For facilities that regularly consume nitrogen or oxygen gas, the price paid for the gas itself is only one component of the total cost.

Deliveries, cylinder handling, tank rentals, storage, administrative requirements and potential supply disruptions can all add to the true cost of maintaining a dependable gas supply.

That’s why businesses evaluating on-site nitrogen or oxygen generation systems should look beyond the initial equipment investment and consider the system’s potential return over its entire operating life.

From Recurring Gas Purchases to On-Site Production

Traditional gas supply arrangements typically require businesses to continually purchase nitrogen or oxygen from an outside supplier.

Depending on the application and volume, gas may arrive in cylinders or other delivered formats. Regardless of the delivery method, the business remains dependent on an outside supply chain.

On-site generation changes the economics.

Instead of continually purchasing the gas itself, a business invests in equipment that produces nitrogen or oxygen from the surrounding air. Once installed, the system can generate gas whenever it is required.

The question therefore isn’t simply:

“How much does an on-site gas generator cost?”

A more useful question is:

“How much could our current gas supply method cost us over the next five, ten or even twenty years?”

Where Does the ROI Come From?

Several areas can contribute to the financial return of an on-site gas generation system.

Reduced Gas Purchasing Costs

The most direct opportunity for savings is reducing or eliminating recurring purchases of delivered nitrogen or oxygen.

Facilities with substantial and consistent gas consumption can potentially realize significant savings over the life of a properly sized system.

Instead of paying a supplier for each additional unit of gas consumed, the facility generates the gas itself.

Fewer Delivery-Related Expenses

Delivered gas can carry expenses beyond the gas itself.

Depending on the supply agreement, costs can be associated with:

• Delivery
• Transportation
• Cylinder or tank rental
• Fuel or environmental surcharges
• Handling
• Storage

Generating gas at the point of use can eliminate or substantially reduce many of these recurring expenses.

Reduced Cylinder Handling

Cylinder-based gas supplies also require employees to receive, move, store and replace cylinders.

That consumes labor that could otherwise be spent on production and other valuable activities.

An on-site generation system can automate much of the gas supply process, reducing the need for employees to continually manage cylinders.

More Predictable Operating Costs

Outside gas pricing can change over time due to transportation costs, supplier pricing and other market factors.

On-site generation moves more of the expense under the facility’s control. After the equipment investment, operating expenses primarily revolve around items such as electricity, compressed air and routine maintenance.

That can make long-term gas costs more predictable.

Reliability Has Financial Value, Too

ROI isn’t limited to the amount shown on a gas invoice.

What happens if your facility runs low on nitrogen or oxygen and the next delivery isn’t available?

For businesses where gas is critical to production, an interruption can slow or stop operations.

The financial impact of downtime can quickly outweigh relatively small differences in gas pricing.

An appropriately designed on-site generation system provides a continuous source of gas at the facility, helping businesses reduce their reliance on external delivery schedules.

That additional supply security can be an important part of the system’s overall value.

Produce the Purity You Actually Need

One often-overlooked factor in nitrogen generation ROI is purity.

Higher nitrogen purity generally requires more energy to produce. Not every application needs ultra-high-purity nitrogen.

For example, an application that performs properly at 98% nitrogen doesn’t necessarily benefit from producing 99.999% nitrogen.

This is why properly sizing and specifying the system is so important.

On Site Gas Systems offers both PSA and membrane nitrogen generation technologies, allowing systems to be matched to an application’s actual purity, flow and pressure requirements.

Producing the appropriate purity rather than simply maximizing purity can help improve system efficiency and operating economics.

Calculating the Payback Period

Every facility is different, which means there isn’t one universal ROI calculation for an on-site gas generator.

A basic evaluation should compare the total current cost of delivered gas against the projected cost of owning and operating an on-site system.

Factors to evaluate include:

• Annual nitrogen or oxygen consumption
• Current gas price
• Delivery and rental charges
• Required purity
• Required flow rate
• Required pressure
• Hours of operation
• Electricity costs
• Compressed air requirements
• Maintenance expenses
• Initial equipment and installation costs

From there, a business can estimate annual savings and determine an approximate payback period.

