Going Green and Green in future
(BER) Building Energy Rating
EU (European Union) & North American countries
already implemented soon coming to UAE and Gulf region.
What is a U Value ?
A U value is a measure of heat transfer through a given building materials.
The lower the U value the more energy efficient the material and the more slowly the heat is
transferred in and out of building. It is expressed by the unit W/m2 K (BTU/h.ft2 oF).
Lower U values can be achieved using various different wall thicknesses.
Technical Guidance Document Part L (Conservation of Fuel and Energy) of the Building Regulations 2007 requires a U value of 0.27 W/m2 K.
What is a Building Energy Rating (BER) ?
A BER is an energy rating label. The label has a scale A to G with an A Rated the most energy efficient and G Rated the least efficient.
The Energy Performance of Buildings Directive (EPBD)
The EU Directive on Energy Performance of Buildings (Directive 2002/91/EC of 16 December 2002)
came into force in member states in January 2006 so that the EU could ensure new buildings would
use less energy. The occupancy and use of the 160 million buildings in the EU account for 40% of its
energy consumption and as such are the largest single source of the region’s CO2 emissions. At this
stage, however, this Directive applies only to buildings with a total surface exceeding 1000 m2.
The requirements of the EPBD
The Directive contains a number of different regulations and tools on energy performance that impact
on the design and operation of buildings. In this publication, the focus is on the potential contribution
of concrete to the aims of the EPBD, so not all aspects of the Directive will be covered in detail here.
However, in essence, the EPBD requires that governments, designers and clients take action by:
1. Providing a common framework for a methodology of calculation of the integrated energy
performance of buildings.
2. Placing minimum requirements on the energy performance of buildings, including that required for
3. Requiring that measured energy use is checked in completed buildings and that they are compliant.
4. Allowing a CO2 indicator to be included in the assessment of energy performance, which promotes
the use of alternative energy sources (such as solar panels).
5. Stating that passive heating and cooling concepts should be employed.
6. Stating that good energy performance must not conflict with the quality of the indoor
7. Imposing a system of energy certification of buildings, which increases awareness of the issue
and improves the market value of energy efficiency .
The EPBD provides a common framework for calculating the energy
performance of buildings across Europe and sets minimum
standards in new refurbished buildings.