BSRIA Announces Building Regulation Modifications

March 28, 2006

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Part L revisions include:

Predicted CO2 emissions from new buildings must be 20% to 28% less than emissions allowed for new buildings built under current regulations.
A sampling of new dwellings in each development, and all non-dwellings, will be required to undergo airtightness testing. Test results will be figured into the CO2 emission calculation.
When large non-domestic buildings are extended, consequential improvements to the existing building's energy performance will be required.

Part F revisions include:

Equivalent area, not free area, will be used to assess the performance of background ventilators.
Trickle vents or other methods of background ventilation provision will be required for replacement windows.
Minimum fresh air supply rate increased from eight to 10 litres per second per person.

Alternative prescriptive and performance-based methods of illustrating compliance are available.

Source: Building Services Research and Information Association (BSRIA).

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