Survey on Summer Sleep Environment: The 'Air Conditioning Sleep Dilemma' Persists Despite Efforts

TENTIAL, a conditioning brand dedicated to realizing a health-conscious society, conducted a survey on 'Summer Sleep Environments' targeting 400 men and women aged 20-60 across Japan.

The results highlight the 'Air Conditioning Sleep Dilemma': while room temperature control, such as adjusting air conditioning, is standard, over 60% of those taking measures still report 'poor sleep quality' and 'fatigue upon waking.' Furthermore, over 70% of respondents expressed interest in 'temperature and humidity-regulating bedding' as a new solution to bridge this gap.

The core issue lies in an oversight regarding the 'bed environment' (the conditions inside the futon), which is crucial for deep sleep. While maintaining a temperature of 33°C and humidity of 50% inside the bedding is key, 70% of people were unaware of this fact, and over 80% have not implemented any humidity countermeasures for their bedding. Even with air conditioning, over 50% reported waking up due to 'heat and stuffiness,' indicating that room temperature management alone cannot solve moisture buildup.

In this era of record-breaking heat, effective summer sleep strategies must include both 'lowering room temperature' and 'optimizing the environment inside the bedding.' TENTIAL suggests a 'Hybrid Sleep Strategy' for the summer of 2026: managing external air with air conditioning and internal bed conditions with high-function bedding to maximize next-day performance.

Key Survey Findings:
- Summer is cited as the most difficult season for sleep (68.7% report dissatisfaction).
- 61.2% of those taking measures report 'feeling tired/fatigued upon waking.'
- 53.7% of AC users report waking up due to 'heat or stuffiness.'
- 70.0% are unaware of the necessity of humidity management inside bedding.
- 70.3% express interest in automatic temperature/humidity-regulating bedding.