- Author
- Byron Raal, CAS Founder-Editor About the author
- Checked against
- ISO 11011AS 4343
- Date last checked
- 21 August 2026
Compressed air is one of the biggest electricity costs on an Adelaide factory floor, and most sites have never measured it. An audit tells you exactly how much your system burns, where it leaks away, and what each fix is worth in dollars. In South Australia there’s an extra edge to the maths: the state has been recording the highest wholesale electricity prices in the National Electricity Market on the Australian Energy Regulator’s quarterly figures. That is a wholesale-market observation, not your site tariff, but higher South Australian energy costs can strengthen the case for an audit at some sites; the way to value any saving is at your site’s actual marginal electricity cost. CAS connects you with an independent auditor; we don’t run the audit ourselves.
This page covers what a compressed air audit involves in Adelaide, the South Australian support and electricity picture, what the audit itself costs, and how to choose an independent auditor. It is written for plant managers, facilities engineers and operations teams across metropolitan Adelaide, the northern manufacturing corridor, and the food and wine processing regions from the Barossa to McLaren Vale.
This guide covers the Adelaide specifics. For the national method, typical costs and returns, and how to choose an independent auditor anywhere in the country, start with the compressed air audit Australia guide.
Why Adelaide operators audit compressed air
Compressed air is one of the most expensive utilities on an Adelaide factory floor, and one of the least monitored. Generating compressed air costs roughly 6 to 7 kW per cubic metre per minute of free air delivered, and the electricity to run a mid-sized compressor over its life dwarfs its purchase price. In South Australia that electricity bill carries extra weight. The Australian Energy Regulator’s wholesale market statistics for the second quarter of 2026 put South Australia’s quarterly volume weighted average spot price at the top of the National Electricity Market, around $95/MWh against roughly $60/MWh in Victoria at the other end of the range. Wholesale prices aren’t your retail bill and don’t set what your site pays; higher South Australian energy costs can strengthen the audit case at some sites, and the saving that matters is each measure valued at your site’s actual marginal electricity cost.
Why Adelaide operators audit
Four numbers that make the Adelaide audit case
Compressed air is dear to make, South Australian power sits at the top of the NEM, and unaudited systems leak.
To make the air
6 to 7 kWper cubic metre per minute of free air delivered, the cost of generating compressed air
SA wholesale price
$95/MWharound: SA quarterly volume weighted average spot price, AER Q2 2026, against roughly $60/MWh in Victoria
Common leak rate
20 to 30per cent of total compressed air output lost to leaks on systems that have never been audited
One 3 mm leak
7.31 L/sof free air delivery (439 L/min) from a single 3 mm leak at 7 bar
Wholesale prices are not your site tariff: value each measure the audit finds at your site’s actual marginal electricity cost.
Source: AER Q2 2026 wholesale market statistics and the CAS leak cost model.
The demand side is just as local. Barossa and McLaren Vale processing runs on compressed air for filling, bottling, capping and packaging lines. Defence and shipbuilding work at Osborne leans on it for fabrication, blasting, painting and pneumatic tooling. Across the northern Adelaide manufacturing corridor, compressed air drives everything from CNC machinery to conveying and finishing. On systems that have never been audited, leak rates of 20 to 30 per cent of total compressed air output are common. A single 3 mm leak at 7 bar bleeds about 7.31 L/s of free air delivery (439 L/min, modelled as a sharp-edged choked orifice with a discharge coefficient of 0.65, the same convention as our leak cost calculator), which runs into thousands of dollars a year in wasted electricity at typical commercial and industrial rates. An audit turns that invisible waste into a costed action list.
What a compressed air audit covers
A compressed air audit follows a structured methodology, internationally standardised in ISO 11011 Compressed air Energy efficiency Assessment. The auditor measures supply-side performance (compressor power draw, specific power, pressure profile), demand-side consumption (flow at key branches, end uses), and losses (leaks, artificial demand from over-pressurisation, inappropriate uses). For the full seven-step breakdown of what happens during an audit and what the report contains, see the national compressed air energy audit guide. This page focuses on the South Australian funding, pricing and compliance picture.
