Compressed Air System Upgrade: AEC Revenue Model for a PA Manufacturer

Compressed air is the most expensive utility in most manufacturing plants and the least examined. It typically accounts for 20 to 30 percent of a facility's total electricity load, and industry assessments consistently find that a quarter to a third of that is wasted — lost to leaks, oversized equipment, and inappropriate end uses.

That makes it an unusually strong candidate for Tier II AEC generation, because the savings are large, well documented, and straightforward to verify.

This model works through what a system upgrade would save at a mid-size industrial facility and what those savings produce in AEC revenue. Every input is stated.

Where the waste is

Three sources account for most of it.

• Leaks. A compressed air system that has not been actively maintained commonly loses 20 to 30 percent of total output through leaks. A single quarter-inch leak at 100 psi wastes roughly 100 cfm — enough to require a meaningful share of a compressor's capacity, running continuously, producing nothing.
• Oversized or poorly sequenced compressors. Multiple compressors running at partial load draw substantially more power per cfm than a smaller number running near full load. Systems that grew incrementally as production expanded frequently end up in this state.
• Inappropriate end uses. Compressed air used for cooling, drying, agitating, or cleaning where a blower or fan would do the same work at a fraction of the energy cost.

The baseline facility

A southeastern Pennsylvania industrial facility where the compressed air system accounts for 37 percent of total electricity spend — high, but not unusual for a plant with air-driven process equipment.

The system has grown incrementally, has not had a leak survey in several years, and runs multiple compressors at partial load through most of the production schedule.

What the upgrade involves

A comprehensive compressed air upgrade generally addresses all three waste sources together, because fixing one in isolation often shifts the problem rather than removing it:

• Leak detection and repair using ultrasonic survey across the distribution system
• Compressor sequencing controls so that units load and unload in a coordinated way rather than independently
• Pressure optimization — reducing system pressure to the minimum the highest-demand end use actually requires, since every 2 psi of unnecessary pressure costs roughly 1 percent in energy
• End-use substitution where blowers can replace compressed air

The savings

For a facility of this profile, a comprehensive upgrade would eliminate approximately 2,531,772 kWh of annual waste.

At a blended industrial rate near $0.06/kWh, that is roughly $150,905 in annual electricity cost savings.

AEC revenue

2,531,772 kWh ÷ 1,000 = 2,532 MWh = 2,532 AECs annually.

At a recent spot price of $26/AEC, that is $58,236 in annual AEC revenue. At the RY2025 weighted average of $26/AEC, that is $68,161.

Over a ten-year equipment life, that is roughly $582,000 to $682,000 in AEC revenue alone.

AECs are issued from the PennAEPS certification date forward. Savings occurring before certification do not produce credits, so certification timing determines when the revenue stream begins. At this scale — 2,532 AECs a year — that is roughly $5,680 per month at the $26 weighted average for every month a completed system remains uncertified. Revenue that is not issued cannot be recovered later.

The incentive stack

Compressed air projects are well served by Act 129 utility programs, which treat them as custom measures and calculate incentives from documented kWh savings.

For a project of this scale with an installed cost around $210,360, a custom incentive can approach or cover the full project cost. Where that happens, the capital barrier effectively disappears and the entire savings stream becomes return from day one.

Even without an incentive, the arithmetic is strong: $210,360 against $150,905 in annual energy savings is a simple payback of about 1.4 years before AEC revenue is counted at all.

Adding AEC revenue at $26 brings the annual recurring benefit to $219,066.

Why this project profile works well for AECs

Three reasons worth understanding, because they generalize.

• The savings are large in absolute terms. 2,532 AECs annually is a meaningful volume. Many efficiency measures produce a few hundred.
• The measurement is clean. Compressed air savings are calculated from measured flow, pressure, and power draw before and after. Where a utility custom incentive was claimed, that calculation has already been performed and third-party reviewed.
• The measure life is long. Leak repair requires ongoing maintenance to hold, but sequencing controls and pressure optimization persist for the life of the equipment.

Substituting your own numbers

• Annual kWh saved — from your incentive application, M&V report, or pre/post metering
• Divide by 1,000 — annual AEC count
• Multiply by the AEC price — $26 market reference
• Apply the measure life for total revenue

A facility saving 500 MWh annually is looking at roughly $11,500 to $13,500 per year. One saving 5,000 MWh is looking at $115,000 to $135,000.

Frequently asked questions

• Does the project need a utility incentive to qualify for AECs? No. The incentive and the AEC are separate programs. Where an incentive was claimed, its savings documentation usually supports the AEC application — but AEC eligibility does not depend on it.
• How are savings verified without an incentive application? Pre- and post-installation measurement of system power draw, supported by flow and pressure logging. For leak repair specifically, ultrasonic survey documentation quantifying leak volume before and after.
• Do leak repairs count, given that leaks recur? Leak reduction produces verified savings and is creditable. Because leaks recur without ongoing maintenance, sustained savings require a maintenance program — which also matters for continued verification.
• Can a completed project still be registered? Yes, where it remains operational and verifiable. AEC issuance begins at certification rather than at installation, so a project completed earlier generates credits from certification forward over its remaining measure life.
• What if compressed air is a smaller share of our load? The percentage matters less than the absolute kWh. A facility where compressed air is 15 percent of a very large load may present more opportunity than one where it is 37 percent of a small one.

Model your compressed air system

Submit your facility details — completed project or planned upgrade — for a project-specific AEC evaluation.