What is Passivhaus?
Passivhaus is the leading international low energy building standard and methodology. Developed in the early 1990s and managed by the Passivhaus Institut in Germany, the standard can be applied to both newbuild and existing buildings, with the EnerPHit standard as the Passivhaus standard for retrofit projects. The Passivhaus standard is a tried and tested ‘fabric first’ approach, grounded in building physics. To design and certify a building to the Passivhaus or EnerPHit standards the building must be designed using Passivhaus Planning Package (PHPP) software. Even if your project can’t achieve the Passivhaus or EnerPHit standards, designing a project using PHPP gives a good in-depth understanding of how it will perform.
Passivhaus buildings offer high levels of comfort for occupants and use little energy for heating or cooling. Passivhaus buildings achieve a 75% reduction in space heating needed, compared to standard UK newbuild building regulations.
Key features of Passivhaus design
- High levels of insulation
- Continuity of insulation to minimise thermal bridging
- Stringent airtightness levels
- Use of mechanical ventilation with heat recovery
- Optimising passive solar gains to ensure summer and winter comfort
Minimal performance gap
Evidence and feedback from 25 years of Passivhaus buildings show that Passivhaus buildings are performing as designed. By contrast, the discrepancy between as-designed and as-built performance for many new UK buildings can be as much as 50-100%.
Our Passivhaus services
Enhabit’s Building Physics team has extensive knowledge and experience of modelling Passivhaus projects and can help with all Passivhaus or EnerPHit design stages, from first planning stages to preparing a project for certification. Our Certified Passivhaus Designers and Consultants can support everything from one-off retrofit projects to large-scale social housing schemes.
Contact us to find out how we can help you to take control of your project.