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This new factory will be compliant with many of the requirements now in force under the SANS 10400 Part XA and SANS 204, i.t.o. the National Energy Act that came into effect on 09 Nov 2011. “GREEN” ROOFS MBH Architects, have opted for Green Roofs over the office components of a proposed new factory development in Lanseria Corpo-rate Estate, just outside Johannesburg, South Africa. Green roofs, will aid by better insulating the roof slab, thereby effectively reducing energy consumption, specifically pertaining to HVAC equipment, and especially during the summer months. It will also aid in reducing the Urban Heat Island (UHI) factor, as the lawn and foliage on the roof slabs, will absorb solar radiation, as opposed to re- radiating it into the immediate surrounding environment and will so doing reduce the ambient air temperature around the site substantially during summer. GREY WATER HARVESTING As the estate incorporates a grey water attenuation pond, permeable pavers, will be used to aid with absorbing and draining rain water into perforated pipes inside a sump underneath the parkades, which will filter via a grey water connection into the estate's grey water reticulation system and into the atten- uation pond, to be utilised for irrigation and reflushing of toilets, amongst other uses. Micro Grey Water storage tanks will also be provided for each bathroom, to be utilised for multiple toilet flushing, which will alleviate the demands on potable water resources. GEO-THERMAL HEAT PUMPS The HVAC system will be connected to an underground piped storage network, which will aid with conserving / regulating the temperature of water to be used in the space cooling and heating system. HOT WATER SUPPLY 50% of the hot water supply in this factory, will be provided by means of renewable sources and this instance, mainly solar water heating. All hot water systems will additionally be pumped closed loop systems of which all piping will be lagged, to reduce heat loss.
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