Low-energy or passive house

More and more people deciding about construction of family house consider energy saving house, understand buildings, which use way less energy for heating than classic houses. Let´s be honest here, reason is not only ecological and respect towards nature, even thought this side of issue is serious. Last but not least is significant and quicker financial return of  low-energy of passive house. And this really worth for thought, right?
Low-energy family house
Low-energy…