For example, if a facility spends $100,000 annually on its current gas supply and an on-site system reduces the total annual gas-related expense to $35,000, the potential operational savings would be approximately $65,000 per year.

The actual economics will vary substantially by facility, but the principle is straightforward: the more consistently a business consumes gas, the more valuable producing that gas on-site can become.

Think Beyond the Initial Payback

Reaching the payback point isn’t the end of the ROI story.

Once cumulative savings have offset the initial investment, continued operation can generate additional savings year after year.

Equipment lifespan therefore matters.

A well-designed gas generation system that continues operating reliably for many years can deliver considerably more value than the initial payback calculation alone suggests.

That makes system quality, proper sizing and ongoing maintenance important considerations when evaluating competing solutions.

Nitrogen and Oxygen Generation as a Long-Term Investment

For many facilities, nitrogen and oxygen aren’t occasional purchases. They’re essential production inputs.

When gas consumption is significant and ongoing, continually purchasing delivered gas means continually paying an outside supplier.

On-site generation provides an opportunity to transform that recurring expense into an investment in the facility’s own infrastructure.

The potential benefits extend beyond direct savings to include:

• Greater supply independence
• More predictable operating expenses
• Reduced delivery requirements
• Less cylinder handling
• On-demand availability
• Gas production matched to actual requirements

Determine the Potential ROI for Your Facility

The best way to understand the economics of on-site generation is to evaluate your facility’s actual gas consumption and operating requirements.

On Site Gas Systems designs and manufactures nitrogen and oxygen generation systems for industrial, commercial, medical and specialized applications. Systems can be engineered around your required purity, pressure and flow rate to help maximize efficiency and long-term value.

Contact On Site Gas Systems to discuss your current nitrogen or oxygen usage and determine whether on-site generation makes financial sense for your operation.

Across a wide range of industries, industrial gases are essential for daily operations. Nitrogen and oxygen support manufacturing processes, food preservation, water treatment, healthcare applications, metal fabrication, and countless other critical functions. Traditionally, organizations have relied on delivered gas cylinders, liquid gas tanks, or bulk gas suppliers to meet these needs.

However, more businesses are recognizing the advantages of on-site gas generation. By producing nitrogen or oxygen directly at their facility, companies gain greater control over supply, reduce operating costs, and improve reliability. As gas consumption increases, on-site generation often becomes one of the most cost-effective and efficient solutions available.

Here are some of the industries benefiting most from on-site gas generation technology.

Food and Beverage Processing

The food and beverage industry is one of the largest users of nitrogen gas generation systems. Nitrogen plays a critical role in food packaging, product preservation, and quality control.

Manufacturers use nitrogen to:

• Extend shelf life
• Preserve flavor and freshness
• Reduce oxidation
• Protect product appearance
• Minimize food waste

Whether packaging snack foods, coffee, meat products, dairy items, or prepared meals, food processors rely on consistent nitrogen supplies to maintain product quality. On-site nitrogen generation eliminates delivery delays and provides a dependable source of high-purity gas for packaging operations.

Pharmaceutical and Biotechnology Manufacturing

Pharmaceutical companies require highly controlled environments to ensure product safety and regulatory compliance. Nitrogen is commonly used for blanketing, inerting, packaging, and protecting sensitive compounds from oxidation and contamination.

On-site gas generation offers several benefits for pharmaceutical manufacturers, including:

• Reliable gas purity
• Continuous production support
• Reduced supply chain risk
• Improved operational efficiency

As pharmaceutical production scales, the ability to generate nitrogen on demand becomes increasingly valuable.

Metal Fabrication and Manufacturing

Metal fabrication facilities utilize nitrogen and oxygen for numerous processes, including laser cutting, welding, heat treatment, and metal processing.

Nitrogen is often used as an assist gas during laser cutting because it produces cleaner cuts and helps prevent oxidation. Oxygen is commonly used to enhance cutting speeds and improve combustion during certain fabrication applications.

