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What is EN ISO 12786:2014?

EN ISO 12786:2014 is a technical standard developed by the European Committee for Standardization (CEN) and the International Organization for Standardization (ISO). It provides guidelines and specifications for the thermal performance and sizing of building heating systems. This standard helps ensure energy efficiency, occupant comfort, and environmental sustainability in buildings.

of EN ISO 12786:2014

EN ISO 12786:2014 establishes a methodology for calculating the heating and cooling loads, as well as the equipment requirements for buildings. It considers various factors such as climate, location, building envelope, internal heat gains, and target indoor temperatures. By taking these factors into account, the standard helps determine the appropriate capacity and design of heating systems to maintain optimal conditions inside buildings.

Benefits of following EN ISO 12786:2014

Complying with EN ISO 12786:2014 brings several benefits to building owners, occupants, and the environment. Firstly, it ensures efficient use of energy by accurately sizing heating systems according to the specific requirements of each building. Properly sized systems lead to reduced energy consumption and lower operating costs.

Secondly, this standard promotes occupant comfort by providing guidelines for maintaining indoor temperature conditions that are conducive to productivity, health, and well-being. It takes into account factors like insulation, solar gains, and ventilation, ensuring comfortable spaces for occupants throughout the year.

Lastly, by optimizing energy use and enhancing occupant comfort, EN ISO 12786:2014 contributes to environmental sustainability. Energy-efficient heating systems reduce greenhouse gas emissions and the overall carbon footprint of buildings, thus supporting global efforts towards mitigating climate change.


EN ISO 12786:2014 is a valuable technical standard that plays a significant role in ensuring the thermal performance and energy efficiency of building heating systems. Its application provides numerous benefits including reduced energy consumption, enhanced occupant comfort, and environmental sustainability. By adhering to this standard, builders and designers can create buildings that are both functional and environmentally friendly.

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