Clients are required by law in South Africa to make their new buildings compliant in terms of Energy Usage and in terms of Regulation XA of the National Building Regulations. Some clients will want to make their buildings energy efficient in order to save energy and money. A Rational Design to SANS 10400-XA will achieve this.
Generally if the compliancy exercise is handled by the Architect they will follow a route in SANS 10400-XA known as the Prescriptive or Deemed-to-satisfy route. This route is more expensive to implement than the alternative route which is the Rational Design route. This is because the Prescriptive rules are generally more stringent. The Rational Design route carefully balances costs against energy savings, and clients will no spend extra money on excessive specifications.
A Rational Design is a creature of statute. Only when a client appoints a so called Competent Person to provide a solution for a building which is an alternative solution to the Prescriptive or Deemed-to-satisfy solution is a Rational Design being performed. Rational Designs for Energy Usage are only being performed when the so called Competent Person (a Professional Person sanctioned also by the Building Control Officer of the Local Authority) is using Agrement SA approved software package to perform an energy modelling of the building under consideration.
The Rational Design process should follow SANS 10400-XA very strictly and should use the methodology set out in draft SATS 1705: A modelling and simulation protocol for Rational Design and assessments of energy usage in buildings in terms of SANS 10400-XA
Clients who want to save money:
For clients wanting the lowest cost of build, a SANS 10400-XA Rational Design report can be prepared for the Local Authority which will change the need for expensive glass windows and doors by using an Energy Model.
In the Rational Design submission the building will not have the fenestration and insulation specifications, but it may have a more efficient hot water system or some other measure in place which makes the building nominally more efficient and still in compliance with SANS 10400-XA
Clients who want to save energy:
For clients who wish to save energy and reduce the running costs of their buildings the Rational Design service is expanded to require of an Energy Consultant or a suitably experienced Engineer that the specification developed is optimised so that the client is getting value or energy savings out of compliance SANS 10400-XA and with the National Building Regulations.
The Rational Design service which STRUCTATHERM Projects offer, is to optimize the extra expenditure on energy efficiency and guide the clients towards adopting those measures which are cost effective.
Much of the Energy consumed in South African homes is applied to the heating of hot water.
Get a helping hand from SP Energy when you are designing or retrofitting your home. We have guided many home-owners towards substantial energy savings.
SP Energy will supplement your data with some actual measurement to guide good decision making on energy savings devices and systems. By “measuring we can manage” Energy meters in buildings and industrial facilities give us valuable information.
SP Energy will provide energy audits to analyse where energy is being wasted. SP Energy will guide you or your management towards lower energy usage. This is often in terms of an Energy Management System.
Our SANS 10400-XA training seminars have been running routinely over the past 5 years, training over 3000 professonals. Through our Structatherm Projects division, many professionals have learned how to implement the
SANS 10400-XA standard in satisfaction and compliance with regulations.
The Energy Efficiency Handbook on the implementation of these regulations has been sold to thousands of building professionals and many who have been on our training courses. It is now recognised as an authority on the subject of SANS 10400-XA and its supporting standards.
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