To limit the probability that the overall thermal transmittance of certain building assemblies will be incorrectly calculated, which could lead to the underestimation of the overall thermal transmittance, which could lead to excessive thermal transfer through the environmental separator, which could lead to excessive use of energy, which could lead to an unacceptable effect on the environment.
To limit the probability that the overall thermal transmittance of certain building assemblies will be unacceptably high, which could lead to excessive thermal transfer through the environmental separator, which could lead to excessive use of energy, which could lead to an unacceptable effect on the environment.