Compressed Air System Audits
Measure what your system is actually doing before you spend money changing it.
Most Compressed Air Problems Are Data Problems
When a compressed air system starts causing trouble — pressure sagging at the end of the line, a compressor running far more than it used to, an energy bill that keeps climbing — the instinct is to buy a bigger compressor.
Sometimes that is correct. Frequently it is not. A new compressor installed onto a system with a 30 percent leak load, artificial demand from excess pressure, and undersized storage may very well exacerbate the problem.
A compressed air audit replaces assumption with measurement. It establishes what your system generates, what it delivers, what it costs to run, and where the difference between those numbers is going.
Compressed Air Is the Most Expensive Utility in Most Plants
Compressed air accounts for roughly 10 percent of industrial electricity consumption nationally, and only a small fraction of the energy fed into a compressor emerges as useful work at the point of use. The rest becomes heat.
That inefficiency is inherent to compression and cannot be eliminated. What can be eliminated is everything layered on top of it:
- Leak load. Industrial compressed air systems commonly lose 20 to 30 percent of total production to leaks — air that is generated, treated, and paid for, and then escapes.
- Artificial demand. Every 2 PSI of unnecessary system pressure costs roughly 1 percent in energy, and most plants run higher pressure than any application actually requires.
- Inappropriate use. Compressed air used for open blowing, cabinet cooling, personnel cooling, or moving material is often doing a job a fan or blower would do at a fraction of the cost.
- Poor control strategy. Several compressors running partially loaded against each other consume dramatically more energy than the same machines sequenced correctly.
None of these announce themselves. They show up only as a number on a utility bill that nobody has broken down.
What an Audit Measures
A compressed air audit is a data collection exercise, not a walkthrough. We instrument the system and log it through a complete production cycle so the measurements reflect how the plant actually runs — including shift changes, startup, and the periods when demand spikes.
Flow. Actual CFM delivered, logged over time rather than estimated from nameplate ratings.
Pressure. Measured at the compressor discharge, after treatment, and at the point of use — because the difference between those three numbers is where distribution problems hide.
Power. True kW draw under real operating conditions, which converts directly into what the system costs you per hour, per shift, and per year.
Demand profile. Peak versus average consumption, and how demand varies across shifts and days. This is the single most important input to correct equipment sizing, and it is almost never available before an audit.
Leak load. Ultrasonic leak detection to locate, tag, and quantify losses throughout the distribution system.
Air quality and treatment performance. Verified pressure dew point against what the application requires — over-drying costs money, under-drying costs product.
Storage and control. Whether receiver capacity is adequate for the demand events the plant produces, and whether the control strategy is running the right machines at the right time.
How the Audit Works
1. Scoping conversation. We discuss your system, your production schedule, your pain points, and what you are trying to decide. An audit performed without knowing the question rarely answers it.
2. Site walkthrough. We document the equipment, the distribution layout, treatment, storage, and every point of use — including the ones that are not on any drawing.
3. Data logging. Instruments are installed and left in place long enough to capture a representative production cycle, typically including at least one full week of normal operation.
4. Leak survey. Ultrasonic detection across the distribution system, with leaks located, tagged, and quantified so the loss can be assigned a dollar value.
5. Analysis. Measured data is modeled to establish baseline consumption and cost, then evaluated against alternative configurations and operating strategies.
6. Report and review. We sit down with your team and walk through what we found, what we recommend, and what each recommendation is worth.
Backed by Department of Energy Methodology
Bill Rimer, President of Atlantic Compressors, is a Department of Energy Qualified AirMaster+ Specialist and a CAGI Certified Specialist — one of a small number of professionals holding both credentials in Southwest Virginia.
AirMaster+ is the Department of Energy’s assessment methodology for industrial compressed air systems. It is not a manufacturer program and it is not tied to any equipment line. It provides a structured, vendor-neutral framework for measuring system performance and modeling the effect of proposed changes before any money is committed.
That distinction matters. An audit performed by someone whose only tool is a product catalog tends to conclude that you need a product. A DOE methodology asks a different question: what is this system doing, and what is the least expensive way to make it do what you need?
Our team also maintains continuing education through the Compressed Air & Gas Institute and the Compressed Air Challenge.
What You Receive
A measured baseline. What your compressed air system produces, delivers, and costs — in CFM, in kW, and in dollars per year.
A leak inventory. Located, tagged, and quantified, with the annual cost of the total leak load.
A demand profile. How your plant actually uses air across a production cycle, which becomes the basis for any future equipment decision.
Prioritized recommendations. Ranked by cost and return, separating the changes that cost nothing but a work order from the ones that require capital.
Honest conclusions. If your system is well configured and the answer is that you need additional capacity, we will tell you that. If the answer is that you need to fix drains and lower system pressure and buy nothing, we will tell you that too.
Who Should Consider an Audit
- Facilities considering a new compressor or a capacity expansion
- Plants where compressed air costs have risen without an obvious cause
- Operations experiencing pressure problems at the point of use
- Multi-compressor plant rooms with no centralized control strategy
- Facilities pursuing energy efficiency targets or utility incentive programs
- Any plant that cannot currently state what its compressed air costs per year
That last one covers most facilities. Compressed air is rarely metered separately, so its cost is usually invisible inside a plant-wide electric bill.
Audits and Engineering Assistance Are Different Services
An audit measures a system that already exists. It answers the question: what is happening, and what should we do about it?
Engineering assistance designs a system that does not exist yet. It answers a different question: what should we build, and how should it be specified?
The two often connect — an audit frequently establishes the demand data that a subsequent design depends on — but they are separate engagements. If you are planning a new facility or a plant expansion rather than diagnosing an existing system, engineering assistance is the better starting point.
Frequently Asked Questions
How long does a compressed air audit take?
Data logging typically runs at least one full week to capture a representative production cycle. Site work, analysis, and reporting extend beyond that. Rushing the logging period produces data that does not reflect how the plant actually operates.
Will an audit disrupt production?
No. Instrumentation is installed without shutting the system down, and logging occurs during normal operation. Capturing normal operation is the entire point.
Do I have to buy equipment as a result?
No. Many of the highest-return findings — repairing leaks, lowering system pressure, correcting drain operation, adjusting control strategy — require no capital equipment at all.
Is an audit worthwhile for a smaller facility?
Often, yes. Leak load and artificial demand waste air proportionally at any scale, and smaller plants typically have less redundancy when something fails.
How is this different from a free equipment assessment from a manufacturer's rep?
A vendor walkthrough is a sales visit with a product outcome. An AirMaster+ audit is a measured assessment using Department of Energy methodology, which models your system independently of any equipment line.
Can you help with utility rebate or incentive documentation?
Measured audit data is typically what those programs require. Contact us to discuss what your utility’s program needs.
Start With a Conversation
We also offer a courtesy walkthrough of your compressed air system — a no-obligation look at how your system is configured and whether a full audit would be worth your time.
Call (540) 728-1134 or contact us to schedule.