Wilkinson Primary School: Heating & Cooling

Wilkinson Primary School operates a mixed mode ventilation strategy. In the summer months, the building is generally heated and cooled naturally, whereas in the winter the internal environment is controlled by an MVHR (Mechanical Ventilation with Heat Recovery), as demonstrated on the diagram.

A single 90kW boiler provides the full heating load for the school. 

Domestic hot water is provided using local electric water heaters rather than a centralised system, to minimise heat loss from circulatory hot water pipework. 

Microbore copper pipework has been used between hot water heaters and outlets, with each pipe precisely sized to suit the flow rate of the relevant tap. This has meant that no electric trace heating has been necessary, and deadleg volumes are kept to an absolute minimum. This is an innovation that has proved successful in use and has led to significant energy savings.

Glazed areas are Passivhaus certified and engineered to be less than previous Passivhaus schemes, whilst still achieving excellent daylight levels, and adequate passive solar gain.

The shading strategy was developed from the outset. Elements of the structure such as roof overhangs and play canopies were designed as part of the shading strategy and as a result no dedicated bre-soliel system was required.

The shading angles have been developed to ensure maximum shading, whilst allowing light to cascade through to the deep span spaces.

The main roof overhang is a continuation of the 15 degree pitch roof on the first and double height floor windows, complimented by the play canopies, also designed at 15 degrees. These canopies are aligned with the highest window transom, allowing light to be bounced into the classroom at a high level.

The power use for lighting is as low as 5.6W/m2 in classrooms.

Quote:

‘The school feels really airy, which we were especially thankful for during the hot summer’

Teaching Assistant / Wilkinson Primary School

 

Wilkinson Primary School operates a mixed mode ventilation strategy. In the summer months, the building is generally heated and cooled naturally, whereas in the winter the internal environment is controlled by an MVHR (Mechanical Ventilation with Heat Recovery), as demonstrated in the diagram.


wilkinson primary school mvhr 1
MVHR ventilation

wilkinson primary school mvhr 2

MVHR extraction
 

A single 90kW boiler provides the full heating load for the school. 

Domestic hot water is provided using local electric water heaters rather than a centralised system, to minimise heat loss from circulatory hot water pipework. 

 

Microbore copper pipework has been used between hot water heaters and outlets, with each pipe precisely sized to suit the flow rate of the relevant tap. This has meant that no electric trace heating has been necessary, and deadleg volumes are kept to an absolute minimum. This is an innovation that has proved successful in use and has led to significant energy savings.

 

Glazed areas are Passivhaus certified and engineered to be less than previous Passivhaus schemes, whilst still achieving excellent daylight levels, and adequate passive solar gain.

 

The shading strategy was developed from the outset. Elements of the structure such as roof overhangs and play canopies were designed as part of the shading strategy and as a result no dedicated bre-soliel system was required.


wilkinson shading strategy

 

The shading angles have been developed to ensure maximum shading, whilst allowing light to cascade through to the deep span spaces.

 

The main roof overhang is a continuation of the 15 degree pitch roof on the first and double height floor windows, complimented by the play canopies, also designed at 15 degrees. These canopies are aligned with the highest window transom, allowing light to be bounced into the classroom at a high level.

 

The power use for lighting is as low as 5.6W/m2 in classrooms.