PHI Building Criteria
Category:
Technical Paper
Publication date: May 2022
Reading time: 3-8 hours
Levels: Introductory / Intermediate / Advanced
Target audience: Clients, Policy makers, Contractors, Students, Architects, PH Designer/Consultant, Services engineers
Publication date: May 2022
Reading time: 3-8 hours
Levels: Introductory / Intermediate / Advanced
Target audience: Clients, Policy makers, Contractors, Students, Architects, PH Designer/Consultant, Services engineers
Performance targets for a European climate
Passivhaus | EnerPHit | ||
Airtightness n50 | ≤ 0.6 ACH @ 50 Pa | ≤ 1 ACH @ 50 Pa | |
Space Heating Demand (SHD) | ≤ 15 kWh/m².a | – | ≤ 25 kWh/m².a (variable)* |
Peak heating load (alternative criterion) | – | ≤ 10 W/m² | – |
Primary Energy Renewable (PER) | ≤ 60 kWh/m².a | ≤ 60 kWh/m².a (variable)* | |
Space cooling demand | ≤ 15 kWh/m².a | ≤ 25 kWh/m2. yr | |
Surface temperature | ≥ 17 °C | ≥ 17 °C | |
Overheating | Max 10% > 25°C | Max 10% > 25°C |
*For EnerPHit, the heating demand target varies according to climate zone, of which the UK spans three, most falling into 25 kWh/m².a. PER varies by building use, and, in retrofit, by allowance for larger heating and cooling demand compared to a new build.
The table above shows headline criteria for Passivhaus new build and retrofit. Readers must refer to the full criteria to ensure they have the correct values for their specific project – variations may apply. More information and detailed criteria on the different Passivhaus classes, Classic, Plus, & Premium, can be found here.
All Passivhaus projects must use the design tool Passive House Planning Package (PHPP).
Read more about Passivhaus Certification.