Increase of heat stroke risk is one kind of damage that can result from global warming. Recently, air-conditioner use has become a heat stroke countermeasure. Studies of air-conditioner use and sleep quality have been conducted. Kubo et al.[1] conducted a questionnaire survey designed to evaluate thermal environment changes from airconditioner
use during sleep. Results show that air-conditioner use during sleep affects thermal comfort when waking up. Ishimaru et al.[2] surveyed thermal environments during sleep. They reported that air-conditioner use causes waking up during sleep by a timer function.
Sakane et al.[3] administered a questionnaire survey to Osaka City apartment residents in September 2012 to assess parameters of living environments, air-conditioner use, and sleep quality. Results revealed that the sleep quality of full time workers is affected by ‘residential heating and cooling performance’, ‘solar heat from windows’,
and the air-conditioner use frequency during the day. This study reveals relations of sleep and air-conditioner use in respondents who spent a long time at home. The study purposes are 1) extraction of the differences of relation between residential thermal performance and sleep quality by air-conditioner use, and 2) extraction of differences in distributions of responses to items according to air-conditioner use.