This service provides in-situ experimental validation of the thermal performance of façade elements and windows under real-life environmental conditions using the advanced infrastructure of the NTUA “LivingLab”. The LivingLab is a pilot research building specifically designed for testing building envelope components, equipped with modular and removable façade and window systems, and built according to cargotecture standards – utilizing shipping containers in a bioclimatic and sustainable manner.
The facility allows for the direct installation and testing of wall panels and transparent systems (windows, coatings, balcony doors) under highly controlled thermal conditions. The building consists of three thermal zones, each equipped with independent temperature control systems. The south-facing orientation, combined with high-insulation elements and adjustable shading systems, provides a realistic test environment for solar radiation, thermal bridges, and dynamic heating/cooling interactions.
Key thermal performance indicators are measured in accordance with international standards. These include:
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Thermal transmittance (U-value) and thermal resistance (R-value) using ISO 9869 and ASTM C1155 methods, requiring accurate surface and ambient temperature monitoring alongside heat flux sensors.
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Solar Heat Gain Coefficient (g-value) for windows, calculated based on direct solar irradiance and transmitted radiation data using calibrated radiometers.
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Visible Transmittance (Tvis) of glazing systems, measured with lux sensors to evaluate daylight performance.
The LivingLab setup enables long-duration testing (typically ≥6 months), ideal for capturing seasonal effects, transient behavior, and realistic performance under operational conditions. Both opaque and transparent systems can be swapped in and out with minimal structural disruption.
This service is suitable for TRL5 validation activities, where technologies must prove functionality in a relevant environment. It supports developers of innovative façade solutions, energy-efficient glazing, passive coatings, or smart materials in demonstrating market-readiness through robust performance data.
