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What Is a SAP Calculation?
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Learn what information feeds into a SAP calculation, how it tests a new home’s energy performance and why assessments happen at design and completion stages.
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What is a SAP calculation? This guide explains how the Standard Assessment Procedure uses a home’s design information to calculate energy and carbon performance against regulatory targets. The assessment considers fabric, heating, ventilation and renewable technologies. It covers the information an assessor needs, why calculations happen at design and completion stages, and how SAP differs from an EPC.
For the current methodology, see the Standard Assessment Procedure guidance on GOV.UK, or explore our guide to Energy Performance Certificates.
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