The passive house / Passivhaus system uses technologies that are available today combined with extremely rigorous standards for home energy efficiency.
It requires a mix of high-tech, like heat-exchange ventilators, superinsulation and triple-pained windows, as well as low-tech, like big thick, well-insulated walls and solar design.
Because a Passivhaus is air-tight it needs special ventilators that pump in fresh air without pumping out the home’s heat.
These principles makes houses so efficient that they can take on a German winter with nothing more than the heat from a hair dryer.
In the end, Passivhaus blows even LEED Platinum out of the water, requiring 70% less energy for heating than a LEED certified home.
© Flavia Westerwelle