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Sub-metering electricity consumption |
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Sub-metering on HVAC systems, parking, tenant and common areas. 94 to 97% of electricity is accounted for |
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Sub-metering on HVAC systems, tenant and common areas. UAS to verify what percentage of incoming feed is accounted for |
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Sub-metering on HVAC systems, parking, tenant and common areas |
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Sub-metering on HVAC systems, parking, tenant and common areas |
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Sub-meters are used to monitor consumption on HVAC systems and for tenants |
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Consumption by all retail tenants is sub-metered. Common areas (including parking) are not metered |
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Sub-metering will be installed for the HVAC systems, parking, tenant and common areas |
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Repaired reticulation faults and replaced faulty tenant meters |
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Sub-metering occurs for tenants and common areas |
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Sub-metering on parking, tenant and common areas. UAS assist with monitoring of meters / performance |
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Modify thermostat set-points and supply temperature for chiller water |
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The set-point has been increased by 1.5 degrees. All heating capacity to HVAC units has been de-commissioned. Chiller start-up has been adjusted to respond to seasons |
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Options to be investigated related to dropping set-point |
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Options to be investigated related to dropping set-point |
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All heater banks have been disconnected. Set-point to be raised by 1 degree |
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Set-points were adjusted by 1 degree. Common areas are not air-conditioned |
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Set-points in common areas will be set to reduce consumption and costs |
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Individual tenant control |
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Variable speed drives |
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Drives have been installed on all chiller pumps and air-handling unit fan drives. Drives are regularly checked and maintained |
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Not installed. Options to be investigated |
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Variable speed drives fitted on chilled water pumps and AHU fans |
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Drives have been installed on the recently added portion of the mall |
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Drives are not used. Options to be investigated |
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Options to be investigated related to HVAC plant replacement including variable speed drives |
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All new equipment will incorporate variable speed-drives |
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Not applicable to package units |
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Not applicable to package units. Drive only exists on the borehole pump |
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Tenants manage their own HVAC units |
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LED lighting and occupancy sensors (including external lighting) |
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Replacement as per the Eskom rebate program to commence |
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All parking areas and common area passages have occupancy sensors. LED lighting is being phased in. Neon lighting to be replaced with cold-cathode |
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To be investigated. |
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Replacement as per the Eskom rebate program to commence |
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LED lighting is used in the management offices. Options related to ESKOM rebate programme for the malls and parking areas to be explored. The phase 2 basement makes use of occupancy sensors |
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Replacement as per the Eskom rebate program to commence in parking areas (T8 to T5 conversion) |
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LED lighting and best practises related to energy efficient lighting will be adopted |
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Awaiting cost estimate to convert from TA to T5 in under-cover parking areas |
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Replacement as per the Eskom rebate program to commence in parking and mall areas |
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Replacement as per the Eskom rebate program to commence (T8 to T5 conversion in parking areas and public walkways) |
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Repair duct-work leakage |
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Undertaken as part of on-going maintenance (pressure reading taken and leaks identified and repaired) |
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Undertaken as part of on-going maintenance (pressure readings are periodically undertaken) |
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Undertaken as part of on-going maintenance. |
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Undertaken as part of on-going maintenance (pressure reading taken occasionally) |
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A survey was conducted in June - minor repairs have been effected to ducting |
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Repaired on an ad-hoc basis |
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New ducting will be installed through-out |
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On-going |
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To be undertaken |
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Implement preventative maintenance programs |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Service contracts exist for HVAC, power factor correction, HT-LT |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Concluded a maintenance programme with Ampair. On-site operations staff manage balance of maintenance |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Forms part of the annual service maintenance plan (plant and equipment) |
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Solar hot-water heating |
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All geysers in public toilets turned-off. Hot water in family toilets and mother feeding rooms only |
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No systems currently. Only cold water in all public bathrooms, feeding rooms and family rooms |
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All bathrooms only have cold water. |
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Only cold water used in public bathrooms and family rooms |
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Only cold water is used in public ablutions, family rooms and feeding rooms |
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Hot water removed from office bathrooms and to be removed from mall public toilets in 2013 up-grade |
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Only cold water will be used in public ablutions. Hot water to be used in family rooms and feeding rooms |
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No hot water in bathrooms |
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No solar heating. Hot water is supplied to all bathrooms including family rooms. Opportunity exists to disconnect the hot water supply |
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Hot water in family toilets. No solar water heating on site |
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Peak energy demand reduction |
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Demand is currently lower than in 2006. Various initiatives have been implemented to monitor and control maximum demand |