One South Australian item worth adding to the audit’s walk-around: registration status. Air receivers are pressure vessels, and in South Australia AS 4343:2014 is prescribed under the WHS Regulations for hazard-level assessment, with registration sitting with SafeWork SA. Pressure vessel designs assessed as Hazard Level A, B, C or D require design registration, and individual vessels assessed as A, B or C require plant registration before normal use, with limited exceptions for some serially produced vessels. Confirm the classification from your vessel’s design documentation and with SafeWork SA or a competent pressure-equipment professional. If your receivers have never been checked, our pressure vessel registration SA guide walks through how registration works and who to talk to.
The South Australian funding and electricity picture
South Australia doesn’t currently run a standing, compressed-air-specific grant scheme the way NSW runs a dedicated compressed air pathway under its Energy Savings Scheme. What SA does have is worth knowing about before you commission anything.
Green Industries SA operates the Business Sustainability Program, which offers South Australian businesses free advice, tools and project scoping support for resource and energy efficiency work, including advice on Green Industries SA grant eligibility. At the time of writing, the program’s two grant streams (the Assess-Implement-Monitor grants for businesses and the Lead-Educate-Assist-Promote grants for industry groups) are under review, with the program team taking registrations to be notified when applications reopen. Programs change, so check Green Industries SA directly for what is open before you build a grant into your business case.
Separately, South Australia’s Retailer Energy Productivity Scheme (REPS), administered by the Essential Services Commission of SA, obliges energy retailers to deliver approved energy productivity activities, and businesses can access commercial activities through obliged retailers or registered activity providers. Available activities and eligibility vary by business and premises, and there’s no dedicated compressed air pathway equivalent to the NSW scheme, so treat REPS as something to check with a provider rather than something to count on. One pathway worth raising with a registered activity provider is the broad Commercial and Industrial Demand Savings activity (CD1), which uses measured and verified savings from commercial and industrial equipment upgrades; whether a compressed air project at your site qualifies is a question for the provider, not a given.
The practical conclusion is the same one we give Queensland operators: build the audit’s business case on the electricity it recovers, not on a grant. In South Australia the state’s wholesale prices were again the highest in the NEM on the AER’s Q2 2026 quarterly averages; that is a wholesale observation rather than a site tariff, but higher energy costs can strengthen the case at some sites. The recovered energy is reliable; the grant is not. For the national scheme-by-scheme picture, see the compressed air grants and incentives guide.
What an Adelaide audit costs and what it returns
Audit fees scale with system size and the depth of metering, from a walk-through assessment of a single compressor room to a multi-day data-logged study across a large site. The economics are driven by what the audit uncovers, not by the fee. On a system carrying 20 to 30 per cent leak losses, the recovered electricity can repay the audit fee quickly; the actual payback depends on the savings the audit measures, your site’s actual marginal electricity cost, and the quoted audit and repair costs, and higher South Australian energy costs can strengthen that case at some sites. The audit report should give you a ranked list of measures with the cost, the annual saving, and the payback for each, so you can fund the quick wins from the savings and stage the larger capital items. Model the leak-repair component yourself first with the CAS leak cost calculator to size the opportunity before you commission an auditor.
How to choose a compressed air auditor in Adelaide
Independence is the first test. An auditor who also sells you the compressor has an incentive to recommend new plant over cheaper control and leak fixes, so a credible audit is conducted by someone whose recommendation is not tied to an equipment sale. Ask whether the assessment follows the ISO 11011 methodology, whether the auditor data-logs over a representative period rather than taking a single spot reading, and whether the report quantifies each measure in kWh and dollars rather than offering generic advice. For food and beverage sites in the wine regions, ask about experience with breathing-air and product-contact air quality requirements alongside the energy work, because filling and packaging lines carry air quality duties that a purely energy-focused auditor can miss.
