Overview
EN ISO 13349-2:2022 (ISO 13349-2:2022) specifies standardized categories and vocabulary for fans used for all purposes. Published by CEN and identical to the ISO text, this Part 2 focuses on categorization (whereas ISO 13349-1 covers vocabulary). It is intended to harmonize terminology, designation and classification across manufacturers, consultants and contractors. The document supersedes EN ISO 13349:2010 and is not applicable to electrical safety.
Key topics and technical scope
This standard organizes fan categories and defines the technical parameters and designation practices used industry-wide. Major topics include:
- Symbols and units - standardized symbols and primary SI units for fan parameters (volume flow, fan pressure, power, torque, density, speed, temperature, work per unit mass, thrust).
- Fan categories (Clause 5) - principles for categorizing fans by:
- Suitability for pressure and work per unit mass, including effects of air/gas density and hot-gas designation
- Construction type and casing (casing categorizations, gas-tight and smoke-ventilating fan designations)
- Transmission/drive arrangements (standardized ways to describe drive layouts)
- Inlet and outlet conditions and positioning (direction of rotation, outlet position, component locations)
- Method of fan control and other functional classifications
- Characteristic dimensions and component names - standardized terms and reference dimensions to avoid ambiguity in drawings and specifications.
- Normative references - ties to ISO 5167-1, ISO 5801 (performance testing), ISO 13349-1 (vocabulary) and ISO 13351 (dimensions).
Practical applications and users
EN ISO 13349-2:2022 is practical for anyone involved in design, procurement, testing or specification of air-moving equipment:
- Manufacturers - to label products consistently, prepare datasheets and communicate drive/casing arrangements.
- Consulting engineers and system designers - to specify fans unambiguously in HVAC, industrial ventilation, smoke control and process applications.
- Contractors and installers - to interpret drawings and install fans in the correct orientation and configuration.
- Testing laboratories and certification bodies - to reference standardized terms when reporting performance (in conjunction with ISO 5801).
- Procurement and maintenance teams - to compare and replace equipment using standardized category definitions.
Related standards
- ISO 13349-1 - Fans: Vocabulary (Part 1)
- ISO 5801 - Fans: Performance testing using standardized airways
- ISO 5167-1 - Measurement of fluid flow (relevant measurement methods)
- ISO 13351 - Fans: Dimensions
Using EN ISO 13349-2:2022 improves clarity in fan classification, reduces miscommunication between suppliers and users, and supports international interoperability across fan specifications and technical documentation.