TS EN 14511-1

TS EN 14511-1 is a terminology standard for air conditioners, liquid chilling packages and heat pumps with electrically driven compressors. It sets out the terms and definitions used when these products are assessed for space heating and/or cooling, and when process chillers are considered in performance and rating discussions.

Its main technical value is consistency. In HVAC and refrigeration work, the same machine may be described differently by manufacturers, test engineers and specifiers unless the core vocabulary is shared. This standard brings together the language for heat transfer media such as air, water or brine, and for key concepts such as rating and performance, so that product data and comparisons can be interpreted in a uniform way.

What the vocabulary is organised around

• Electrically driven compressor systems and their common terminology
• Air conditioners and heat pumps used for space heating and/or cooling
• Liquid chilling packages and process chillers in performance discussions
• Heat transfer media including air, water and brine

In general technical terms, an air conditioner primarily conditions indoor air, a heat pump moves heat to provide heating or cooling, and a chiller is used to control the temperature of a liquid circuit for comfort or process needs. This standard addresses the wording used for these categories and their performance assessment context; it does not, from the title and scope alone, establish the full set of design rules or test procedures for each product type.

This listing is Part 1 of the EN 14511 series and is marked withdrawn. It is still useful for understanding the established terminology behind older catalogues, reports and engineering references, but it should be distinguished from current live requirements where those differ.