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Kaishan USA | February 4, 2026 | Uncategorized
Your workers may say they are not getting enough pressure to power their grinding equipment. But boosting the pressure at the compressor adds cost and probably won’t work.
One of the most dangerous misconceptions that undermines cost-effective operation of compressed air systems is the belief that compressed air is free.
And that belief results in some wasteful and even harmful ideas: Blow some compressed air to clean your workspace!
The list of noxious ideas that float around a typical workshop is endless. And it makes compressed air management a nightmare.
Compressed Air Is Definitely NOT Free!
So, first and foremost, compressed air users need to counter that argument and make sure their team understands that compressed air is definitely not free!
Management of a compressed air system requires diligence and close attention to key measurements that provide important insights into its operation.
We’ll start with an obvious one that has widespread implications: energy consumption.
Key Metrics for Air Compressor Cost Efficiency
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| Metric | Key Idea |
|---|---|
| 1. Energy Consumption | Checking how many kilowatt hours your system consumes every month maybe your first indication that you’re wasting energy. |
| 2. Percentage of Load Hours vs. Run Hours | If load hours are less than 50% of run hours, you’re wasting money. |
| 3. Header Pressure | Set your compressed air system at the lowest pressure possible. |
Metric No. 1: Energy Consumption
In our thousands of visits to facilities across the country, we’ve found that the largest electricity consumers in most plants are air compressors. Depending on the industry and process, air compressors can account for up to 30% of a typical plant’s electricity consumption, according to the U.S. Department of Energy.
As a result, checking your system’s energy consumption may well be your first indication that you’re wasting energy—from air leaks and inflated header pressures to cleaning workspaces. And any wasted energy comes right off the bottom line.
It’s called “artificial demand.” And there’s a cost associated with every use, whether it’s planned or not.
We’ve seen too many instances where a facility manager said a compressor “just wasn’t keeping up.” Then an air audit uncovers a variety of off-the-books uses—someone tapping into the air supply to cool a product emerging from a hot oven or to clean up their workspace.
Removing debris from a work product may be an authorized use, depending on the application. But many other uses? Not so much.
All too often, we’ve found that most unnecessary compressed air use stems from companies using the wrong technology…
- Keeping a valve cracked open to drain condensate, for example, rather than using a zero-loss drain.
- Cooling off a product with compressed air, when a low-pressure blower or fan would suffice.
Some use compressed air for breathing systems. We’ve seen workers cool themselves off with compressed air. That’s expensive and dangerous.
Artificial Demand Makes It Hard to Manage Compressed Air Costs
Beyond the energy waste and air compressor cost-efficiency issues, layering in too many extraneous uses creates a false impression of your needs. If you have too many of these “fixes,” it’s tough to know how much air flow and even pressure you really need.
Artificial demand makes the facility manager’s life more difficult. How can you manage a resource when you can’t control how it’s used?
Our advice: check your energy consumption regularly. At least monthly. And if there’s any significant change, investigate immediately by calling in your compressed air consultant.
The next stat you’ll want to look at is the ratio of load hours to run hours.
Metric No. 2: Percentage of Load Hours vs. Run Hours
If load hours are less than 50% of run hours, you’re probably wasting money.
Most compressor control screens show two important stats:
- Run hours, the amount of time your compressor is on
- Load hours, the number of hours your compressor is performing work
If the load hours are less than 50% of the run hours, your compressor is idling too much. It’s simply running to keep the oil moving. So the energy it consumes is wasted. More money down the drain.
Even more importantly, when your compressor is in unload mode, you lose the heat of compression. Water will condense out of the oil because there’s no heat to evaporate the condensation. And there’s an additional risk of low oil pressure and bearing damage in poorly maintained machines.
As a result, no manufacturer wants you to run your machine idle. If your machine is idling too much, it could indicate a more serious problem: that your compressor is oversized for your application. Learn more about “Demystifying Air Compressor Sizing.”
Once again, you’ll want to bring in a compressed air professional. You’ll not only save money, but also avoid costly downtime.
And while you’re monitoring run time, you’ll want to pay attention to your service intervals. Trust us, you don’t want to defer maintenance; those short-term savings will cost you dearly in the long run.
The last important air compressor cost-efficiency measurement is header pressure.
Metric No. 3: Header Pressure
All too often, companies boost the pressure in their system when they notice a pressure drop at the more distant applications they’re servicing. That almost always causes more problems than it solves.
Here’s why artificially boosting your compressor system pressure is always costly and usually counterproductive:
- Wasted energy. Most companies set their header pressure to accommodate the highest requirements in their shop, usually around 90 PSIG. But all too often, we see plants set their header pressure at 100, 110 or even 120 PSIG, then use regulators to bring the pressures down for individual tools. However, if you set your compressor to supply 110 PSIG to every application, you’ll need to lower that pressure at almost every use. That’s incredibly costly—the Compressed Air and Gas Institute estimates that every 2-PSIG increase in pressure increases energy cost by 1%. The goal is to maintain your compressed air system at the lowest pressure possible. Find out how in our blog post, “Five Questions You Need to Answer to Get Compressed Air Header Pressure Right.”
