Abstract
Residential thermal conditions are important because people spend the majority of their time in the home environment. Indoor temperature and relative humidity (RH) were measured continuously over 1 year in 14 residences in Seoul, Korea. The relationship between residential indoor and outdoor conditions were determined by four meteorological parameters—temperature, apparent temperature (AT), RH, and absolute humidity (AH). Outdoor and indoor temperature, and AT and AH were closely correlated, but RH was not. While indoor temperatures, AT, and AH were significantly higher than the corresponding outdoor levels, indoor RH was significantly lower than outdoor RH. Regression models between indoor and outdoor temperature detected a heating threshold at 15.0°C for outdoor daily temperature, but not cooling point. Cooling point of hourly temperature was observed only in 2 PM at apartment with air conditioning. Indoor temperatures in apartments were lower in summer and higher in winter than those in detached houses. However, indoor RHs in apartments were lower than in detached houses.
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