Accurate thermal conductivity testing for urban outdoor furniture materials requires strict environmental humidity control, typically between 40-60% relative humidity (RH). This range prevents moisture absorption that would distort thermal property measurements. High humidity levels can cause porous materials like wood or composite polymers to absorb moisture, increasing their apparent thermal conductivity. Conversely, extremely dry conditions may cause material shrinkage and alter thermal properties. Standard testing protocols including ASTM C518 and ISO 8301 specify controlled laboratory conditions with 50±5% RH for consistent results. Proper humidity control ensures reliable data for designing furniture that performs optimally in various outdoor environments, providing appropriate thermal comfort and safety for public spaces.
What are the environmental humidity requirements for the material thermal conductivity test of urban outdoor furniture?
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