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Part L2 Consultancy

  Computer model of building for Part L2 emissions calculation

 In 2006, Part L2 of the Building Regulations (Conservation of Fuel and Power) changed significantly. In particular, the energy efficiency of buildings can no longer be demonstrated by using an external envelope which conforms to insulation standards (the old 'elemental method'). Instead, the annual CO2 emissions of the building need to calculated and these must be below a target level.

The software that is used to calculate the CO2 emissions must be accredited by the DCLG. To date, accredited software is either the freely available SBEM software developed by BRE or some dynamic thermal simulation software. Flow Analysis have expertise in the use of both SBEM and accredited dynamic thermal simulation software (although dynamic thermal simulation software is preferred in the vast majority of cases).

In addition, for naturally ventilated buildings, it is necessary to prove that the building won't overheat. This requires the use of dynamic thermal simulation software.

Getting buildings to pass Part L2 can be a non-trivial exercise. It requires expertise in passive building design and an understanding of where energy savings can be made. Frequently, daylight simulation expertise is required to prove that lighting energy savings are possible.

Flow Analysis Ltd have all the above capabilities and are available to undertake Part L2 CO2 emissions calculations as part of a new Energy Efficiency Consultancy service aimed around the Part L2 regulation. In summary the service will encompass all or some of the following:

  • Basic advice on building form and passive energy-saving measures.

  • CO2 emissions calculations using DCLG accredited software.

  • The provision of the Part L2 compliance document for Building Control.

  • Advice on how to reduce emissions to meet or go beyond the regulations.

In addition, Flow Analysis Ltd employees have qualified for both the CIBSE Low Carbon Consultants register and the CIBSE Energy Assessors register. Consequently we are now accredited to both sign off PartL2 calculations for Building Control and produce Energy Performance Certificates.

Please use the links below for two Part L2 consultancy examples:

Mixed industrial/office units

Supermaket Extension

example of predicted emissions breakdown

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