Passivhaus Plus

This building will meet the same criteria as Passivhaus Classic with primary energy use met on site with renewable energy sources.

 

Passivhaus Premium

This building will also meet the same criteria as Passivhaus Classic, but primary energy use on site is exceeded with renewable energy sources.

 

Energy Conservation Building (not a Passivhaus)

This building just misses achieving the Passivhaus standard, but is still very efficient.  It is assessed using the Passivhaus planning Package. The criteria are:

 

Heating Demand                           

30 kWh/sq m ​​​​​​​​​/year (for a typical 100 sq m  house with electricity at 14p/kWh, the annual  heating cost is £420.16 or £8.08 per week).

 

Primary Energy Demand

140 kWh/sq m/year (this is total energy use, including losses in transmission cables, the power station and extracting fuel).​​

EnerPHit – Passivhaus for Retrofit

Different targets can be used which address the challenges posed by existing buildings.

For these the EnerPHit criteria for air tightness and heating demand apply, the other criteria being the same as Passivhaus:

EnerPHit Heating Demand             25 kWh/sq m/year.
EnerPHit Peak Heating Load         10 W/sq m.
EnerPHit Air-tightness                    1.0 air change per hour at 50Pa pressure (no draughts).

Passivhaus Standards

The Passivhaus Institut in Germany in 2014 introduced additional Passivhaus categories to ensure that Passivhaus meets EU standards for all new developments to be ‘Nearly Zero Energy Buildings’ in 2021.  These categories are:

 

Passivhaus Classic  - the rebranded current Passivhaus standard, which is described in this website. For new buildings this remains the minimum standard to be reached before Passivhaus Plus and Passivhaus Premium standards can be awarded.

 

A Passivhaus Classic will be certified when it meets the following criteria:

Energy

 

​Heating Demand 

 

 

Peak Heating Load

 

 

Primary Energy Demand

 

 

Comfort

 

Low air leakage

Surface Temperatures

Summer Overheating 

Ventilation (fresh air)

 

 

 

15 kWh/sq m /year (for a typical 100 sq m  house with electricity at 14p/kWh, the annual heating cost is £210 or £4.04 per week).



10 W/sq m (for a typical 100 sq m house a single 1kW heater, or ten 100W light bulbs will heat the whole house on the coldest day of the year).


120 kWh/sq m/year (this is total energy use, including losses in transmission cables, the power station and extracting fuel).

 


0.6 air changes per hour at 50Pa pressure (no draughts).
No less than 17 degrees C on the coldest day, including windows.
No more than 10% of annual hours greater than 25 degrees C.
Approx. 30 
cu
 m/hour per person – a scientifically proven level of fresh air optimum for health.