According to the West Midlands Public Health Observatory ( UK ) , 22 Â C ( 71.6 Â F ) is the recommended living room temperature , and 18 Â C ( 64.4 Â F ) is a good bedroom temperature . In the United Kingdom for instance , room temperature is traditionally 18 Â C ( 64 Â F ) but is now regarded as being too cool , possibly due to the widespread use of central heating . Room temperature may otherwise be indicated by general human comfort , with the common range of 20 Â C ( 68 Â F ) to 29 Â C ( 84 Â F ) , though people may become acclimatized to higher or lower temperatures .