Overview
ISO 13349-1:2022 is the international standard that establishes the vocabulary and definitions related to fans, covering all fan categories for broad industry applications. This standard provides clear, unified terminology for fans, facilitating better communication among manufacturers, consultants, contractors, and users worldwide. It focuses exclusively on the definition of terms, excluding any electrical safety aspects.
Developed by ISO Technical Committee ISO/TC 117 in collaboration with the European Committee for Standardization (CEN/TC 156), this latest edition supersedes ISO 13349:2010, refining classifications and harmonizing terminology with recognized industry bodies such as Eurovent, AMCA, VDMA, AFNOR, and UNI.
Key Topics
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General Terms and Definitions
ISO 13349-1 defines fundamental concepts such as the notion of a fan, differentiating driven and non-driven fans, and standard air properties (density 1.2 kg/m³).
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Fan Installation Categories
Fans are classified by ducting arrangements including:
- Category A: Free inlet and free outlet with a partition
- Category B: Free inlet, ducted outlet
- Category C: Ducted inlet, free outlet
- Category D: Ducted inlet and outlet
- Category E: Free inlet and free outlet without partition
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Classification by Development and Application
- Custom-designed fans tailored for specific use
- Standardized fans produced in quantity with published performance data
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Function-Based Classification
- Ducted fans for airflow within ducts
- Partition fans transferring air between separated spaces
- Jet fans producing directed air jets in a space
- Circulating fans circulating air without ducts
- Air curtain units generating air curtains to inhibit contamination or airflow
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Classification by Fluid Path Through the Impeller
Determined by the impeller blade angles (α):