The Manufacturing Gas Costs Your Bill Can’t Explain – and How to Fix Them

A food manufacturer in Southern California paying $45,000 per month on natural gas has a problem that its gas bill cannot describe. The bill shows total therms consumed and a rate per therm. It does not show how many of those therms escaped through failed steam traps before reaching the process. It does not show how much excess fuel the boiler burned because the air-to-fuel ratio drifted outside the optimal range last Tuesday. It does not show how many therms the overnight process heat cycling consumed while the facility ran at 30% capacity. Manufacturing gas costs are built from these three invisible losses – and at a facility spending $45,000 per month, they typically represent $6,000-$13,500 in monthly waste that the bill confirms as consumption but cannot locate as a cause.

The industrial sector consumed a record 23.6 billion cubic feet of natural gas per day in 2025 per the EIA’s 2025 consumption analysis, the highest level on record, and the EIA forecasts further records in 2026 and 2027 (Energies Media analysis) as manufacturing activity continues rising as manufacturing activity outpaces efficiency gains. The Henry Hub spot price averaged $4.00 per MMBtu in 2025 – up 80% from $2.24 per MMBtu in 2024 per EIA natural gas price data. Every therm of manufacturing gas costs that goes to steam leakage, combustion waste, or unmonitored cycling is paid at this year’s rate and will be paid at next year’s higher rate unless the source of waste is identified and addressed. The energy monitoring platform that makes manufacturing gas costs visible at the equipment level at the equipment level is the prerequisite for reducing them – not the equipment upgrades, not the rebate programs, not the rate negotiations. Visibility first. The energy monitoring platform overview covers the full deployment approach.

As an approved utility aggregator with SoCal Gas, SCE, SDG&E, MCE, and SVCE, Envigilance works with manufacturing facilities across California and beyond to identify where manufacturing gas costs are being generated, deploy monitoring that makes the invisible losses visible, and connect qualifying facilities to SoCal Gas rebate programs that pay for equipment improvements addressing the root causes. The guarantee is direct: spending over $10K per month without a BMS, we guarantee a 10% reduction in energy consumption in 12 months or we work for free until we deliver it.

Why 84% of Manufacturing Gas Costs Come From Process Heat, Not Buildings

The starting point for understanding manufacturing gas costs is where the gas actually goes. Per Energy Innovation’s analysis and the EIA industrial energy overview, 84% of industrial fossil fuel use is dedicated to process heating – 40% to boilers generating steam for food processing, refining, chemical manufacturing, and paper production, and 44% to direct-fired industrial equipment including kilns, furnaces, ovens, and chemical reactors. The remaining 16% covers machine power, building HVAC, and material handling. Manufacturing gas costs are therefore overwhelmingly a process heat problem, not a building efficiency problem. Insulation upgrades, LED lighting, and HVAC improvements address 16% of the energy profile at best. The other 84% sits in the boiler room and process equipment – and that’s where manufacturing gas costs monitoring must be focused.

The EIA’s industrial energy use data – updated for 2025 – confirms that the industrial sector – of which manufacturing is the largest component – accounts for 33% of total U.S. energy consumption. Within manufacturing, natural gas boilers hold 47.1% of the industrial boiler fuel type market per Global Market Insights, reflecting the dominance of gas-fired steam generation in every major manufacturing vertical. The practical consequence for a facility manager reviewing manufacturing gas costs is that the highest-leverage reduction opportunities are concentrated in a small number of systems: the boiler plant, the steam distribution network, and the direct-fired process equipment. A 400,000 square foot food manufacturing facility might have 12 boilers, 2,000 steam traps, and 40 process ovens. Monitoring manufacturing gas costs at the bill level shows total consumption. Monitoring at the equipment level – circuit by circuit, boiler by boiler, trap zone by trap zone – shows where that consumption is productive and where it is waste. The submetering resource covers circuit-level gas monitoring. For distribution and cold storage operations with significant gas loads, the warehouse energy monitoring resource covers combined gas and electricity monitoring.

Steam System Leaks: The Invisible 25% of Your Manufacturing Gas Bill

Steam leakage is the largest single source of avoidable manufacturing gas costs in any facility with a steam distribution system – and it is almost entirely invisible without monitoring. According to the U.S. Department of Energy, steam leakage in industrial facilities can account for up to 25% of total steam generation. For a medium-sized industrial boiler operating at 8-10 bar pressure, a single 3mm leak point wastes over 50 kg of steam per hour. Across a typical large facility with 15-30 active leak points in the distribution network, the combined waste runs into thousands of therms per month. This waste does not appear as a separate line item on the manufacturing gas bill – it appears as normal consumption, indistinguishable from productive process heat delivery. The only way to separate it from useful consumption is to measure consumption at each steam zone and compare it against the process load the zone is actually serving.

The primary mechanism of steam system manufacturing gas costs waste is the failed steam trap. Steam traps are designed to discharge condensate while retaining live steam – when a trap fails in the open position, it continuously passes live steam into the condensate return line. A single failed open trap at 100 psig can waste 20-50 kg of steam per hour depending on orifice size. A facility with 2,000 steam traps – common in food processing, chemical, and pharmaceutical manufacturing – has a statistical failure rate of 5-15% per year in an unmonitored system. At any given time, 100-300 traps may be failed open, collectively wasting 2,000-15,000 kg of steam per hour. The financial impact compounds: the boiler works harder to maintain system pressure, water makeup costs increase as condensate recovery drops, and process quality can degrade as uneven pressure reduces heat delivery consistency. The DOE Advanced Manufacturing Office steam benchmarking guide provides the methodology for quantifying these losses. For warehouse operators with steam systems, the warehouse demand charges resource covers how steam load relates to electricity demand profiles. Identifying failed traps requires either temperature sensors at each trap station or thermal imaging – both of which generate permanent monitoring records that support SoCal Gas EERB rebate applications for steam system upgrades. The temperature monitoring capability deployed alongside gas consumption sensors provides exactly this trap-level thermal evidence.

