ISO 19967-2:2024

Overview

ISO 19967-2:2024 - "Air to water heat pumps - Testing and rating for performance - Part 2: Space heating and/or space cooling" (ISO, 2024) specifies standardized test conditions and procedures to determine the performance of factory-made air-to-water heat pumps with electrically driven compressors (with or without supplementary heaters). The standard is intended to rate performance for space heating and/or space cooling of packaged units and excludes large chillers, large liquid chilling packages, and equipment not intended for human comfort. It does not treat simultaneous operation where hot water supply and space heating/cooling interact.

Key topics and technical requirements

• Scope & applicability: Packaged air-to-water heat pumps for space heating and/or space cooling; electrically driven compressors only.
• Installation requirements: Test apparatus, uncertainties of measurement, test room arrangements for airside and remote condensers, and specific installation rules for multi-part units.
• Setting and test conditions: Prescribed operating points and configuration for non-ducted and ducted units, external static pressure settings, and integral pump settings.
• Space heating tests: Procedures for heating capacity measurement, capacity corrections (including pump and fan corrections), effective power input, steady-state and transient tests, and calculation methods.
• Space cooling tests: Procedures for cooling capacity measurement, analogous capacity corrections and effective power input calculations, steady-state conditions and measurement methods.
• Performance metrics defined: Heating capacity, cooling capacity, effective power input, COP (coefficient of performance) and EER (energy efficiency ratio).
• Test reporting: Required data to record and the format of the test report.
• Annexes: Normative annexes include heating capacity test procedures and determination of liquid pump efficiency.

Practical applications and users

• Manufacturers: for product development, internal verification and declaring rated heating/cooling performance.
• Accredited test laboratories: to perform repeatable, comparable performance tests for certification and compliance.
• HVAC designers and specifiers: to compare products using consistent COP/EER and capacity ratings.
• Certification bodies and regulators: for energy labeling, compliance checks and performance verification.
• Energy modelers and consultants: to ensure equipment performance data align with standardized test conditions.

Using ISO 19967-2:2024 enables consistent, comparable ratings of air-to-water heat pumps, helping stakeholders select and certify systems based on reliable heating and cooling performance metrics.

Related standards

• ISO 19967-2 is part of the ISO 19967 series prepared by ISO/TC 86/SC 6 (testing and rating of air‑conditioners and heat pumps). For full implementation and exact procedures, obtain the complete standard from the ISO website.