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On 9 September 2011, the Minister of Trade and Industry, Dr Rob Davies, amended the National Building Regulations and Building Standards Act (Act 103 of 1977), to introduce requirements for energy usage in buildings. This will come into effect within two (2) months from the date of the publication of the notice, i.e. 9 November 2011.

SANS 10400-XA:2011
In accordance with SANS 10400 Part XA: Energy usage in buildings, one of the aspects to be considered in the building envelope requirements is fenestration.

The requirements for fenestration are as follows:

1. Buildings with up to 15 % fenestration area to nett floor area per storey comply with the minimum energy performance requirements.

2. Buildings with a fenestration area to nett floor area per storey that exceeds 15 % shall comply with the requirements for fenestration in accordance with SANS 204.

3. All fenestration air infiltration shall be in accordance with SANS 613.
The Standards can be purchased on line from

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