Overview
ISO 11855-1:2021/Amd 1:2023 is an important amendment to the international standard governing building environment design for embedded radiant heating and cooling systems. This part of the ISO 11855 series focuses on definitions, symbols, and comfort criteria essential for correct specification, design, and assessment of embedded radiant systems. The amendment introduces a new classification of radiant systems into five distinct types based on their construction and thermal output calculation methods, enhancing clarity and enabling better design decisions.
Developed by ISO Technical Committee ISO/TC 205 in cooperation with CEN/TC 228 under the Vienna Agreement, this document is critical for professionals involved in sustainable building heating and cooling technologies. It supports the integration of thermo active building systems (TABS) and other radiant technologies by defining acoustical and thermal comfort parameters consistent with current engineering practices.
Key Topics
Applications
The ISO 11855-1:2021/Amd 1:2023 standard applies broadly to embedded radiant heating and cooling systems used in various types of buildings, including but not limited to:
- Residential and commercial buildings for floor, wall, and ceiling heating/cooling
- Office buildings incorporating thermo active building systems (TABS) for improved energy efficiency
- Sports halls requiring specialized systems with air gaps and thermal reflection layers for comfort
- Sustainable building design, enabling low-energy, comfortable indoor environments with radiant heating and cooling
By following these standardized definitions and criteria, architects, engineers, and HVAC professionals ensure design consistency, occupant comfort, and optimized system performance. The amendment also facilitates development of new products and technologies aligned with global best practices.
Related Standards
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ISO 11855-2: Building environment design - Embedded radiant heating and cooling systems - Part 2: Determination of the design heating and cooling capacity
Focuses on methods for calculating the design thermal output of radiant systems, which directly complements Part 1 definitions and classification.
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Other parts of the ISO 11855 series provide guidance on installation, testing, operation, and maintenance of embedded radiant systems, ensuring comprehensive coverage of the design lifecycle.
Keywords: ISO 11855-1 Amendment 1, embedded radiant heating systems, cooling systems, thermo active building systems, radiant system classification, thermal output calculation, building environment design, comfort criteria, acoustic comfort, radiant floor heating, HVAC standards.
Open preview (PDF)Building environment design — Embedded radiant heating and cooling systems — Part 1: Definitions, symbols, and comfort criteria — Amendment 1