New Building Regulations – SANS 10400-XA

New Building Regulations – SANS 10400-XA

Dec 9, 2011

‘These Building Regulations have come into effect on the 10th November 2011 and stipulates requirements for energy efficiency in new buildings and renovations that requires plans.’


Hot water supply requirements SANS 10400-XA


  • A minimum of 50% of the annual average heating requirement for hot water must be provided by means other than electric resistance heating (Geyser) or fossil fuels
    • See options below but not only limited to these:
      • Solar heating
      • Heat pumps
      • Geothermal heat
      • Renewable combustible fuel
      • Heat recovery from alternative systems and processes


  • The functional requirements of sub-regulation XA2 shall be satisfied when:
    • 4.1.1  The population for which such building is designed is  determined in accordance with Regulation A21;
    • 4.1.2  The hot water demand is determined in accordance with table 2 and table 5 of SANS 10252-1:2004;
    • 4.1.3  The storage requirement is based on maintenance of a hot water  temperature of 60 0C;
    • 4.1.4  Solar water heating systems shall comply with SANS 1307, SANS 10106 and SANS 10254 based on the thermal performance determined in accordance with the requirements of SANS 6211-1 and SANS 6211-2.
    • 4.1.5  All exposed hot water service pipes (SANS 10252-1) shall be clad with insulation with a minimum R-value in accordance with SANS 204.
    • 4.1.6 Thermal insulation, if any, shall be installed in accordance with the manufacturer’s instructions.

All exposed hot water pipes with a 80 mm diameter

  • Must be insulated with a minimum R-value of 1.00

All exposed hot water pipes with a diameter greater than 80 mm diameter

  • Must be insulated with a minimum R-value of 1.50

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