ISO 5222-1:2023 PDF

Heat recovery ventilators and energy recovery ventilators — Testing and calculating methods for seasonal performance factor — Part 1: Sensible heating recovery seasonal performance factors of heat recovery ventilators (HRV)

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Title (English):

ISO 5222-1:2023

Document status:: Withdrawn
Format:: Electronic (PDF)
Number of pages:: 22
Publication date:: August 29, 2023
Edition:: ISO IS 5222 edition 1 version 1
ICS:: 23.120

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Description (English):

This document specifies the testing and calculating methods for sensible heating recovery seasonal performance factor of heat recovery ventilators (HRV) covered by ISO 16494-1. This document also specifies the test conditions and the corresponding test procedures for determining the sensible heating recovery seasonal performance factor of HRV and is intended for use only in marking, comparison, and certification purposes. For the purposes of this document, the rating conditions are those specified in ISO 16494-1 and in Annex B. The procedures of this document may be used for other temperature conditions.

Technical details

Technical committee: ISO/TC 86/SC 6 - Testing and rating of air-conditioners and heat pumps
SKU: ISO 5222-1:2023

Abstract

Overview

ISO 5222-1:2023 - "Heat recovery ventilators and energy recovery ventilators - Testing and calculating methods for seasonal performance factor - Part 1" specifies test and calculation methods for the sensible heating recovery seasonal performance factor (F_sh) of heat recovery ventilators (HRV) covered by ISO 16494-1. The standard defines test conditions, procedures and calculation steps used for marking, comparison and certification of HRV sensible heating performance, using the rating conditions in ISO 16494-1 and the default outdoor temperature bins in Annex B.

Key topics and technical requirements

Scope and relationship with ISO 16494-1: Applies to HRV sensible heating recovery metrics defined in ISO 16494-1:2022.
Standard test conditions (T5/T6/T7): Specifies three reference test conditions (e.g., T5 = 2 °C outdoor / 21 °C indoor, T6 = 5 °C / 20 °C, T7 = 7 °C / 20 °C) for evaluating heating-mode performance and selecting the most representative condition for a given region.
Test methods: Procedures for measuring gross sensible heating effectiveness (ε_sh), airflow, static pressure and system power under standard conditions and application climate bins.
Bypass ventilation and energy-saving stages: Defines how to determine the bypass outdoor temperature (T_b), verify bypass function, and measure power input when bypass or staged fan control is used.
Calculations: Step-by-step methods for:
- Gross sensible heating effectiveness,
- Sensible heating coefficient of energy for ducted and unducted ventilators,
- Seasonal sensible heating capacity (E_sh) and seasonal power input (P_in,E),
- Final seasonal performance factor F_sh (ratio of seasonal recovered sensible heat plus moving-air power value to total HRV electricity input).
Additional requirements: Frost temperature determination, outdoor temperature bin distributions (Annex B), test reporting template and normative annexes for specific calculations (Annexes C, D, E, F).

Practical applications

Product labeling, certification and marketing of HRV sensible heating performance.
Independent testing laboratories use the test procedures and reporting templates to verify manufacturer claims.
Manufacturers and R&D teams apply the standard to design and optimize HRV controls (bypass, fan staging) for improved seasonal performance.
HVAC specifiers, energy auditors and building designers use F_sh values for system selection, energy modelling and comparing HRV options for cold-climate heating efficiency.
Regulators and certification bodies adopt the method for standardized performance comparisons and compliance programs.

Related standards

ISO 16494-1:2022 - Method of test for performance; provides metrics and definitions used by ISO 5222-1.
Refer to the broader ISO 5222 series for additional parts covering other seasonal performance aspects.

Keywords: ISO 5222-1:2023, heat recovery ventilators, HRV, seasonal performance factor, sensible heating recovery, testing methods, ISO 16494-1, bypass ventilation, gross effectiveness, temperature bins.

Related standards

Standards mentioned in the description

Abstract

Overview

Key topics and technical requirements

Scope and relationship with ISO 16494-1: Applies to HRV sensible heating recovery metrics defined in ISO 16494-1:2022.
Standard test conditions (T5/T6/T7): Specifies three reference test conditions (e.g., T5 = 2 °C outdoor / 21 °C indoor, T6 = 5 °C / 20 °C, T7 = 7 °C / 20 °C) for evaluating heating-mode performance and selecting the most representative condition for a given region.
Test methods: Procedures for measuring gross sensible heating effectiveness (ε_sh), airflow, static pressure and system power under standard conditions and application climate bins.
Bypass ventilation and energy-saving stages: Defines how to determine the bypass outdoor temperature (T_b), verify bypass function, and measure power input when bypass or staged fan control is used.
Calculations: Step-by-step methods for:
- Gross sensible heating effectiveness,
- Sensible heating coefficient of energy for ducted and unducted ventilators,
- Seasonal sensible heating capacity (E_sh) and seasonal power input (P_in,E),
- Final seasonal performance factor F_sh (ratio of seasonal recovered sensible heat plus moving-air power value to total HRV electricity input).
Additional requirements: Frost temperature determination, outdoor temperature bin distributions (Annex B), test reporting template and normative annexes for specific calculations (Annexes C, D, E, F).

Practical applications

Product labeling, certification and marketing of HRV sensible heating performance.
Independent testing laboratories use the test procedures and reporting templates to verify manufacturer claims.
Manufacturers and R&D teams apply the standard to design and optimize HRV controls (bypass, fan staging) for improved seasonal performance.
HVAC specifiers, energy auditors and building designers use F_sh values for system selection, energy modelling and comparing HRV options for cold-climate heating efficiency.
Regulators and certification bodies adopt the method for standardized performance comparisons and compliance programs.

Related standards

ISO 16494-1:2022 - Method of test for performance; provides metrics and definitions used by ISO 5222-1.
Refer to the broader ISO 5222 series for additional parts covering other seasonal performance aspects.

ISO 5222-1:2023 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Practical applications

Related standards

Related standards

Abstract

Overview

Key topics and technical requirements

Practical applications

Related standards

Related standards

Heat recovery ventilators and energy recovery ventilators — Method of test for performance — Part 1: Developm…

Heat recovery ventilators and energy recovery ventilators. Method of test for performance. Development of met…

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