Building Solutions & Wellbeing

The Energy Balance

NEW BUILDINGS

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Energy balance in new buildings – simplified:

On the left hand are the losses from the building:
• infiltration and
• transmission heat losses.

On the right hand the gains to the inside of the house:
• through the power of the sun entering through windows,
• through the temperature of people, equipment, computers, the ground, and
• external energy input.

Outside of the building there are the so called ‘neutral gains’ including solar, wind and geothermal.

OLD BUILDINGS

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Energy balance in old buildings – simplified:

On the left hand are the losses from the building:
• infiltration – relatively easy to make more efficient
• transmission heat losses – difficult to reduce

On the right hand the gains to the inside of the house:
• size and location of openings (windows/doors) – insolation gains hard to achieve,
• through the temperature of people, equipment, computers, the ground and
• external energy input.

Outside of the building there are the so called ‘neutral gains’ including solar, wind and geothermal –
large proportion of gains possible

The future: old and new becomes one

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State of the Art ‘Passivhaus’ is already a proven standard, good technological solutions and
our ‘Green-Cube’ mechanical heat recovery system will provide the necessary heating and
cooling to the building.

However, there is still one very important consideration: We also need to study the energy
required to construct the building!

We need therefore to find a life time cycle energy balance integrating ALL phases of a
building from design, through construction and also to include maintenance and in later life
renovation through to demolition and the possibility of recycling old substance.

And in the end – maybe the most difficult but also the most effective way to save energy is
retrofitting. The amount of energy saved in constructing a new house, internal savings can
have a much stronger effect on the life cycle energy balance then the mere construction of
new houses.

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In the future, we strongly believe that you cannot ONLY look at retrofitting or ONLY at new
Passivhaus or Plus houses or zero houses, you must look also at the community as a whole
with clusters and clouds:
• Living
• Teaching
• Working
• Shopping
• Leisure

We believe that only the integration of all forms of living and working space, the clustering
and clouding of new and old substance will make the difference and will be able to lead us to
ruling/governing life cycles:
• life time cycles for the construction of new buildings,
• retrofit old structure, and
• we need to find ways to recycle the old substance when its life cycle has ended.

Sustainable Procurement and Construction

Sustainable Procurement and Construction will:
• Reduce carbon emissions
• Preserve and promote healthy ecosystems
• Benefit the locality
• Save money by using resources more efficiently
• Create a better environment for people to live in

Sustainable procurement is a management process used to secure the acquisition of
goods and services in a way that ensures that there is the least impact on society and the
environment throughout the full life cycle of the product.

Sustainable procurement also leads to sustainable construction by applying principles that
provide ways of building that reduces the use of virgin material, energy, pollution and waste.

The carbon footprint and sustainability of materials includes the energy needed to extract the
raw material, the energy needed to process the material and any transportation during the
manufacturing process.

Materials with low bodied energy are those that require low levels of energy to produce
them. Many insulation materials are made of petrochemicals or mineral wool that requires
large amounts of energy to process. The carbon footprint of sheep’s wool, recycled paper
and wood fibre etc. is considerably lower.