Passivhaus technology has quietly revolutionized both the energy use and indoor air quality in building.
Some of the benefits of a Passivhaus are:
What is a Passivhaus?
The definition of a passivhaus is based on its extremely low energy need. Passivhaus buildings consume less than a quarter of the energy required for a standard building. They have no separate heating systems apart from heat recovery ventilation. The efficiency is based on well-insulated and air-tight passive building envelope solutions.
The objective of a passivhaus building is to minimize the energy need of buildings economically and produce a good microclimate in buildings. The heat loss of a passivhaus is so small that a normal heat distribution system is unnecessary. The initial investment in a passivhaus may be larger than in a "normal" building, but the operating and life cycle expenses will be remarkably lower than in a "normal" building.
The level of thermal insulation in structures is better than in normal low-energy buildings. The structures are designed and built without any thermal bridges that reduce heat insulation. The building’s outer shell is air-tight and the microclimate is draught-free and evenly warm. The high annual utilization rate of heat recovery in ventilation guarantees only minor heat losses in ventilation. The remaining small energy need for heating can be covered using simple building system solutions.