- Author
- Byron Raal, CAS Founder-Editor About the author
- Checked against
- ISO 11011
- Date last checked
- 11 August 2026
Compressed air is one of the biggest electricity costs on a Sydney factory floor, and if you’ve never measured it, you’re not alone. An audit tells you exactly how much your system burns, where it leaks away, and what each fix is worth in dollars. In Sydney there’s a bonus: the upgrades an audit finds can pull incentives under the NSW Energy Savings Scheme, which runs a dedicated compressed air pathway. CAS connects you with an independent auditor; we don’t run the audit ourselves.
This page covers what a compressed air audit involves in Sydney, the NSW incentives that can offset the cost of the upgrades it finds, what the audit itself costs, and how to choose an independent auditor. It is written for plant managers, facilities engineers, and operations teams across Sydney and Greater Western Sydney.
This guide covers the Sydney 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 Sydney operators audit compressed air
Compressed air is one of the most expensive utilities on a Sydney 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 at approximately $0.30/kWh based on a typical commercial and industrial tariff for the 2025-26 financial year (actual rates vary by state, retailer, and contract), the electricity to run a mid-sized compressor over its life dwarfs its purchase price. Across Greater Western Sydney’s manufacturing, food processing, and logistics base, a system that has never been audited can be losing 20 to 30 per cent of its output through leaks. 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. An audit turns that invisible waste into a costed action list.
Compressed air audit: Sydney
What an audit is chasing in Sydney
The numbers behind the business case, and the NSW conditions that shape how you price the saving.
per cubic metre per minute of free air delivered: the cost of generating compressed air
per cent of output lost to leaks in a system that has never been audited
of free air delivery bled by a single 3 mm leak at 7 bar (439 L/min)
Planning reference tariff: $0.30/kWh for the 2025-26 financial year (actual rates vary by state, retailer, and contract).
The NSW Energy Savings Scheme runs a dedicated compressed air pathway: the incentive scales with the energy saved.
Incentives are accessed through approved providers accredited under the scheme, which operates under IPART; the audit quantifies the saving the incentive is calculated against.
Method: ISO 11011 Compressed air Energy efficiency Assessment: supply-side performance, demand-side consumption, and losses.
Source: CAS compressed air audit Sydney guide.
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 Sydney-specific funding and sourcing picture.
NSW Energy Savings Scheme: funding the upgrades an audit finds
This is the Sydney advantage. The NSW Energy Savings Scheme compressed air pathway provides financial incentives to make a compressed air system more energy efficient. Eligible measures include setting up or adjusting controls to match compressor output to actual air demand, reducing run hours and idle waste, and installing heat recovery to capture the low-grade waste heat a compressor rejects. The incentive scales with the energy saved: the more electricity an upgrade removes from your annual consumption, the larger the certificate-based incentive. Incentives are accessed through approved providers accredited under the scheme, which operates under the Independent Pricing and Regulatory Tribunal (IPART), and an audit is the natural first step because it quantifies the saving each measure delivers, which is what the incentive is calculated against. Confirm current eligibility and certificate values with an accredited provider, as the scheme parameters are reviewed periodically.
What a Sydney 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, with the actual payback depending on the measured savings, your site’s marginal electricity cost, and the quoted audit and repair costs, before any NSW Energy Savings Scheme incentive is applied to the upgrades. 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 Sydney
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 NSW Energy Savings Scheme work, confirm the provider is accredited under the scheme so the upgrade incentives can actually be claimed.
CAS is an information and referral service. We do not conduct audits or sell compressors. Tell us your site location in Sydney, 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 Sydney 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 let an auditor give you a meaningful first estimate of your annual compressed air electricity cost and the likely recovery. Then decide whether to start with a leak survey (fast, cheap, high return) or a full ISO 11011 system assessment (deeper, feeds the NSW incentive case). Either way, judge the audit on the waste it measures, valued at your site’s actual electricity cost against the quoted fee.
Related reading on CAS: the national compressed air energy audit guide, the leak cost calculator, VSD vs fixed speed compressors, and the compressed air systems hub. Auditing in another city? See compressed air audits in Melbourne, Brisbane, and Perth.
Frequently asked questions
Can I get NSW funding for compressed air upgrades in Sydney?
Yes. The NSW Energy Savings Scheme has a dedicated compressed air pathway that provides incentives for energy-efficient upgrades such as demand-matched controls, reduced run hours, and heat recovery. The incentive scales with the energy saved and is accessed through accredited providers. A compressed air audit is the practical first step because it quantifies the saving each measure delivers, which is what the incentive is calculated against. Confirm current eligibility with an accredited provider.
What does a compressed air audit cost in Sydney?
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, before any NSW Energy Savings Scheme incentive on the upgrades. Ask for a ranked list of measures with cost, annual saving, and payback for each.
How much can a compressed air audit save a Sydney 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. At roughly $0.30/kWh for a typical commercial and industrial tariff, recovering even half of that on a mid-sized compressor runs into thousands of dollars a year. 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.
What should I check before hiring a compressed air auditor in Sydney?
Check that the auditor is independent of any equipment sale, follows the ISO 11011 assessment methodology, data-logs over a representative period rather than taking a single spot reading, and reports each measure in kWh and dollars with a payback. For NSW Energy Savings Scheme upgrades, confirm the provider is accredited under the scheme so the incentives can be claimed.