Passivhaus Building Standards

For a building to achieve Passivhaus status it would have to meet the following criteria;

Space Heating and Space Cooling Demand, Primary Energy Demand, Air tightness and Thermal Comfort

Heating and energy demands have to be strictly reduced by prioritising excellent insulation and air tightness throughout the building to create a highly efficient home. Floors, ceilings and walls must have a U value (thermal performance) of a minimum of 0.15 and ideally even less to achieve passivhaus status. Thermal breaks in insulation are typically found around windows or the at the joints between floors and walls. All of these breaks must be eliminated and will, therefore, require a significant layer of insulation. Triple glazed, thermally broken and inframed ventilation system windows provide a climate control system whatever the weather.

Insulation choice is key to meeting the standards of a passivhaus from maximising available space, long term performance and cost effectiveness. All insulation can meet the standard but there are some materials that will offer premium levels of thermal performance and are thinner than the more commonly used insulation. This allows for the floor, walls and roof construction to be less thick.

The choice of a structural walling system also plays a key role with a view to achieving low air tightness levels. All of our modular systems can achieve passivhaus standard by thorough quality control management whilst the building is in production.

Thermal comfort for all living areas must be met all year round with not more than 10% of the hours in any given year exceeding 25 Degrees Celsius.