 1: General Requirements
EN 13501-4, Fire classification of construction products and building elements — Part 4: Classification using data from fire resistance tests on components of smoke control systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
3.1 powered smoke and heat control ventilator
PSHC ventilator
smoke-ventilating fan that is suitable for handling smoke and hot gases for a specified time/
temperature profile
3.2 smoke reservoir
region within a building, limited or bordered by smoke curtains or structural elements, which retains a
thermally buoyant smoke layer in the event of a fire
3.3 powered roof ventilator
fan designed for mounting on a roof and with exterior weather protection
3.4 smoke reservoir ventilator
ventilator suitable for operation fully immersed in a smoke reservoir (3.2)
3.5 product family
physically similar fans using the same form of construction and materials throughout, with the same methods of impeller construction, motor mounting and construction, and electrical connection in which the following may vary across the range:
— overall dimensions of the fans; and/or
— the impeller diameter and width, hub size, blade length and number of blades of the impeller; and/or
— the motor details, as per 3.7
3.6 impulse/jet fans for smoke and heat control ventilation
fan used for producing a jet of air in a space and unconnected to any ducting
Note 1 to entry: The air jet may be used, for example, for adding momentum to the air within a duct, a tunnel or other space, or for intensifying the heat transfer in a determined zone.
3.7 motor rating
maximum power that a motor delivers continuously without exceeding the allowable temperature rise
4 Requirements
4.1 Response delay (response time)
4.1.1 Opening under wind load within a given time
If the fan is designed to be installed at the atmospheric termination of a smoke control system (e.g. powered roof ventilator) and is fitted with a fan shutter flaps or louvers which project above the wind deflectors (cowl or wind shield), the shutter, flaps or louvers shall open in less than 30 s when tested in accordance with 5.2.1.
4.1.2 Opening under snow load within a given time
If the fan is designed to be installed at the atmospheric termination of a smoke control system (e.g. powered roof ventilator) and is fitted with a fan shutter flaps or louvers which project above the wind deflectors (cowl or wind shield), the shutter, flaps or louvers shall open in less than 30 s when tested in accordance with 5.2.2.ISO 21927-3 pdf download.ISO 21927-3 pdf download