CAS is an information and referral service. We do not conduct audits or sell compressors. Tell us your site location in Adelaide, compressor size, operating conditions and audit objective. We can review your brief and discuss a suitable Australian provider if one is available. We ask for your written permission before an introduction and explain any referral payment arrangement. There is no cost to enquire.
Next step: scope your Adelaide audit
Before you commission anything, gather three numbers: your compressor’s rated power, your typical operating pressure, and your annual run hours. Those three figures give an auditor enough for an initial screening estimate of your annual compressed air electricity cost; what the audit could actually recover only emerges once the system is measured. Then decide whether to start with a leak survey (fast, cheap, high return) or a full ISO 11011 system assessment (deeper, and the stronger foundation if you want to put a Green Industries SA or REPS conversation on solid numbers). Either way, judge the audit on the waste it measures, valued at your site’s actual electricity cost against the quoted fee.
Form not loading? Email us directly at byron@compressedairsolutions.com.au with your enquiry.
Related reading on CAS: the national compressed air energy audit guide, the leak cost calculator, pressure vessel registration in SA, and the grants and incentives guide. Auditing in another city? See compressed air audits in Sydney, Melbourne, Brisbane, and Perth.
Frequently asked questions
Is there South Australian funding for compressed air upgrades in Adelaide?
Not in the form of a standing compressed-air-specific scheme. Green Industries SA’s Business Sustainability Program offers free efficiency advice and project scoping, with its grant streams under review at the time of writing, and the Retailer Energy Productivity Scheme lets businesses access approved energy productivity activities through obliged retailers, with availability varying by business. Check Green Industries SA for current programs, and build the audit’s business case on the electricity it recovers rather than on a grant.
What does a compressed air audit cost in Adelaide?
Fees scale with system size and metering depth, from a single compressor-room walk-through to a multi-day data-logged study. The return is driven by what the audit finds: on a system carrying 20 to 30 per cent leak losses, the recovered electricity can repay the audit fee quickly, with the actual payback depending on the measured savings, your site’s marginal electricity cost, and the quoted audit and repair costs. South Australia’s wholesale prices have been the highest in the NEM on the AER’s Q2 2026 quarterly averages; that is a wholesale-market observation rather than a site tariff, though higher South Australian energy costs can strengthen the case at some sites. Ask for a ranked list of measures with cost, annual saving, and payback for each.
How much can a compressed air audit save an Adelaide factory?
Poorly maintained systems can lose 20 to 30 per cent of compressed-air output through leaks, plus losses from over-pressurisation and poor control. South Australian wholesale electricity prices have been the highest in the National Electricity Market on the AER’s Q2 2026 quarterly averages; that is a wholesale-market observation rather than a site tariff, so value each recovered kilowatt hour at your site’s actual marginal electricity cost. The exact figure depends on your compressor size, pressure, and run hours, which is what the audit measures.
Does CAS perform the audit?
No. CAS publishes compressed air guidance and handles supplier enquiries. We do not conduct audits or sell equipment. Tell us what you need help with. If a suitable Australian provider is available, we can discuss an introduction. We ask for your written permission before sharing your details and explain any referral payment arrangement. There is no cost to enquire.
Do I need to register my air receiver in South Australia?
Some air receivers must be registered in South Australia, where AS 4343:2014 is prescribed under the WHS Regulations for hazard-level assessment. Designs assessed as Hazard Level A, B, C or D require design registration, and individual vessels assessed as A, B or C require plant registration with SafeWork SA before normal use, with limited exceptions for some serially produced vessels. Check your receiver’s design documentation and confirm with SafeWork SA or a competent pressure-equipment professional. An audit visit is a practical moment to check registration status, inspection history, relief valves and drains at the same time as the energy work.