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44 Market St - Refurbishment of a Dual Duct Building
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Date
2013
Authors
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Journal ISSN
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Publisher
Energy Systems Laboratory (http://esl.tamu.edu)
Texas A&M University (http://www.tamu.edu)
Texas A&M University (http://www.tamu.edu)
Abstract
44 Market St is a high profile, A-grade, 27-storey, 28,000m2 office building constructed in the 1970s. In
common with many other buildings of its era, it was equipped with a dual duct air-conditioning system, and its
highest NABERS Rating at full occupancy was 2 stars without Green Power.
This paper describes the process of refurbishing the building including:
Modifications to convert the air conditioning system to a variable volume dual duct system, re-using
many of the components of the original system. BMS replacement including control modifications throughout the system. Separation of domestic hot water from the space heating boilers. NABERS compliance modifications to the building.
The refurbishment works were completed in April 2012, and since then the monthly electricity consumption has
halved and gas consumption reduced by 40% relative to weather corrected benchmarks. Using an average tariff
of 24.8c/kWh for electricity and 1.75c/MJ for gas, that equates to a $340,000 annual cost saving. A 4.5 Star
NABERS rating was awarded to the building in January 2013.