SAP Energy Ratings for new housing
SAP 2005 is the Government's Standard Assessment Procedure for Energy Rating of Dwellings. SAP 2005 is adopted by government as part of the UK national methodology for calculation of the energy performance of buildings. It is used to demonstrate compliance with building regulations for dwellings - Part L (England and Wales), Section 6 (Scotland) and Part F (Northern Ireland) - and to provide energy ratings for dwellings.
Part L of the current building regulations require that a building's design specification must meet certain criteria. To show Building Regulation compliance, the CO2 emissions figure must be calculated according to this approved method.
The method involves calculating a Target Emission Rate (TER) for a notional building (a building built to minimum current standards) of the same dimensions and comparing it to the actual Dwelling Emission Rate (DER). The calculated DER must be less than the TER. In addition, by calculating the DER an estimate of the hot water and heating cost is also produced.
Building Regulations
The implementation of the new building regulation means that SAP is the only assessment available for new dwellings.
The SAP rating is based on the energy costs associated with space heating, ventilation and lighting, less cost saving from energy generating technologies. It is adjusted for floor area so that it is essentially independent of dwelling size for a given built form.
The SAP is now expressed on a scale of 1 - 100, 1 represents a poor standard of high running cost energy efficiency while a SAP of 100 represents zero energy costs.
The Environmental Impact Rate (EIR) is based on the carbon dioxide (CO2) emissions associated with the space heating, water heating, ventilation and lighting.
Dwelling CO2 Emission Rate (DER) is similar to the EIR, it is equal to the CO2 emissions per M2 of the floor area and the DER is used for the purpose of building regulation compliance.
The calculation is based on the energy balance taking into account a range of factors that contribute to energy efficiency:
- Materials used in construction
- Thermal insulation
- Ventilation equipment
- Heating system efficiency and controls
- Solar gains
- Fuel used for space and water heating, ventilation and lighting
- Renewable energy technologies
Part of our service is providing the U-Value calculations that co-inside with the SAP calculations. We offer advice to ensure compliance with Building Regulations.
Why Terry Holmes Consultants?
We have considerable experience and expertise in producing SAP Energy Ratings. We can accept plans in pdf or CAD format and can provide an immediate quotation.
Our staff would welcome the opportunity of discussing your requirements with you.
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