A Passivhaus, often called a passive house, is a building designed to use extremely little energy for heating and cooling. The standard was developed to create homes that stay comfortable throughout the year while dramatically reducing energy use.
Unlike traditional buildings that rely heavily on heating systems, a Passivhaus works by preventing heat from escaping in the first place.
The result is a home that stays warm in winter, cool in summer, and requires far less energy to run.
How Passivhaus Works
The idea behind Passivhaus design is simple. Instead of constantly adding heat, the building is designed to hold on to the warmth that already exists inside.
This is achieved through careful design and construction techniques that limit heat loss and control ventilation.
A Passivhaus typically uses around 75 percent less heating energy compared to a standard home.
The Five Principles of Passivhaus
There are five main elements that work together to achieve the standard.
High levels of insulation
Walls, floors and roofs are heavily insulated to reduce heat escaping through the building fabric.
Airtight construction
Air leaks are sealed so warm air cannot escape through gaps and cracks.
High performance windows
Windows are designed to reduce heat loss while allowing solar warmth to enter the building.
Thermal bridge free design
Construction details are designed to prevent heat escaping through weak points in the structure.
Mechanical ventilation with heat recovery (MVHR)
Fresh air is supplied through a ventilation system that recovers heat from outgoing air.
Why Passivhaus Homes Are So Comfortable
One of the biggest differences people notice in a Passivhaus is the comfort.
Temperatures remain stable throughout the home, without cold spots or draughts. Because ventilation is controlled, indoor air quality is also improved.
Many people find these homes quieter as well, thanks to better insulation and airtight construction.
Why Passivhaus Is Becoming More Popular
Energy costs and environmental concerns are driving more homeowners and developers to look for ways to reduce energy use.
Passivhaus provides a proven way to build homes that are both efficient and comfortable, while reducing long-term running costs.
For anyone planning a new build or major renovation, understanding the principles of Passivhaus is a useful first step.