- Short Cycling. Setting the header pressure too high is one of the leading causes of short cycling, also known as rapid or fast cycling. Rapid cycling happens when you’re constantly turning your compressor on and off, loading and unloading. And it can be devastating to your compressor, causing extra wear and tear on the motor, valves, bearings, and other internal parts; overheating; moisture and oil carryover; wasted energy; additional maintenance; and a shorter lifespan for both the oil and your compressor. All of which cost you more.
- Leaks. Setting the header pressure too high can worsen leaks. Every time you increase the header pressure, more air escapes from the system through small gaps in the piping or connections. And the increased volume rushing through the gaps makes those leaks even larger over time. Specifically, increasing header pressure from 100 PSIG to 125 PSIG is a 20% increase in pressure, which directly correlates to a 20% increase in leak flow. If you need help, read our post on fixing leaks.
- Worsened Pressure Problems. Setting the header pressure too high rarely works. Because of the inverse relationship between pressure and flow, increasing the pressure at the compressors actually reduces the flow, worsening the situation at end-use applications. Here’s why: It’s the flow that is reduced as you deliver air to end-use tools, not the pressure. So, the problem almost always is not with the system pressure, but with the flow. In fact, a study by the Energy Efficiency Center at Oregon State University showed that reducing header pressure from 112 PSIG to 105 PSIG lowered energy consumption in a test system by 41,986 kWh per year, resulting in annual savings of $2,985.
And all those regulators you set to reduce the pressure will now have to reduce it by an additional 5 PSIG. The result is less compressed air volume (and lower pressure) at the end of the line. So you get less flow and more cost.
Your maintenance team will likely not believe it, but the best way to increase pressure at the end of the line is often to reduce it at the air compressor. That boosts CFM and delivers more air flow to the tool. And it’s at the correct pressure.
Regulators help control the air pressure going to an end-use application—and that’s good. However, they waste energy, and having too many regulators may indicate you could save significantly by reconfiguring your compressed air system.
In short, anytime your system operates at a higher pressure than your facility requires, you’re creating artificial demand and wasting air, according to CAGI.
So, while you should pay attention to energy consumption, load hours as a percentage of run hours and header pressure, there’s one important number you’ll want to view with caution.
Initial Cost: The One Metric You Should Not Focus On
Most companies today find that the sticker price is less than 20% of the total cost of ownership of a compressor. This finding is supported by a U.S. Department of Energy study from 2000 that found the cost of buying and installing an air compressor accounted for only 12% of lifetime costs, with electricity gobbling up 76% of the total cost of ownership. Maintenance costs made up the remaining 12%.
According to the U.S. Department of Energy, the initial expense to acquire and install the equipment is only 12% of the lifetime cost. On the other hand, electricity makes up 76% of a compressor’s total cost of ownership.
Clearly, focusing on initial cost while ignoring energy efficiency, maintenance costs and equipment longevity is short-sighted. As shown, they dwarf the sticker price by a wide margin. For the ultimate in energy efficiency, consider our KRSP2 two-stage rotary screw air compressor, equipped with a variable-speed drive.
Once again, your compressed air professional can help you run the numbers. And even give you an estimate for consumables and major repairs over the first five or 10 years of ownership.
For more on lifetime costs and total cost of ownership, see our blog post, “Six ‘Gotchas’ That Turn Low Sticker Prices into High Lifetime Costs.”
Getting Help with the Numbers
Most companies need help setting up effective metrics to achieve their air compressor cost-effectiveness goals. That’s why we partner with a nationwide network of independent distributors, who can offer expert guidance, faster response times and personalized support tailored to your needs.
With factory-trained technicians and a deep understanding of industrial applications, our distributors help maximize efficiency and minimize downtime.
So, when you buy through our distributor network, you’re getting more than a product—you’re getting a local partner who cares about your business and wants it to succeed. They don’t just sell compressors—they build relationships, ensuring you get the right system, reliable service and quick access to parts when you need them most.
Key Metrics for Air Compressed Cost Efficiency
- Metric No. 1: Energy consumption. Check how many kilowatt hours your system consumes every month.
- Metric No. 2: Percentage of load hours vs. run hours. If load hours are less than 50% of run hours, you’re wasting money.
- Metric No. 3: Header pressure. Set your compressed air system to the lowest possible pressure.
Let Us Help
Getting the right metrics to measure the cost-effectiveness of your compressed air system is critical to all the processes that rely on it. If you need help, get in touch with the experts at Kaishan. Contact us today.
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