THE BRIEFWe were instructed to complete House Extension Calculations on this proposed extension in CharlburyThese consisted of L1B Design and As-Built SAP CalculationsTHE PROCESSTo achieve compliance, the proposed extension must improve the performance of the dwellingOur assessors specified a low U-Value Design and the installation of an efficient heating system THE RESULTsSAP RESULTS≤ 29.41Notional Dwelling
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