The heat loss due to linear thermal bridging (

H_

) is a physical quantity used when calculating the energy performance of buildings. It appears in both

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

and Irish methodologies.

Calculation

The calculation of the heat loss due to linear thermal bridging is relatively simple, given by the formula below: :

H_ = y \sum A_

In the formula,

y = 0.08

if Accredited Construction details used, and

y = 0.15

otherwise, and

\sum A_

is the sum of all the exposed areas of the

building envelope A building envelope or building enclosure is the physical separator between the conditioned and unconditioned environment of a building, including the resistance to air, water, heat, light, and noiseSyed, Asif. ''Advanced building technologies for ...

References

Energy economics Thermodynamic properties {{thermodynamics-stub