On-site gas generation helps fabricators:

• Reduce gas costs
• Improve production uptime
• Eliminate delivery scheduling concerns
• Ensure consistent gas availability

For manufacturers operating multiple shifts, uninterrupted gas supply is critical to maintaining productivity.

Electronics Manufacturing

The production of semiconductors, circuit boards, and electronic components often requires highly controlled environments. Nitrogen is frequently used to create inert atmospheres that protect sensitive materials and prevent contamination during manufacturing.

Benefits of on-site nitrogen generation for electronics manufacturers include:

• Stable gas purity levels
• Improved quality control
• Reduced operational costs
• Enhanced process consistency

As electronics manufacturing continues to advance, reliable nitrogen supply remains essential for maintaining precision and product quality.

Water and Wastewater Treatment

Oxygen plays an important role in many municipal and industrial water treatment applications. Increased dissolved oxygen levels help improve biological treatment processes and support efficient wastewater management.

On-site oxygen generation provides facilities with:

• Continuous oxygen supply
• Lower operating costs
• Reduced dependence on deliveries
• Improved treatment efficiency

Many treatment plants are adopting on-site oxygen systems to increase process performance while controlling long-term expenses.

Oil and Gas Operations

The oil and gas sector relies heavily on nitrogen for well stimulation, pipeline maintenance, pressure testing, inerting, and safety applications. Given the remote locations where many operations occur, dependable gas availability is especially important.

On-site nitrogen generation allows operators to:

• Improve operational flexibility
• Reduce transportation costs
• Minimize logistical challenges
• Increase reliability in remote environments

The ability to generate nitrogen wherever it is needed helps support both safety and productivity throughout the energy sector.

Chemical Processing

Chemical manufacturers frequently use nitrogen to prevent unwanted reactions, reduce explosion risks, and maintain product quality. Nitrogen blanketing and inerting are common applications across chemical processing facilities.

On-site generation helps chemical plants:

• Maintain safe operations
• Ensure consistent gas availability
• Lower gas procurement expenses
• Support production continuity

For facilities with high nitrogen consumption, on-site systems often provide substantial cost savings compared to delivered gas.

Healthcare and Medical Facilities

Hospitals and healthcare facilities rely on oxygen for patient care and medical treatment. While many facilities traditionally depend on delivered oxygen, on-site oxygen generation is becoming increasingly common.

Benefits include:

• Enhanced supply security
• Reduced storage requirements
• Lower operating costs
• Greater emergency preparedness

Healthcare organizations can improve resilience while maintaining access to medical-grade oxygen when it is needed most.

Mining and Mineral Processing

Mining operations use nitrogen for fire prevention, inerting, and explosion suppression in underground environments. Oxygen is also utilized in various extraction and mineral processing applications.

Generating gases on-site provides mining companies with:

• Reliable supply in remote locations
• Lower transportation costs
• Improved safety
• Reduced downtime

Because many mining sites operate far from traditional gas suppliers, on-site generation offers a practical and efficient alternative.

Why More Industries Are Switching to On-Site Gas Generation

Regardless of industry, organizations are facing many of the same challenges:

• Rising gas costs
• Supply chain disruptions
• Production downtime risks
• Sustainability goals
• Increasing demand for operational efficiency

On-site gas generation addresses these concerns by producing nitrogen or oxygen directly at the point of use. Facilities gain greater control over their gas supply while reducing dependence on third-party deliveries.

Find the Right Gas Generation Solution with On Site Gas Systems

From food processing and pharmaceuticals to manufacturing, healthcare, and water treatment, on-site gas generation is helping organizations improve efficiency, reduce costs, and maintain reliable operations. As demand for industrial gases continues to grow, generating nitrogen and oxygen on-site provides a long-term solution that supports both productivity and profitability.

At On Site Gas Systems, we design and manufacture advanced nitrogen and oxygen generation systems for a wide range of industries and applications. Contact our team today to learn how an on-site gas generation solution can help your organization achieve greater efficiency, reliability, and cost savings.