App 1/4 of the heating is lost through ventilation: bathroom, kitchen and leaks

Fig. 1 Household heating loss (Birch & Krogboe in Nielsen and Dyck-Madsen 2006).

The total heated area in Denmark has increased over time, but actual heating consumption has decreased.That is, buildings use less energy per square meter today. This is due to:

• tightened energy regulation
• energy savings, and
• combined heat and power production, where excess heat from electricity generation is used for heating.