National Calculation Methodology (NCM) …

National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England*) 2013 Edition November 2015 NCM modelling guide for buildings other than dwellings in England P a g e | 2 Main Changes in the 2013 Edition This NCM modelling guide comes into force on 6 April 2014 in support of the 2013 Edition of the Approved Document L2A: Conservation of fuel and power in new building other than dwellings. The main changes in the technical requirements of software since the issue of the previous NCM modelling guide are as follows: 1. New specifications of the Notional building for the 2013 edition, which are used to determine the carbon dioxide (CO2) target, have been defined to deliver a 9% CO2 savings across the new non-domestic building mix relative to Part L 2010. 2. The side-lit class of zones in the Notional building has been split into those with and without artificial cooling in place in order to widen the set of zones classes based on their access to daylight: unlit, side-lit (heated only), side-lit (heated and cooled), and top-lit.

National Calculation Methodology (NCM) modelling guide (for buildings other than dwellings in England*) 2013 Edition November 2015

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