text: The American Heritage Dictionary of the English Language identifies room temperature as around , while the Oxford English Dictionary states that it is "conventionally taken as about ".
  Ideal room temperature varies vastly depending on the surrounding climate. Studies from Indonesia have shown that the range of comfortable temperature falls between  for local residents. Studies from Nigeria show a comfortable temperature range of , comfortably cool  and comfortably warm . A field study conducted in Hyderabad, India returned a comfort band of  with a mean of . A study conducted in Jaipur, India among healthy young men showed that the neutral thermal comfort temperature was analyzed to be , although a range of  was found.
  People are highly sensitive to even small differences in environmental temperature. At 24 °C, a difference of 0.38 °C can be detected between the temperature of two rooms. 
  Owing to variations in humidity and (likely) clothing, recommendations for summer and winter may vary; a suggested typical range for summer is , with that for winter being . Some studies have suggested that thermal comfort preferences of men and women may differ significantly, with women on average preferring higher ambient temperatures.
  In the recent past it was common for house temperatures to be kept below the comfort level; a 1978 UK study found average indoor home temperatures to be  while Japan in 1980 had median home temperatures of  to .
  Rooms may be maintained at an ambient temperature above the comfort temperature in hot weather, or below it in cold weather, if required by cost considerations or practical issues (e.g. lack of air conditioning or relatively high expense of heating.)
  In the UK, the Offices, Shops and Railway Premises Act 1963 provides for a minimum temperature in commercial premises, but not for a maximum temperature.