PassiveHouse

The standard says,

• Space heating <= 15 kWh/m²/yr,
• an airtightness limit of 0.6ACH@50Pa (air changes per hour at 50 Pascals),
• total primary energy demand <= 60 kWh/m²/yr.

For our house, at 244m², this works out at:

• Heating <= 3,660 kWh over the year.
• Total primary energy need <= 14,640 kWh over the year.