Seasonal and personality trait associations with neutral temperatures in home workspaces

• Home workspace thermal conditions were monitored with personal loggers. • Seasonal neutral temperatures were 28.1 °C in summer and 21.0 °C in winter. • The seasonal neutral temperature gap was higher than in typical lab/office studies. • Behavioral and psychological adaptation occurred in home-working settings. • Extraversion and neuroticism were associated with a higher neutral temperature. Hybrid work has been widely adopted, but thermal comfort in home workspaces has received less attention than that in laboratories and offices. The adaptability of home workspaces may be associated with individual differences, including those related to personality traits. Thus, the analysis focused on two issues: (i) the relationships among temperature, humidity, and thermal sensation at home, and what neutral temperatures arise in summer and winter; and (ii) how these relationships vary with personality traits. A field survey was conducted in the Tokyo metropolitan area. In situ physical measurements of indoor air temperature and relative humidity were obtained simultaneously in 60 homes in summer and 190 in winter, and these measurements were paired with concurrent occupant evaluations while working from home. Ordinal logistic regression estimated neutral temperatures of 28.1 °C in summer and 21.0 °C in winter, which is a wider seasonal gap than is commonly reported for offices. The associations between personality traits and neutral temperature differed by season. In summer, higher levels of extraversion and neuroticism were associated with a higher neutral temperature. For neuroticism, shifting from −1 to +1 standard deviation moved the neutral temperature from 27.4 to 28.8 °C (Δ 1.4 °C). In winter, the neutral temperature increased with extraversion and decreased with openness. These results highlight season- and personality-related variation in estimated neutral temperatures and provide empirical benchmarks for thermal comfort in home workspaces.