Car Park CO Monitoring System | Regatta Wharf

Regatta Wharf
  • 4 buildings ranging in height from 7 to 13 storeys
  • 141 apartments
  • 2 commercial lots
  • completed 2000
  • 9 lifts (2 per building & goods lift)
  • 3 car park levels (combined for all buildings)
  • indoor heated pool
  • sauna & spa
  • gymnasium
  • bike room & kayak room
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Regatta Wharf upgraded the car park ventilation system to incorporate carbon monoxide (CO) sensors and variable speed drives (VSDs). An investment of $34,000 is on track to save them over $35,000 p.a.

Why this project?

Regatta Wharf participated in the City of Sydney Council’s Smart Green Apartments program. The energy audit not only identified that HVAC (Heating, Ventilation and Air-Conditioning) - of which the carpark ventilation system is a significant element - accounted for 34% of total common property energy consumption, but that the carpark ventilation system accounted for 24% of total consumption. The auditor recommended the installation of CO sensors and VSDs and determined that the payback period would be around 3 years.


Pie chart of electricity and gas consumption at Regatta Wharf

Findings from the energy audit

Existing system and operation

The car park ventilation system consists of 3 exhaust fans and 1 supply fan. They were controlled by a timer and ran for 6 hours every weekday.


Graph of common property energy demand at Regatta Wharf

Common property energy demand, in half-hourly intervals, for a typical day when the system operated on a timer.

The solution


Variable speed drive in the carpark at Regatta Wharf

Variable speed drive

8 CO sensors were installed to meet the requirement that no point in the carpark can be more than 25m away from a sensor. The supply and exhaust fans were fitted with variable speed drives.

The total cost was $33,763.40 (inc GST).


CO monitoring control unit at Regatta Wharf

CO monitoring control unit


The results exceeded expectations, and the system will pay for itself within a year. Savings in the first year of operation are expected to exceed $35,000.

The following graphs show the impact on electricity consumption following the installation on the 18th & 19th August.

Average daily consumption for the month following installation was approx. 12% less than that preceding the installation.

Last Updated: 
Fri 19/08/2016

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