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4 Parramatta Square 

Owned and managed by Walker corporation, 4 Parramatta Square offers 67,206 sqm of premium office space which is currently occupied by Property New South Wales. It is currently the second-largest building in Australia that has achieved a 6 Star NABERS rating. As part of the Parramatta square complex, it offers a wide range of spaces for retailers to provide their services to the general public.

BPM Outcomes

Energy Savings kWh: 45%
Reduction in Gas: 65%
Reduction in Energy: 40%
Financing: From savings 

Project Summary

4 Parramatta Square is now the second largest building in Australia to achieve a 6-star NABERS rating, all within 18 months of undertaking a Building Performance Maintenance contract with Conservia. With the original goal of achieving 5 stars at the beginning of the project in early 2021, 4 Parramatta Square surpassed its energy-saving results to achieve a 40% reduction in energy consumption.

Our Solution

Rogue VAVs prevent the central plant from running efficiently by providing faulty or a lack of data, the result is wasted energy. Identifying and deselecting the rogue VAVs will save significant fan energy for 4 Parramatta Square. We performed an AHU economy cycle, utilising outdoor dew-points to decide when the outside air is too humid to be used for indoor cooling. We identified and deselected rogue VAVs from overall cooling and heating logic.We applied a wet-bulb control for the cooling towers, this will ensure that when the outside temperature is warm enough, it won’t require excessive indoor heating. We also set the degree control band for all VAVs to half a degree instead of 1 degree, and a pressure reset program for the tenant condenser water system.

The results

As a result of our energy-saving strategies, 4 Parramatta Square is flourishing with a sustainable design. Our solutions are saving the building 40% of electricity consumption and roughly 65% of gas usage a year. As part of our contract, we are continuing to provide ongoing support to ensure all our strategies are running to keep the building increasingly more sustainable.

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