The way in which we perceive temperature is affected by many factors. What one person perceives as warm, another person can perceive as cold, and in order to achieve a functioning indoor climate, many factors must agree. There is a lot that we can do before we turn up the heat. Set up a thermometer and keep a check on the temperature in the room. If you then lower the temperature by one degree from what you have today, you will have reduced your energy consumption by 5%.