What to Expect from a Compressed Air Energy Audit

Compressed air is often referred to as the fourth utility, yet it remains one of the least understood areas of energy consumption in most industrial and manufacturing facilities. A typical compressed air system converts only 8–10% of its input electrical energy into usable air, with the remainder lost as heat. In many sites, compressed air can account for 20–30% of total electricity costs.

An energy audit is the starting point for understanding where that energy is going, where it is being wasted, and what can be done about it. If you are considering an audit but are not sure what the process involves, here is a straightforward breakdown of what to expect when working with us.

Step 1: Initial Discussion

Before any equipment is installed, we start with a conversation. We need to understand your site, your compressed air system, and what you are trying to achieve. This might be a general health check, a response to rising energy costs, or part of a wider energy reduction or ESOS compliance programme. We will ask about the number and type of compressors on site, operating hours, known issues, and any previous work that has been carried out. This helps us plan the audit and make sure we are capturing the right data from day one.

Step 2: Data Logging Installation

This is the core of what we do. We install non-invasive data logging equipment directly onto your compressors, along with pressure transducers fitted to the pipework as a minimum. Depending on the system and what access allows, we may also install dew point sensors, temperature probes, air quality monitoring, and flow meters.

The key point here is that none of this interrupts your production. The equipment is fitted around your existing operations, and in most cases, your team will barely notice it is there.

Step 3: One Week of Data Collection

We leave the logging equipment in place for a minimum of one week. This gives us a representative picture of how your compressed air system performs across a full operational cycle, capturing variations in demand, pressure fluctuations, compressor loading patterns, and any anomalies that might not show up during a short site visit.

A week of real data is worth more than any theoretical calculation. It tells us exactly what your system is doing, not what it should be doing on paper.

Step 4: Data Retrieval and Analysis

Once the logging period is complete, we retrieve the equipment and take the data away for analysis. This is where the real value sits. We use the data to calculate your annual energy consumption related to compressed air, identify inefficiencies in how the system is running, and quantify where savings can be made.

This might include compressors running at part load when they could be sequenced more efficiently, pressure set points that are higher than necessary, leaks in the distribution network, or air treatment equipment that is no longer performing as it should.

Step 5: Presentation and Recommendations

The final deliverable is a detailed presentation covering everything we have found. This includes a clear picture of current system performance, identified inefficiencies, quantified potential annual energy savings, and specific recommendations, each with a projected return on investment.

We do not just hand over a report and leave. We walk you through the findings, explain what each recommendation involves, and help you prioritise based on impact and budget. Where follow-up work is needed, whether that is leak detection and repair, compressor upgrades, control system improvements, or pipework modifications, we can support with that too.

What Makes This Different

Every recommendation we make is backed by real operational data from your site. We are not estimating, guessing, or applying generic benchmarks. The data logging approach means the savings we present are specific to your facility and your operating patterns, which makes it far easier to build a business case internally and measure results after implementation.

Is It Worth It?

In our experience, most compressed air systems have significant room for improvement. The savings identified in an audit typically deliver a return on investment well within the first year, and in many cases, the payback is measured in months rather than years. For sites where compressed air is a major energy consumer, the question is less about whether an audit is worth it and more about how long you can afford to leave those inefficiencies running.

Get in Touch

If you would like to find out what an audit could uncover on your site, we are happy to have a no-obligation conversation. Get in touch and we can talk through your setup and whether an audit makes sense for you.

You can reach us on 0121 714 8366 or 07402 955515, or visit our website at www.compressedairenergysolutions.co.uk.