Overview
ISO 16358-3:2013 is an international standard developed by ISO that specifies testing and calculation methods for determining the annual performance factor (APF) of air-cooled air conditioners and air-to-air heat pumps. This part of the ISO 16358 series focuses on the combined evaluation of both cooling and heating performance over an entire year. It builds on and complements ISO 16358-1 and ISO 16358-2, which separately address cooling and heating seasonal performance factors.
The standard applies exclusively to equipment covered by related ISO standards ISO 5151, ISO 13253, and ISO 15042. It excludes water-source heat pumps, water-cooled systems, portable units with condenser exhaust ducts, and absorption refrigeration cycle equipment. ISO 16358-3:2013 is intended primarily for certification, product comparison, and labeling purposes under mandatory test conditions.
Key Topics
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Annual Performance Factor (APF): A key metric that quantifies the ratio of total heat removed or added to indoor air for cooling and heating operations to the total energy consumed during a year of active mode operation.
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Total Annual Performance Factor (TAPF): An extended performance ratio that includes energy consumption during inactive and disconnected modes in addition to active modes for reverse cycle units.
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Test Conditions and Procedures: Defines standardized test settings for measuring energy consumption and heat load, including specific indoor and outdoor temperature conditions to ensure consistent and comparable results.
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Calculation Methods: Details the formulas and procedures to compute APF and TAPF, linking to the calculations of cooling seasonal total load, heating seasonal total load, and their respective energy consumptions.
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Inactive Mode Power Consumption: Specifies measurement and weighting of power consumption in inactive mode based on temperature-dependent tests, critical for accurate TAPF calculation.
Applications
ISO 16358-3:2013 supports a variety of practical uses:
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Performance Certification: Enables manufacturers, regulators, and certification bodies to assess and certify annual energy efficiency for air-cooled air conditioners and heat pumps.
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Product Labeling and Comparison: Provides a standardized basis for energy efficiency labels, facilitating consumer choice and market transparency.
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Energy Efficiency Regulations: Assists policymakers in implementing regulations based on consistent seasonal and annual performance metrics.
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Design and Development: Guides HVAC engineers and product developers to evaluate combined seasonal performance improving energy-saving designs.
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Market Benchmarking: Helps industry stakeholders benchmark product performance under standardized test conditions.
Related Standards
ISO 16358-3:2013 is part of a series and is closely linked to the following key standards:
- ISO 16358-1: Defines testing and calculation methods for the cooling seasonal performance factor (CSPF).
- ISO 16358-2: Covers the heating seasonal performance factor (HSPF) for the same equipment categories.
- ISO 5151: Provides testing and rating procedures for non-ducted air conditioners and heat pumps.
- ISO 13253: Covers ducted air-conditioners and air-to-air heat pumps performance testing.
- ISO 15042: Offers testing and rating guidelines for multiple split-system air conditioners and heat pumps.
Together, these standards form a comprehensive framework for assessing the seasonal and annual energy efficiency of air-cooled air conditioning and heat pump equipment.
Keywords: ISO 16358-3, annual performance factor, APF, total annual performance factor, TAPF, air-cooled air conditioners, air-to-air heat pumps, seasonal performance factor, HVAC efficiency testing, energy consumption, performance certification, ISO air conditioner standards