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Noted as per building management system |
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AC switching times adjusted to make use of cool ambient air |
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HVAC system is managed using timers (system starts before significant heat-gain) |
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The building management system assists with staggering the start of the air-handling units to reduce peak consumption |
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Options to be explored |
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Has been achieved as a result of power factor correction |
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Peak energy consumption will be reduced as a result of the new HVAC system being installed as part of the redevelopment |
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Centre management / UAS manage anchor tenant consumption at peak times |
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Power factor correction |
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Units have been installed for all major tenants and on 11-kV incoming supply to the property |
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All sub-stations have power-factor correction equipment. All sub-stations are operating at unitary power factor of 1 (optimal) |
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Units have been installed on all boards and are serviced under contract. PF 0,99 |
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Has been installed at all LT rooms (to monitor incoming feed). Maximum efficiency (0.99) has been achieved |
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Units are serviced every 6-months. A factor of 0.99 is being achieved (maximum efficiency) |
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All distribution boards have units installed (serviced every 6-months) |
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Power-factor correction units will be installed (units are currently installed) |
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Power factor has been serviced and repaired |
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A proposal will be submitted for a power factor unit for North (South already has units) |
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Power factor management forms part of a maintenance contract |
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Light-coloured surfaces |
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As noted above |
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"Snow-coat" applied to phase 2 roofs |
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As noted above |
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The building facades are painted using light colours |
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Light coloured surfaces have been selected as part of the new paint colour palette (re-painting scheduled for 2013) |
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Strip centre - no enclosed malls |
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Re-painting of the building will be done using light colours (scheduled for 2013) |
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Roofs are light beige |
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Building management systems |
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Building management system on HVAC system is fully operational |
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Building management system is used for control of HVAC system - assists with achieving set-points and controlling maximum demand |
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Building management system used for AC system only. |
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Building management system is not used |
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Building management system is used and is 95% operational |
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Building management system is not used |
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No building management system to be installed - integrated control system on the HVAC will assist with control. Economy dampers for fresh air allow free cooling when external temperatures allow |
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Building management system is not used |
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Ductwork and pipe work insulation |
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All pipework and ducts are insulated. Damage assessed on an annual basis |
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Chiller pipework is insulated. HVAC ducting to be checked for insulation |
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All pipework and ducts are insulated. Damage assessed on an annual basis |
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All ductwork is insulated. Pipework (only cold) is not insulated. Chiller pipework is insulated |
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No maintenance is required, the system is fully operational |
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New duct-work is insulated (no chiller therefore no pipework is insulated) |
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New chilled water piping will be insulated |
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Systems check was undertaken in September and system found to be fully functional |
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Architectural shading and external planting |
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Shading devices applied to PODS |
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No further measures taken |
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No additional systems adopted |
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External planting was up-graded in 2010 to include mature trees that were re-located from a nearby construction site |
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Limited use of architectural shading devices will provide shading to east facades. Atriums and skylights are being specified to reduce glare and 65% solar radiation |
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External walkway assist with shading |
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Photo-voltaic (generating electricity using solar energy) |
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Pilot project being undertaken |
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Options to be explored |
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Building insulation |
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Pods have been double-glazed. Roof-sheeting is light coloured, |
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Skylights are used to inject natural light into the malls |
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See comment below (point-15) |
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Roof-sheeting to the new portion of the mall is white |
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Double-glazing applied to new skylights in 2010 mall up-grade |
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Sheeted roof over building has been specified to be "Zinkalume" |
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Received a quote to repaint the sheeted roofs, await tests from paint supplier to assess if an Eskom rebate is applicable |
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Other |
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Flooding the building with 14 |
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Skylights are used to inject natural light into the malls |
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Skylights are used to inject natural light into the malls |
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All fluorescent ballasts have been replaced with electronic ballasts |
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Bay windows and skylights are used to inject natural light into the malls |
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Clay tiles are used to insulate concrete slabs |
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R407 / 410A refrigerant to be used in HVAC system. Skylights will be used to inject natural light into the malls |
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