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Room temperature is a common term to denote a certain temperature to which humans are accustomed. It is, under normal conditions, 21°C (70°F).
According to the West Midlands Public Health Observatory (UK), an adequate level of warmth for older people (aged 58 and above) is 21 °C (70 °F) in offices and 18 °C (64 °F) in other occupied rooms. 24 °C (75 °F) is stated as the maximum comfortable room temperature.
Owing to variations in humidity and likely clothing, recommendations for summer and winter may vary; one for summer is 23 °C (73 °F) to 26 °C (79 °F), with that for winter being 20 °C (68 °F) to 23 °C (73 °F). Although by other considerations the maximum should be below 24 °C (75 °F) – for sick building syndrome avoidance, below 22 °C (72 °F).
Ambient versus room temperature
Room temperature implies a temperature inside a temperature-controlled building. Ambient temperature simply means "the temperature of the surroundings" and will be the same as room temperature indoors. In many languages, such as Spanish and Italian, there is an expression for ambient temperature, but no distinct translation for room temperature.
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