IEC 63159-2-1:2021

Overview

IEC 63159-2-1:2021 is an international standard published by the International Electrotechnical Commission (IEC) that specifies standardized methods for measuring the performance of household electric instantaneous water heaters, specifically those designed as multifunctional appliances with an electric rated power exceeding 2 kW. This document is a crucial reference for manufacturers, testing organizations, and regulatory bodies seeking to ensure consistent, reliable, and comparable performance assessment of electric instantaneous water heaters that serve multiple domestic purposes, such as kitchens, bathrooms, and showers.

IEC 63159-2-1:2021 is intended to be used in conjunction with IEC 63159-1:2021, which establishes general aspects and definitions for household electric instantaneous water heaters.

Key Topics

Scope and Applicability

• Applies to multifunctional electric instantaneous water heaters used in household environments, with a focus on models that supply more than one outlet (e.g., kitchen sinks, showers, hand-washing basins, bathtubs).
• Targets appliances with an electric rated power greater than 2 kW, commonly used in modern residential and similar installation contexts.

Performance Assessment

• Defines a range of performance tests for determining the efficiency, flow rate, response time, and behavior under varying operational conditions.
• Specifies the test setup, including standard water inlet temperature ranges, flow and pressure requirements, and measurement techniques.
• Outlines detailed conditions for setting temperature and power selectors during testing to ensure comparability.

Key Definitions and Metrics

• Introduces terms such as setpoint value, pressure drop, response time, flow rate, and heating-up duration-all critical for proper evaluation and reporting.
• Establishes standardized methods for measuring energy efficiency and consumption, laying out clear formulas and classification factors (CF) to distinguish between types of water heater technology (such as hydraulic vs. electronic control).
• Classifies heaters into H class (hydraulic) and E class (electronic/smart), based on comparative energy performance.

Applications

IEC 63159-2-1:2021 is essential for a variety of stakeholders in the electric water heating sector:

• Manufacturers: Ensures that product claims on energy performance and water flow meet globally recognized standards, aiding in product development and international market entry.
• Testing Laboratories and Certification Bodies: Provides a rigorous, repeatable methodology for certifying and comparing electric instantaneous water heaters, leveling the playing field and supporting regulatory compliance.
• Regulatory Agencies: Supports the creation and enforcement of national energy labeling and ecodesign requirements for household water heaters.
• Installers and Engineers: Assists in selecting appropriate appliances based on credible performance data for multi-outlet, high-demand domestic environments.
• Consumers: Promotes confidence in the appliance's ability to deliver efficient hot water to multiple fixtures simultaneously while ensuring energy savings.

Related Standards

The following international standards are closely related to IEC 63159-2-1:2021 and are often used in conjunction with it:

• IEC 63159-1:2021: General aspects for household electric instantaneous water heaters; forms the foundational base for all subsequent parts, including 2-1.
• IEC 60335 series: Household and similar electrical appliances - Safety; complements performance standards with safety requirements.
• IEC 60730 series: Automatic electrical controls for household and similar use; relevant for electronic control aspects within water heaters.

Practical Value

Adhering to IEC 63159-2-1:2021 ensures that household multifunctional electric instantaneous water heaters are tested in a manner that is consistent, reproducible, and recognized internationally. This supports energy efficiency initiatives, consumer protection, and global trade of compliant water heating appliances. By specifying clear testing conditions, measurement procedures, and classification criteria, this standard empowers all actors in the household appliance sector to deliver, certify, and utilize products that meet modern expectations for performance, safety, and sustainability.