Passivhaus Design of a Paragraph 55 Building

 

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This project is a new dwelling at existing accommodation and venue hire facilities. Planning permission was granted through the challenging Paragraph 55 application process.

The conditions of the planning require the building to be innovative and sustainable. Permission was given on the condition that the building achieves Passivhaus certification and will be monitored post completion to ensure it performs as designed.

Greengauge are working with the architects to provide fabric efficiency design advice, completion of the Passivhaus PHPP calculation tool, overheating risk assessment, supporting calculations for thermal bridging (PSI values).

The 360 degree form of the Lighthouse has provided us with plenty of Passivhaus challenges. The initial PHPP calculation indicated that the performance and design of the windows and solar shading were very important. Greengauge provided a detailed energy performance review comparing over 10 different window manufacturers’ details to establish which windows would perform the most efficiently and meet the architectural and structural criteria set out by the design team. The glazing design was also an essential part of the overheating risk assessment. Greengauge completed a dynamic thermal model to establish the overheating risk.

The structural implications of the design required particular attention with regards to thermal bridging. Greengauge provided advice and thermal bridging calculations to ascertain the impact on total energy demand each bridge would have.

Onsite, Greengauge are providing support to ensure standards are met and will be assembling the information necessary for Passivhaus certification.

We are currently building our own monitoring equipment and data logging software to provide the necessary level of energy and performance monitoring to meet the planning condition requirements.

Client: The Lighthouse UK www.lighthouse-uk.com

Architect: CaSA www.casa-architects.com

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