THE BRIEF
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We were instructed to complete House Extension Calculations on this proposed extension in Charlbury
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These consisted of L1B Design and As-Built SAP Calculations
THE PROCESS
- To achieve compliance, the proposed extension must improve the performance of the dwelling
- Our assessors specified a low U-Value Design and the installation of an efficient heating system
THE RESULTs
- SAP RESULTS
≤ 29.41
Notional Dwelling Emission Rate (DER)
≤ 116.04
Notional Dwelling Fabric Energy Efficiency (DFEE)
28.89
Proposed Dwelling Emission Rate (DER)
116.03
Proposed Dwelling Fabric Energy Efficiency (DFEE)
PASS
PASS
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Compliant
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The proposed dwelling is more efficient than the notional dwelling therefore compliant with the Part L Building Regulations
Please refer to our Myth Busters for SAP Calculations here for common misconceptions