ISO TR 16219-2024 PDF

Full title and description

ISO/TR 16219:2024 — Fans — System effects and system effect factors. This technical report gives guidance on the likely degradation of fan air performance measured in standardized test ducts (ISO 5801) when the same fans are installed in real system ducts and site conditions; it presents typical system-effect factors and trends for several generic fan types and fittings to aid designers, test laboratories and manufacturers in assessing and mitigating system effects.

Abstract

The report describes experimental and published data showing how fan performance measured under standardized test conditions can differ from in-situ performance because of inlet and outlet disturbances and duct geometry. It covers axial and centrifugal fans and a range of common fittings, summarizes measured system-effect factors, and provides guidance and example trends (not absolute corrections) intended as design and assessment aids. The underlying datasets include long-term experimental programmes and research supported by organizations such as NEL, ASHRAE and AMCA.

General information

• Status: Published (Technical Report).
• Publication date: 15 August 2024 (ISO publication, edition 2, 2024).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 23.120 — Ventilators, fans and air-conditioning equipment.
• Edition / version: Edition 2 (2024). Replaces/succeeds the previous ISO/TR 16219:2020 publication.
• Number of pages: 80 pages (typical published length for the ISO technical report).

Scope

This technical report provides guidance on quantifying and understanding system effects that cause deviations between fan performance measured in standardized test ducts (ISO 5801) and actual site performance. It examines a range of fan types (axial and centrifugal) and typical disturbing components/fittings, and offers system-effect factor data and trends to support estimation of in-situ performance, system design decisions and planning of site tests. The report is advisory (guidance) rather than prescriptive and emphasizes that system effects depend strongly on exact geometry and installation.

Key topics and requirements

• Definition and explanation of "system effects" and system-effect factors for fans (how inlet/outlet disturbances and fittings alter tested performance).
• Summarised experimental results and trends for axial and centrifugal fans under representative disturbed conditions.
• Typical system-effect factors for common fittings and installation configurations (guidance values, not absolute corrections).
• Discussion of limitations: dependence on exact geometry, need for site-specific assessment or testing where accuracy is required.
• References to standardized test method ISO 5801 and to source datasets (NEL, ASHRAE-supported projects, AMCA laboratory results) used to derive guidance.

Typical use and users

Primary users include HVAC and ventilation system designers, fan manufacturers, test laboratories, commissioning and installation engineers, and researchers. Typical uses are: estimating likely in-situ fan performance when selecting fans, interpreting laboratory test data in the context of field installations, planning site tests and mitigations (inlet/outlet conditioning), and informing product literature and installation guidance.

Related standards

ISO/TR 16219:2024 is directly related to ISO 5801 (Fans — Airflow performance in standardised test ducts) and should be used in conjunction with that test-method standard when comparing laboratory and field performance. It is also contextually linked to relevant AMCA, ASHRAE and national testing documents and guidance on fan installation and testing.

Keywords

fans; system effects; system-effect factors; axial fans; centrifugal fans; ISO 5801; fan performance; inlet disturbance; outlet disturbance; installation effects.

FAQ

Q: What is this standard?

A: ISO/TR 16219:2024 is a technical report (guidance document) titled "Fans — System effects and system effect factors" that summarises data and trends for the degradation of fan performance caused by real installation conditions compared with standard test-duct results.

Q: What does it cover?

A: It covers typical system-effect phenomena, presents measured trends and guidance values for axial and centrifugal fans and for common fittings, and discusses limitations and appropriate use of the guidance; it does not provide prescriptive correction formulas that are valid for every installation.

Q: Who typically uses it?

A: HVAC designers, fan manufacturers, testing laboratories, commissioning engineers and researchers who need to interpret laboratory fan test results in the context of field installations or to plan mitigations and site testing.

Q: Is it current or superseded?

A: This is the current edition published in 2024 (Edition 2). It supersedes the earlier ISO/TR 16219:2020 technical report. Users should refer to the 2024 edition for the latest guidance.

Q: Is it part of a series?

A: ISO/TR 16219 is a single technical report addressing system effects for fans; it is complementary to the family of ISO standards and technical reports on fan testing and HVAC equipment (notably ISO 5801 for test methods). It sits within the work of ISO/TC 117 (Fans).

Q: What are the key keywords?

A: Fans, system effects, system-effect factors, fan performance, installation effects, ISO 5801, axial fans, centrifugal fans.