First one was built 20 years ago but getting more popular after 2010. You can order them, it's a building standard so does not require anything from you except money. But they say it's not that much more expensive than a normal swedish house since we already have a lot of isolation and 3 glass windows as standard for the climate.
So what is the difference and why does my modern Swedish house, with heat recovery ventilation and east-south facing windows consumes more energy to heat?
