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    New Building Regulations

    24 Mar 2014 | 2014, Building Regulations, Part L, SAP Calculations, SBEM Calculations

    Building Regulations Part L 2013

    Building Regulations are changing with the latest 2013 version coming into force on 6 April 2014. Meeting CO2 emissions targets will become tougher and these amendments will apply to both domestic and non-domestic new buildings.

    The key points: –

    • Domestic dwellings will be subject to a 6% reduction in emissions rates compared to the 2010 levels.
    • Across the range of non-domestic buildings, there will be a 9% aggregate reduction in emissions rates compared to the 2010 levels.
    • Regulation 25A requires consideration of high efficiency alternative systems when constructing new buildings.

    Domestic Buildings Part L1A 2013 (SAP Calculations)

    The procedures for compliance will remain the same in the fact that the proposed building must not exceed the Target Emissions Rate (TER). However there is now also the addition of a Target Fabric Efficiency Rate (TFEE).

    The Fabric Energy Efficiency (FEE) is used in Code for Sustainable Homes assessments and is a rating of the combination of thermal element u-values, thermal bridging, air tightness, solar gains and thermal mass. New buildings must now comply with a Target Fabric Efficiency Rate, which reiterates the ‘fabric first’ view that the regulations are trying to encourage.

    In the current and previous regulations, for buildings adopting a limiting (worst case) thermal fabric approach, it was possible to use an air source heat pump as the main heating system to ensure compliance and overcome the poorer fabric. In the latest regulations, there will also be a 5.44% increase in the electricity fuel factor; this, combined with the introduction of the TFEE will effectively mean that a ‘standard’ build with a heat pump may not be so easily compliant.

    Solar PV for New Dwellings

    Input data remains the same for new build dwellings however, the output data is now taken from SAP 2012 Appendix U regional solar radiation data. For those in the South West, that will be more beneficial.

    SBEM Calculations for a school

    Non-Domestic Buildings Part L2A 2013 (SBEM Calculations)

    Again, the overall compliance process has not changed whereby the Building Emissions Rate (BER) must match or beat the Target Emissions Rate (TER). As with the last Building Regulations update, offices will bear the brunt of the CO2 reduction at around 12% – 13%. Warehouses will be at the other end of the scale at around a 3% – 4% reduction in target emissions. There has also been some revisions to building services including an increase in the minimum efficiency for boilers and some hot water systems.

    Consideration of High Efficiency Alternative Systems

    The new Regulation 25A will be included which requires consideration of high efficiency alternative systems when constructing new buildings. There should be an analysis of the technical, environmental and economic feasibility of using systems such as: –

    • Cogeneration (CHP)
    • District heating / cooling – especially where renewable sources are to be used
    • Heat pumps
    • Decentralised supply systems based on renewable energy sources

    We are based in Exeter and typically cover Devon, Cornwall and Somerset for site inspections but for new buildings, we can help wherever you are in the country. We are here to help with your SBEM Calculations, SAP Calculations and EPC compliance or to answer any questions on the new Building Regulations Part L, so please get in touch.

    Filed Under: 2014, Building Regulations, Part L, SAP Calculations, SBEM Calculations
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