SA Affordable Housing March / April 2018 // Issue: 69 - Page 23

FEATURES The Belhar project showing the heat pump installation on the roof of each building. Council of South Africa (GBSA) is the go-to source for EDGE certification and can help you to certify your project and quickly increase its marketability. GBSA is leading the transformation of the South African property industry to ensure that buildings are designed, built and operated in an environmentally sustainable way. GBCSA is the exclusive provider of EDGE certification in South Africa. “Improving energy efficiency in the affordable housing market has several energy and environmental benefits. For example, it contributes to a reduction in greenhouse gas (GHG) emissions, helps reduce energy costs for the building’s occupants, improves indoor air quality, increases living comfort and can add to the overall value of a property,” says Mark Gillott, business development director at Knauf Insulation (UK). Taking this into account, we consider some of the major components that play a role in efficiency in the affordable housing market. They include things such as water heating solutions, water conservation, lighting, insulation and alternative energy sources. This not only ties into the strategy of the National Development Plan (NDP), it also holds value for the developer as well as uplifting the user by offering transferred savings of consumption. A FORETHOUGHT OR AN AFTERTHOUGHT? “It is of course advisable to plan ahead and design a comprehensive, whole-unit approach to energy efficiency, and while it’s easier to install insulation as an example during the build phase, there are many methods to retrofit to existing or older buildings to improve energy efficiency, save money on energy costs and enhance acoustic benefits,” says Gillott, which is the afterthought. SANS 10400-XA: the application of the national building regulations — XA2: Energy usage in buildings –stipulates that at least 50% of volume of the annual average hot water heating requirement shall be provided by means other than electrical resistance heating including, but not limited to, solar heating, heat pumps and heat recovery from other systems or processes. According to Christie Schröder, managing director of Heinlo Heating and Cooling Solutions, “As a forethought we have seen an increase in the number of developers or clients proactively incorporating energy and water efficient systems into their developments as from the planning phase, driven by the advantages for the owner and consumer.” This allows for the best system to be designed for a specific project, and client requirements can be met. “As an afterthought we have also installed, for example, many alternative energy retrofit hot water installations with great success, but this definitely has design and cost implications,” Schröder adds. MULTI-STOREY PROJECTS AND STAND-ALONE UNITS Multi-story projects allow for the use of bulk centralised systems (heat pumps, solar and so on) which have financial AFFORDABLE SA HOUSING MARCH - APRIL 2018 21