Restful sleep depends on the environment in which the body rests. A study published in the Journal of Physiological Anthropology identifies the range between 16 °C and 20 °C as the ideal room temperature for sleep, with a direct impact on the deepest stages of the sleep cycle. Outside this range, the body works to compensate for temperature fluctuations, which reduces the efficiency of rest. When it comes to bedroom climate control, temperature is the starting point, but not the only factor.
Temperature and Sleep Cycles
Body temperature naturally drops in the hours leading up to sleep. This physiological mechanism signals to the body that it is time to rest. In very hot environments, the body needs to sweat to regulate its internal temperature, which causes frequent awakenings. In excessively cold environments, the body expends additional energy to maintain body heat, which reduces relaxation.
In homes, setting the air conditioner to the appropriate range requires considering the size of the room, the number of occupants, the presence of electronics in use at night, and the thermal insulation of the walls and windows. Units with a silent mode and sleep function help maintain a stable room temperature without causing noise discomfort.
Relative humidity and respiratory comfort
In regions such as the Midwest, relative humidity drops to very low levels during the dry season. In air-conditioned rooms, air conditioning tends to reduce this humidity even further, intensifying dryness in the airways. Patrick Galletti, an HVAC engineer and CEO of Grupo RETEC, points out that climate control requires attention to temperature, humidity, and air exchange.
The relative humidity range recommended by the WHO for indoor environments is between 40% and 70%. In very dry conditions, the use of humidifiers in bedrooms or climate control systems with humidity control creates an environment conducive to comfortable sleep and protects the respiratory tract during the night.
Air quality in the bedroom
Air exchange and filtration have a direct effect on how you feel when you wake up. In rooms with low air exchange, carbon dioxide levels rise overnight, contributing to a feeling of fatigue in the morning even after eight hours of sleep. In urban environments, fine particulate matter and outdoor pollutants also affect indoor air quality when building airtightness is poor or when the HVAC system lacks adequate filtration.
The latest air conditioner models incorporate more efficient filters and, in some cases, ionizers. In residential settings with sensitive individuals or patients with chronic respiratory conditions, the combination of proper climate control and supplemental air purification offers more consistent control over air quality.
Maintenance and Operation
Equipment that lacks preventive maintenance has the opposite effect than intended. Clogged filters, coils with accumulated dirt, and condensate without proper drainage promote the proliferation of mold and bacteria. Periodic cleaning and filter replacement as recommended by the manufacturer are integral to the equipment’s performance, not merely an optional detail.
In corporate settings and hotels, proper system design takes into account variable occupancy, periods of use, and regulatory requirements for indoor air quality. In residential settings, basic maintenance and proper operation adjustments alone can yield significant benefits.
Practical Tips for the Bedroom
- - Adjust the temperature to a comfort range suitable for nighttime use, taking into account the room's insulation.
- - Check the relative humidity during dry seasons and consider using a humidifier when necessary.
- - Keep the air conditioner's preventive maintenance up to date, including periodic cleaning of the filters.
- - Consider equipment with adequate filtration when there are people who are sensitive to allergens.
- - Reduce internal sources of pollutants in the bedroom, such as volatile chemicals and excessive moisture in nearby bathrooms.
RETEC provides solutions for residential and commercial climate control, with specialized support for projects that require precise control of temperature, humidity, and air quality. Contact the sales team for technical specifications tailored to each environment.
We were featured in an article on this topic in Mundo do Ar Condicionado e da Refrigeração. The relationship between air conditioning and sleep quality was discussed in an article featuring Patrick Galletti, CEO of Grupo RETEC. Read it at: https://mundodoaredarefrigeracao.com.br/produto/temperatura-e-qualidade-do-ar-sao-determinantes-para-noites-mais-tranquilas-e-reparadoras/