TS EN 814-1

TS EN 814-1 is a terminology standard for air conditioners and heat pumps with electrically driven compressors when they are used in cooling mode. It establishes the terms, definitions, and designations used for rating and performance of air-cooled and water-cooled air conditioners, as well as air/air and water/air heat pumps.

The document is concerned with the language of performance assessment rather than with prescribing how the equipment is built. In technical practice, clear terminology is essential because cooling capacity, operating conditions, efficiency-related concepts, and unit characteristics must be understood consistently across manufacturers, laboratories, and technical documentation.

Why the cooling-mode vocabulary matters

In general engineering terms, a compressor-driven refrigeration cycle moves heat by circulating a refrigerant through compression and heat exchange processes. Whether the unit is air-cooled or water-cooled affects how rejected heat is managed, while reversible heat pumps can serve both heating and cooling applications. This standard focuses on the cooling-side terminology for those systems.

As a vocabulary standard, it supports consistent rating language, comparison of stated performance, and clearer specification writing. It does not, by itself, define the whole test programme; instead, it provides the shared terminology that underpins reliable communication about cooling performance.

• Focuses on terms and definitions for cooling-mode applications.
• Covers air-cooled and water-cooled air conditioners.
• Includes air/air and water/air heat pumps.
• Supports rating and performance descriptions with common terminology.
• Helps align technical communication across documents and stakeholders.