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  5. Specifics of the Bbio coefficient calculation

Article | REF: C8110 V1

The calculation method for the 2012 Thermal Regulations - General points

Authors: Bruno SLAMA, Stéphane ROBIN

Publication date: August 10, 2015

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5. Specifics of the Bbio coefficient calculation

5.1 Definition and formula

The Bbio coefficient characterizes a building's energy efficiency. It is used to assess the building's energy efficiency in relation to heating, cooling and future consumption of artificial lighting, using the formula :

Bbio=2×Bch+2×Bfr+5×Becl

It depends on the following factors:

  • the architectural design of the building (layout, shape, area and orientation...

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Specifics of the Bbio coefficient calculation
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