The new legislation on energy efficiency for all new buildings (SANS 10400-XA) has been published by the NRCS. All new buildings that have been built from the said time of the legislation (sans 10400-xa) published will have to comply with the parameters.

Therefore meaning:

All new buildings have to have insulation installed and a stipulated R-value needs to be achieved. When the requirements of SANS 10400-XA are correctly applied, energy efficiency must be reached in one of the following ways:

  • Shading or insulating the building fabric properly
  • Heat flow control through the building
  • Air leakage needs to be controlled through the building fabric
  • Air movement for cooling needs to be created for cooling
  • Cooling and heating of water systems need to be improved

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Below is the climate zones that South Africa has been divided into, according to humidity in the area and temperature variations (SANS 10400-XA):

 

The different Climatic Zones have different R-value requirements. These R-values need to be applied in walls and ceilings. If the appropriate thickness of aerolite or isotherm is installed in your home, your home will be protected against heat and cold, and save energy consumption. This will provide you with a healthy, more comfortable, safe and quiet space for your family to live.

sans-10400-xa-climatic-regions-graph

Detailed Climatic Zone locations in South Africa (SANS 10400-xa)

 

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2

1

2

1

2

Location

Zone

Location

Zone

Location

Zone

AlexanderBay

4

Jacobsdal

6

Pretoria

2

Aliwal North

1

Jan Kempdorp

1

Prieska

6

Amsterdam

2

Johannesburg

1

Pudimoe

1

Baberton

2

Kammieskroon

4

Queenstown

2

Badplaas

2

Kainoplaagte

6

Reivilo

2

Barrydale

4

Kimberley

6

RichardsBay

5

Beaufort West

2

Kingwilliamstown

5

Richmond

2

Bloemfontein

1

Kirkwood

4

Riversdale

4

Boshoff

2

Klerksdorp

1

Rooibokkraal

3

Brakpan

1

Kokstad

2

Sabie

3

Brandfort

2

Komatipoort

3

Sakrivier

6

Butterworth

5

Kroonstad

1

SaldanhaBay

4

Calvinia

2

KrugerNational Park

3

Sibasa

3

Cape Agulhas

4

Krugersdorp

1

Soweto

1

Cape of Good Hope

4

Kubus

4

Springs

1

Cape Town

4

Kuruman

2

St Lucia

5

Cederberg

4

Ladysmith

2

Standerton

1

Centurion

2

Laingsburg

1

Stellenbosch

4

Ceres

2

Makhado

3

Steytlerville

2

Colesburg

1

Marken

3

Stoffberg

2

Conway

1

Melmoth

5

Stutterheim

2

Cradock

2

Mica

3

Swartberg

1

Dealsville

1

Middelburg

1

Swellendam

4

Delmas

1

Midrand

1

Thabazimbi

3

Dendron

2

Mkuze

5

Toska

6

Derdepoort

2

Mmabatho

2

Touwsrivier

2

Dordrecht

1

Mosselbay

4

Uitenhage

4

Drakensberg

1

Musina

3

Ulundi

5

Dullstroom

1

Nelspruit

3

Umtata

5

Dundee

2

Newcastle

1

Upington

6

Durban

5

Niewoudtville

4

Utrecht

2

East London

5

Northam

2

Ventersdorp

2

Elliot

1

Olifantshoek

6

Vereeninging

1

Ermelo

1

Ottosdal

2

Victoria West

1

Estcourt

2

Oudshoorn

2

Vioolsdrif

2

George

4

Petrusburg

1

Virginia

1

Gouda

4

Phalaborwa

3

Volksrust

1

Grahamstown

4

Piet Plessis

2

Vryburg

2

Graskop

3

Piet Retief

2

Warrinton

2

Gravelot

2

Pietermaritzburg

5

Watervalboven

1

Guyani

2

Pilgrims Rest

2

Welkom

1

Harrismith

1

Pofadder

6

Wellington

4

Hartbeesfontein

1

Polokwane

2

Williston

1

Heidelberg

4

Pongola

2

Witbank

1

Hopetown

1

Port Elizabeth

4

Worcester

2

Hotazel

2

Port Nolloth

4

Zeerust

2

Hutchinson

1

Port St Johns

5