Part L1b Calculations

The Part L1b Calculations document relates to the conservation of fuel and power in existing dwellings that are undergoing significant refurbishment.

This document also covers work to extensions (including conservatories and porches), viagra sales buildings subject to material change of use – or a change in their energy status, the provision of a controlled service or fitting, and the replacement/renovation of a thermal element.

The requirements for achieving compliance with Part L1b are, in many ways, very different to the way SAPs are undertaken; however the same process is used to ensure that compliance with regulations and other requirements are achieved.

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Part L1b Calculations