This library of common solutions will, in turn, mean that on each project, none of the construction design work necessarily needs to be done from scratch.
The design must achieve the following targets to gain Passivhaus certification:.A heating energy demand of < 15 kWh/m²/yr or a maximum required heating power of 10 W/m2.
Avoid overheating or have a cooling system demanding < 15 kWh/m2/yr.Achieve an air tightness of ≤ 0.6 air changes/ hr @ n50.The building design also needs to achieve low primary energy & renewable demand.
This is a combined target and is based on the energy consumed by building systems and the renewable energy generated by building mounted wind, photovoltaics or solar thermal systems.. For the above reasons, Passivhaus is a suitable standard for clients and developers that seek a well-established, sustainability standard to deliver low energy buildings with the highest construction quality, aspiring to net zero carbon in operation.. Bryden Wood’s 10-step approach to Passivhaus building design and construction.Whilst there is no fixed formula to Passivhaus, Bryden Wood proposes the achievement of the above targets via the following 10 steps, which relate both to design decisions and construction specifications for improved sustainability:.
A compact shape with low building envelope to volume ratios.. Building orientation to benefit from useful solar gains.. Optimised window sizes to capitalise on useful solar gains, reduce heat losses and deliver exemplary levels of natural light into the building..
Highly insulated walls, floors and roofs.. Site specific shading to mitigate summertime overheating, whilst allowing winter solar heat gains.. High performance triple glazing with thermally bridge- free heads, jams and sills.. A thermal bridge-free building via detailed design of junctions, and clear and easily buildable air seal lines, to deliver the specified air permeability..As the environment changes and technology shifts, more – and more complex – gears emerge.
Design to Value seeks to future-proof modes of design to create a more agile space in which accelerated and increased challenges can be adapted to.With this we can better anticipate and care for future generations and beyond.. To purchase this book, visit.Jaimie Johnston MBE.
, Head of Global Systems at Bryden Wood, has an engaging conversation with the 'Queen of Prefab', Amy Marks, the Vice President of Enterprise Transformation Practice at Autodesk.Together, they discuss the.