| Division | Unit | General MDU to which the Standard for Energy-saving Design by year was applied | |||
|---|---|---|---|---|---|
| 2001 | 2008 | 2011 | 2013 | ||
| Annual heating energy demand (per unit area) | kWh/m2･year | 157.65 | 132.01 | 93.95 | 71.84 |
| Annual heating energy demand (per household) | kWh/household･year | 16,553 | 13,861 | 9,865 | 7,543 |
| Unit conversion | MJ/household･year | 59,590 | 49,900 | 35,512 | 27,155 |
| Unit price per gas heating value | KRW/MJ | 23 | 23 | 23 | 23 |
| Annual heating cost (per household) | KRW 1,000/household･year | 1,515 | 1,269 | 903 | 691 |