Australian Luxury High-Rise Uses AerosealVicki
When it opened for occupancy in 2008, the Arthur Street luxury office high rise in North Sydney, Australia was designed to get high marks for building performance. Unfortunately, the building had never come close to meeting expectations. Tenants were never happy with the AC, and energy costs were well beyond initial design levels. So when it was time to sell the iconic building, the owners of the building knew they had to resolve the problem.
- Building: Arthur Street Building
- Location: North Sydney, Australia
- Aeroseal Contractor: Clean-Air Australia Pty Ltd.
- Building Performance Consultants: Seed Engineering
- Goal: Reduce energy costs, Improve AC effectiveness
- Before Aeroseal: 427 CFM of leakage
- After Aeroseal: 15 CFM of leakage
- Results: Certified 5-Star rated for building performance; 10% the cost of manual sealing. 18 month estimated ROI
Arthur Street Building in North Sydney, Australia sealed its ductwork with Aeroseal.
Consulting engineers had originally told the owners that without sealing leaks in the ductwork, the building’s state-of-the-art chilled beam system would never operate efficiently. However, the owners were told that manual sealing would cost $3 million and include a year of disruptive work — and so they put off the project until the impending sale required an immediate fix.
It was then that the engineers learned about aeroseal, a new method for sealing ducts that is fast and effective. By sealing from the inside of the duct system, workers can avoid all the usual disruptions that come from the demolition typically required to access and seal ducts. After a highly successful trial project, the aeroseal team at Clean-Air was given the green light to seal the ducts throughout the entire building.
Clean-Air mapped out the project and coordinated efforts to minimize tenant disruption. They had two months to seal the ductwork that served 23 different air handling units – including 20 vertical shafts and hundreds of square feet of horizontal ducts branching to individual offices. Working on weekends only, the Clean-Air team partitioned off the entire duct system into more than fifty individual sections. Each section was aerosealed – the computer controlled sealing system showing results as they were happening.
It took Clean-Air three weekends – a total of about 9 days to effectively seal the entire duct system. The final cost was about 10% of the estimated cost for manual sealing. When finished, the building surpassed all code requirements for top ratings. By eliminating virtually all leakage, the engineers were able, for the first time, to turn down A/C power while increasing the comfort of the entire building. By calculating the cost of conditioning the “lost air” engineers estimated an ROI of less than two years.
“The Aeroseal technology allowed us to seal the entire 23-story duct system in a matter of days, without disrupting the existing tenants. We estimated that a job that was once cost prohibitive would now pay for itself in less than two years. We now recommend Aeroseal to most of our clients. We have yet to find a building that meets today’s standards for duct leaks and, in most cases, Aeroseal is the only sensible, cost-effective means of fixing the problem.” Rob Lord, Managing Director, Seed Engineering