Abstract
This paper reviewed the validity of IRT from the comparison·analysis of U-value and HFM results of apartments in Korea, which have been calculated using IRT, and presents the evaluation solution for thermal insulation performance that can consider the main environmental factors. Side walls of 3 apartments that were constructed in 10-year intervals from one another, were selected as subjects of measurement. The subjects’ environmental impact of surroundings and measurement device’s errors were considered for analysis. In result, it is evaluated that there is validity of ±20% error between IRT and HFM measurement methods when reflected temperature is at ±1.0SUPo/SUPC range of air temperature and emissivity is at ±0.2 range.
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