Paring evidence-based design with tried and tested delivery for cost certainty 

We are confident that Patrwm 21 can deliver on our ambitious promise because our model is based on evidence

 

Proven Benefits of passivhaus

Patrwm 21 architects,  Architype have been designing Passivhaus schools since 2010, when the first Passivhaus schools in the UK were delivered.

Now on their 12th Passivhaus school project, they have diligently monitored the performance of their built schools; both energy in use and internal comfort; providing evidence on the financial and health benefits of Passivhaus.

The powerful results of the performance monitoring have inspired  and supported the Passivhaus offer of Patrwm 21.

ENERGY IN USE

The thermal energy use in a typical Architype Passivhaus School  compared to a typical UK school, a best practice school and the CIBSE TM46 benchmark. The Passivhaus school shows a 90% education in thermal energy use on the typical school built to UK building regulations.

ENERGY USE GRAPH.jpg
 

SUPPORTING HEALTH + WELLBEING

PASSIVHAUS - A COMFORT STANDARD

By monitoring the temperature and carbon dioxide concentrations in classrooms, we can make some conclusions regarding the indoor air quality.

We have monitored a classroom inside a Passivhaus school, comparing it with a typical classroom in a conventional school built to building regulations.

MONITORING TEMPERATURE

 During a winter week, the conventional school classroom does not reach the desired comfort temperature of 21 degrees celsius. Pupils and teachers would be feeling chilly and slightly uncomfortable.  The Passivhaus school maintains ideal temperatures of 21-23 degrees during occupied hours, with no or little use of radiators.

During a winter week, the conventional school classroom does not reach the desired comfort temperature of 21 degrees celsius. Pupils and teachers would be feeling chilly and slightly uncomfortable.

The Passivhaus school maintains ideal temperatures of 21-23 degrees during occupied hours, with no or little use of radiators.

MONITORING CARBON DIOXIDE

 Measuring the carbon dioxide concentration in classrooms tells us about the quality of the air. This is particularly interesting in an educational environment.  The maximum carbon dioxide concentration in classrooms should not exceed 5000 particles per million, ass shown with the red line. Excess of this will begin to impede teachers and pupil performance negatively.  As shown on the graph, the conventional school has frequently high levels of carbon dioxide during occupied hours, always much higher than the average limit and on Monday, exceeding the upper limit.  The Passivhaus school remains well below the average limit every day, helping pupils stay fresh and alert all through the day

Measuring the carbon dioxide concentration in classrooms tells us about the quality of the air. This is particularly interesting in an educational environment.

The maximum carbon dioxide concentration in classrooms should not exceed 5000 particles per million, ass shown with the red line. Excess of this will begin to impede teachers and pupil performance negatively.

As shown on the graph, the conventional school has frequently high levels of carbon dioxide during occupied hours, always much higher than the average limit and on Monday, exceeding the upper limit.

The Passivhaus school remains well below the average limit every day, helping pupils stay fresh and alert all through the day

 
The children are more alert in the afternoon and are more attentive because the air is so fresh and comfortable. The daylight is just fantastic. It has raised our spirits, the children and teachers love our passivhaus school.
— Sara Morris, Headteacher, Oak Meadow Passivhaus Primary School
We’ve radically reduced our energy bills since moving to our new building. Previously we could expect to pay £45,000 a year but this year it was £5,000. I had to phone our supplier to check it was correct! For us that is the price of an extra teacher.
— Kay Mason, Headteacher, Bushbury Hill Passivhaus Primary School