Overview
ISO 8273:1985 - Doors and doorsets: Standard atmospheres for testing the performance of doors and doorsets placed between different climates - defines standard test atmospheres and procedures to assess how temperature and humidity differences affect doors and doorsets. The standard applies to external and internal elements in ordinary buildings and houses, but explicitly excludes doors in rooms with special atmospheres (for example, freezing-room doors).
This International Standard was prepared by ISO/TC 162 (Doors and windows) and establishes practical hygrothermal test conditions to measure material and functional changes caused by climatic differences on each side of a door or doorset.
Key Topics and Requirements
- Standard atmospheres: Four climate categories are specified to represent typical contrasting conditions a door may face. These atmospheres define target temperature and relative humidity values for each side of a door during testing.
- Preconditioning: Before exposure, doors and doorsets shall normally be preconditioned in an atmosphere of 23 ± 2 °C and 50 ± 5 % RH until temperature and moisture equilibrium is approximately achieved.
- Exposure time: The default standard exposure period is 28 days unless a different duration is specified by performance requirements; tests may end earlier if equilibrium is reached.
- Special sequence: One climate category includes an additional 24-hour exposure at −20 °C at the end of the conditioning period (no humidity requirement for that final step).
- Measured effects: The standard focuses on hygrothermal stability and how it affects performance metrics including:
- air penetration (air tightness),
- sound insulation,
- operating force (ease of operation),
- dimensional changes (shape and size distortion).
Applications and Who Uses It
ISO 8273:1985 is used by:
- Manufacturers and product designers to validate material choices and joint/assembly details against climate-induced deformation or performance loss.
- Independent test laboratories running standardized hygrothermal conditioning and performance tests on doors and doorsets.
- Certification bodies and specifiers who define performance criteria for building products and building envelope components.
- Architects and façade engineers specifying appropriate doorsets for buildings subjected to different interior/exterior climates.
The standard helps ensure reliable performance of doors under real-world temperature and humidity gradients, supporting product quality, compliance testing, and comparison between products.
Related Standards
- ISO 554 - Standard atmospheres for conditioning and/or testing - Specifications (referenced for general conditioning practices).
- Prepared by ISO/TC 162 (Doors and windows) - for context on committee scope and related work.
Keywords: ISO 8273:1985, standard atmospheres, doors and doorsets, hygrothermal stability, preconditioning, exposure time, air penetration, sound insulation, operating force, climate categories.