News analysis DECs
the number of buildings affected requirements. The results of this
Sizing up the cost
from at least 42,000 to 64,000, but comparison would be reported to Key proposals in the planned
the energy used in these additional the EC every three years, although
recast of the EU directive
buildings would only account for 1.4 member states would be allowed
per cent of the total energy used in the freedom to decide on the specifc • DEC to be displayed in buildings common principles for definition
the public sector. methodology to be applied. The larger than 250 sq m that are of low and zero-carbon (LZC)
DCLG estimates that it EC would then publish a report occupied by a public authority buildings. The definition of LZC to
would cost about £8m and save showing member states’ progress • EPC to be displayed in commercial be determined by member states,
12,400 tonnes of carbon per in reaching cost-optimal levels of buildings larger than 250 sq m that but it must be in accordance with the
year. The government would performance. (a) are frequently visited by public principles set by the commission
prefer to encourage the owners However, DCLG argues that and (b) where an EPC has previously • Requirement to set targets for
of the buildings already affected a single methodology may raise been produced on the sale, rent or increase in LZC buildings, with
problems in terms of subsidiarity, construction of that building separate targets for: new and
and although it feels that the current • The energy performance of existing refurbished dwellings; new and
refurbished commercial buildings;
The UK government
UK approach would at least equal, buildings of any size that undergoes
and probably could exceed, the major renovations to be upgraded and buildings occupied by public
fears that focusing
cost-optimal levels required, “this in order to meet minimum energy authorities
cannot be confirmed until the performance requirements • Member states to aim for
on smaller buildings
methodology has been developed • Minimum energy performance cost-optimal levels of energy
could divert resources
by the commission” – and so it requirements to be set in respect of performance of their buildings using
believes that this proposal requires technical building systems – boilers, a methodology developed by the
and attention from
further, broader consideration. air conditioning units, etc commission
stimulating real
• European Commission to establish Source: DCLG
Zero carbon
carbon cuts.
The third key proposed change in The DCLG says it doesn’t feel • Regularly inspecting heating
the recast is establishing common that setting targets for achieving systems and boilers; and
by DECs to implement the principles for the definition of low zero carbon in existing buildings • EPC report recommendations to
recommendations provided in the and zero-carbon buildings, and is appropriate, and any targets be made more precise and detailed.
accompanying report, fearing that setting targets for achieving these. set for achieving low carbon in The EC is proposing that the
focusing on smaller buildings could The EC proposal would still allow existing buildings should be split recast directive be implemented by
divert resources and attention from member states to set their own appropriately across domestic and 31 December 2010 where proposals
stimulating real carbon cuts. definition of low and zero-carbon, non-domestic properties. affect the public sector, and 31
as long as they complied with A key proposal supported by January 2012 for other buildings.
Methodology Europe’s common principles. the DCLG is for displaying existing But DCLG says it has reservations
The second area in the recast that The EC also intends to publish a EPCs in commercial buildings larger about the timetable, describing it as
DCLG lists as requiring further report showing each member’s than 250 sq m in size that are visited challenging and unrealistic. l
consideration is that of creating a progress in increasing the number frequently by the public. Another is
single methodology to calculate the of buildings achieving low and upgrading the energy efficiency of
CIBSE is seeking members’
energy performance of buildings. zero-carbon status, which may lead an existing building, or its systems,
views on this consultation. To
view the consultation please go
According to the recast, the to recommendations being made when it is undergoing major
to http://www.communities.
methodology would distinguish by the EC. refurbishment works.
gov.uk/publications/
between new and existing buildings, But, according the DCLG Other proposals in the recast that planningandbuilding/
and different building types. consultation document: “The UK are backed by DCLG include:
recastepbdconsultation. The
Member states would be supports the proposal to increase • Minimum energy performance
closing date for the consultation
expected to calculate the “cost- the number of buildings in this requirements for technical building
is 2 October 2009, so please
send comments in by Friday 25
optimal levels” of minimum energy category as a general aspiration. It systems, such as boilers and air
September 2009 to Samantha
performance requirements using does not support the proposal that conditioning units;
McDonough, CIBSE policy
this methodology, and compare targets should be set for an increase • Checking a sample selection of manager, at: smcdonough@
the results of these against their in the number of low and zero- EPCs and air conditioning reports
cibse.org
own minimum energy performance carbon buildings.” for accuracy;
Balanced Ventilation and Heat Recovery Units
with the TT Series Seven Range
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•
Air volumes 25 to 2500 l/s
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THERMAL TECHNOLOGY
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Sales
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Telephone:
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01373
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e-mail: sales@thermaltechnology.co.uk website: www.thermaltechnology.co.uk
www.cibsejournal.com September 2009 CIBSE Journal 15
CIBSEsep09 pp14-15 newsanalysis.indd 15 21/8/09 12:07:17
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