ISO 13348-2025 PDF

Full title and description

St ISO 13348-2025 — Fans — Tolerances, methods of conversion and technical data presentation. An international standard that specifies performance tolerances, methods for converting fan performance data between reference conditions, and a standardized format for presenting technical data for fans used in industrial and commercial applications.

Abstract

This third-edition standard defines the tolerances that apply to fan performance data, the procedures for converting performance values between different reference conditions, and requirements for the presentation of technical data so that fan performance can be compared and contracted upon reliably. It applies to most industrial and commercial fans but excludes fans intended solely for low-volume household air circulation. The document also references installation categories (A–E) that significantly affect measured performance and includes efficiency-scaling guidance for centrifugal and axial fans within defined specific-speed ranges.

General information

• Status: Published (active)
• Publication date: 6 June 2025
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 23.120 (Ventilators, fans and air-conditioners)
• Edition / version: Edition 3 (2025)
• Number of pages: 77

Scope

The standard applies to industrial and commercial fans of all types, specifying acceptable tolerances on performance parameters, how to convert data between differing reference conditions (air density, temperature, pressure, etc.), and how technical data should be presented to end users. It excludes fans designed solely for low-volume household applications (for example, typical ceiling, table or small extractor fans). The standard incorporates the five installation categories (A–E) affecting performance and sets practical upper guidance for fan work per unit mass, with higher values requiring agreement between supplier and user.

Key topics and requirements

• Defined performance tolerances for fan parameters (pressure, flow, power, efficiency) used in contractual and technical data.
• Methods for converting performance data between reference conditions (density, temperature, pressure) to enable fair comparison of fan data.
• Standardized presentation format for technical data and test results to improve clarity and comparability.
• Inclusion of five installation categories (A–E) with explanations of how installation affects performance.
• Efficiency-scaling procedures for centrifugal and axial fans within specified specific-speed ranges.
• Guidance on limits for fan work per unit mass (typical upper limit ~25 kJ/kg) and requirement for supplier–user agreement for higher values.
• Exclusions and cross-references (e.g., jet fans handled under ISO 13350).

Typical use and users

Used by fan manufacturers, HVAC and system designers, performance test laboratories, procurement/specification engineers, and contract managers. The standard is referenced when preparing product data sheets, specifying fan performance in contracts, comparing fan options, and when converting published performance to common reference conditions for system design and selection.

Related standards

Standards and documents commonly used alongside ISO 13348: ISO 5801 (installation categories and performance testing conventions for industrial fans), ISO 13350 (jet fans), and earlier edition ISO 13348:2007 (withdrawn and superseded by the 2025 edition). Relevant ISO/TC 117 guidance and test-method standards for fan performance are also typically consulted.

Keywords

fans, industrial fans, performance tolerances, data conversion, technical data presentation, installation categories, efficiency scaling, fan work per unit mass, fan testing, ISO 13348:2025

FAQ

Q: What is this standard?

A: ISO 13348:2025 is an international standard that sets performance tolerances, conversion methods, and rules for presenting technical data for industrial and commercial fans.

Q: What does it cover?

A: It covers tolerances on fan performance (flow, pressure, power, efficiency), methods to convert performance data between reference conditions, the recommended format for technical data presentation, and how installation categories (A–E) influence measured performance. It excludes fans intended solely for low-volume household use.

Q: Who typically uses it?

A: Fan manufacturers, HVAC and system designers, test laboratories, specification writers, and procurement or contract engineers use this standard to ensure consistent performance data and fair product comparisons.

Q: Is it current or superseded?

A: The 2025 third edition is the current published edition (published 6 June 2025), and it supersedes the 2007 edition.

Q: Is it part of a series?

A: It is part of the body of ISO standards on fans and ventilation under ISO/TC 117; related standards include ISO 5801 (installation and testing conventions) and ISO 13350 (jet fans).

Q: What are the key keywords?

A: Fans, performance tolerances, technical data presentation, conversion methods, installation categories, efficiency scaling, ISO 13348:2025.