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LZC
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Part L Second Tier DocumentsThe new edition of Part L makes reference to a number of secondary documents which are issued by DCLG and published by NBS. These are: Low or Zero Carbon Energy Sources: Strategic GuideThis strategic guide provides sufficient information to decide if a particular LZC energy
source is appropriate for the building under consideration and to estimate the potential for
carbon dioxide emissions reduction. The guide comprises an introduction to LZC energy
sources; a set of calculation methods to enable the carbon dioxide emissions reduction
potential of individual LZC energy sources to be calculated in domestic and non-domestic
building applications; and outlines guidance on key issues for certain LZC energy sources
where this is lacking in current literature. Domestic Heating Compliance GuideThis booklet provides guidance on the means of complying with the requirements of Part L
for conventional space heating systems and hot water systems in dwellings. It comprises four
self-contained fuel-based sections, each of which addresses all the requirements applicable
to primary and secondary space heating and hot water technologies for gas-fired, oil-fired,
electric and solid-fuel systems, and five specialist technology-specific sections which
provide further guidance on the minimum provisions for specialised space heating and hot
water technologies (community heating; underfloor heating; heat pumps; solar water heating;
and micro-CHP units). Non Domestic Heating, Cooling and Ventilation Compliance GuideThis booklet provides guidance on the means of complying with the requirements of Part L
for conventional space heating systems, hot water systems, cooling and ventilation systems in
non-domestic buildings. Its sets out the minimum provisions for efficiency of the plant that
generates heat, hot water or cooling; controls to ensure that the system is not generating
heat, hot water or cooling unnecessarily or excessively; other factors affecting the safety
or energy efficiency of the system; insulation of pipes and ducts serving space heating,
hot water and cooling systems; and acceptable specific fan power ratings for fans serving
air distribution systems. National Calculation Methodology for determining the energy performance of buildingsThis guide defines the procedure for calculating the annual energy use for a proposed
building and compares it with the energy use of a comparable ‘notional’ building. The
National Calculation Methodology (NCM) also calculates the rate of carbon emissions from the
building which should not be greater than its Target Emission Rate as described in Approved
Documents L and also calculated by the NCM. |
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