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Cheap hollowcore planks provide useful radiant thermal mass for passive cooling Workspaces can be divided into smaller units on a domestic scale, or larger 50 desk spaces running the length of a terrace Cool northlight provides high levels of daylight without expensive shading or active cooling copyright 2004

Project Balance Sheet - case studies - BedZED

Retrofit for the Future TSB competition

Bournemead Close retrofit The ZEDfactory designed one of the 80 wining projects to find ways of retrofitting existing houses to reduce carbon emissions by 80% Retrofit for the Future TSB competition The only house part of the project to be retrofitted with occupants still in the house. Polystyrene beading was blown under the floor boards to avoid them having to be pulled up to insulate underneath.

Retrofit for the Future TSB competition

A solar shed in the garden provides solar electricity and solar hot water for the house, where no south facing roof slope was available. Retrofit for the Future TSB competition

Imagine that 4.5 kw peak of large translucent photovoltaic roof tiles fixed to 100x50 mm batons could be installed and grid connected for around 10,000-00 Panel prices have dropped to 1-50 / watt peak for building integrated roofs This generates an annual FITS income of around 1,500-00

Integrated exhaust Air Source heat pump providing all year round solar thermal DHW Integrates with solar thermal collectors Highly efficient water heating (COP3.5) 285L capacity tank Only cuts in when needed Powered by the excess PV production Avoids need for back up biomass combustion in zero heating spec homes

Larger scale 6 kw thermal output ground source heat pumps scavenging low grade heat from groundsource coils or energy piles for existing properties Retrofit strategy Reduce fabric heat loss by underfloor, external wall and loft insulation plus ddraughtproofing Replace existing tile or slate type roof with HiminZED energy roof Install solar thermal and heat pump technology in Loft space and roof Generate enough electricity to power appliances, lighting and Heat Pumps in appropriate locations Claim RHIs and FITS and have effectively no energy bills

The cost of the FITS elilgible solar roof is far lower because the tiles are large, they are fast to fit, and they replace the need for a conventional roof in fact the completed roof is not much more expensive than a high quality slate or tile roof - Its important to add solar thermal collectors to give summer domestic hot water demand

ZEDroof testing at BedZED 2011

Imagine an attic conservatory providing a useful all weather indoor garden By making the space between the durable monocrystalline silicon wafers translucent, and allowing sunlight in as well as incorporating Velux rooflights for ventilatiion - the previously low value loft space can become a rooftop conservatory adding extra sheltered unheated amenity space

Which can be used for upgrading existing buildings of all ages, providing insulation is placed above the top floor ceiling

Retro-fitting existing properties Chalkwell Hall, Southend on Sea Grade 2 listed

And if new homes or offices or even schools are planned to have large southish facing roofs sitting on top of very energy efficient superinsulated and draufghtproof ed Accommodation The cost of this spec including energy roof, kitchen and foundations is around 1250-00/ m2 gross internal floor area

If we then add optional additional solar electric porches and car ports, we can generate enough annual electrcity to power normal annual mileages of lightweight electric vehicles running up to 7500,miles a year/ home or further if e bikes and scooters are used. The street of the future will look different on each side of the road.

Its completely possible to reconcile the place making agenda with zero carbon urbanism creating delightful human scale streetscape and public open space