1. Temperature indoor should be around 20°C- most of the people feel best in 20°C.
2. When nobody's at home lower the temperature to 15-17 °C. House won’t be cooled but charges will be lower.
3. Don’t block heaters by furniture.
4. Airing the room should be short but intensive.
5. If heating pipes are in unheated rooms you can warm them additionally.