Combustion Inefficiency: The 5-20% Manufacturing Gas Cost Nobody Measures

Every gas-fired boiler, furnace, and oven in a manufacturing facility operates at a specific air-to-fuel ratio. When that ratio is properly calibrated, combustion is nearly complete – the fuel is fully oxidised and heat transfer to the process is maximised. When it drifts – either too lean (excess air) or too rich (excess fuel) – the boiler burns more gas to deliver the same amount of process heat. According to DOE data cited by Sage Metering’s combustion efficiency analysis, optimising combustion efficiency can reduce industrial fuel consumption by 5-20%, with facilities using advanced monitoring reporting improvements of 8-25% in documented case studies. For a facility paying $30,000 per month in manufacturing gas costs, a 10% combustion efficiency improvement is $3,000 per month in direct bill reduction – without changing any equipment, modifying any process, or reducing production output.

Poor combustion control is estimated to cost U.S. industrial boiler operators $2.3 billion in annual fuel costs based on DOE waste factor estimates. The contributing factors are predictable and remediable: burner fouling from particulate accumulation, O2 trim system calibration drift, damper actuator wear, and seasonal air density changes that shift the stoichiometric point without triggering any alarm. None of these cause the boiler to malfunction – they cause it to run inefficiently, quietly adding to manufacturing gas costs month after month. The fix in most cases is a combustion tune-up combined with continuous flue gas monitoring that alerts maintenance when O2 and CO levels drift outside optimal ranges. The EPA industrial boiler guide documents the efficiency ranges achievable across different boiler configurations and fuel types. The demand charge reduction guide covers how electricity and gas efficiency stack for maximum combined savings. Combustion monitoring data also serves as the baseline documentation for SoCal Gas EERB rebate applications – making continuous monitoring a prerequisite for accessing both the cost reduction and the rebate revenue simultaneously. The utility programs resource covers SoCal Gas program incentives. The peak demand charges resource covers the electricity demand cost reduction that complements manufacturing gas costs monitoring.

Unmonitored Process Heat Cycling and What It Costs by Industry

The third driver of avoidable manufacturing gas costs is process heat cycling – the pattern of equipment running at full gas consumption during production cycles and failing to modulate appropriately during changeovers, scheduled downtime, cleaning cycles, and shift transitions. The IEA’s industrial heat analysis confirms food processing, textiles, and machinery production represent around 30% of total industrial energy use and are least constrained by temperature requirements. In food manufacturing, an oven or dryer maintaining full process temperature during a 90-minute line changeover burns gas at full rate to heat empty equipment. In chemical manufacturing, a reactor jacket that doesn’t receive a setpoint reduction signal during a batch hold period continues drawing steam from the boiler. In paper manufacturing, a steam-heated press roll that isn’t isolated during a web break continues consuming therms at the same rate as active production. These are not equipment failures – they are control and visibility gaps. The manufacturing gas costs they generate are real and recurring, but they register on the gas bill as normal consumption because the process was technically running.

The financial scale of process heat cycling waste varies by industry but is consistently significant. For food and beverage manufacturers – the third largest industrial energy consumer in the EU in 2024 per Eurostat, and a major industrial gas consumer in California – changeover and cleaning cycle gas consumption can represent 8-15% of total manufacturing gas costs in facilities without automated setpoint control. For chemical manufacturers running batch processes, unmonitored holds and transitions can waste 10-20% of process heating gas. For paper and packaging operations, web break and grade change events can drive disproportionate short-period gas consumption spikes that inflate monthly totals. In all cases, the same mechanism applies: without real-time visibility into what each piece of process equipment is consuming versus what it is producing, there is no feedback loop to identify and address the waste. The commercial real estate energy monitoring platform applies these principles to multi-facility manufacturing portfolios. The retail energy monitoring resource covers gas cost reduction for mixed retail and production facilities., ranking sites by gas cost reduction opportunity.

Why Manufacturing Gas Costs Keep Rising – and Why the Trajectory Is Structural

Manufacturing gas costs are not rising because facilities are using more gas. U.S. industrial natural gas consumption has been relatively stable per the EIA 2024 Natural Gas Annual – industrial deliveries were 23.44 Bcf/d in 2024, consistent with recent years. Manufacturing gas costs are rising because the price of every therm consumed is increasing. The Henry Hub spot price averaged $4.00/MMBtu in 2025 – an 80% increase from 2024’s $2.24/MMBtu. Industrial gas prices at the wellhead track Henry Hub with a lag and regional basis differential. For California manufacturers in SoCal Gas territory, the 12% rate increase effective February 2025 on top of already-elevated commodity prices means the same consumption profile generates a materially higher bill in 2025 than it did in 2024.

The structural driver is LNG export growth. Per the EIA’s 2025 natural gas consumption analysis, U.S. LNG exports have grown from 0.5 Bcf/d in 2016 to 13+ Bcf/d in 2025, creating a structural link between domestic wellhead prices and international LNG prices that didn’t exist a decade ago. California’s Title 24 benchmarking requirements add regulatory pressure alongside the commodity cost increases. Domestic price spikes now respond not just to cold weather but to global LNG demand events – which are less predictable and less seasonal than weather. For manufacturing operations that have historically modelled gas costs as a relatively stable input, this structural price volatility represents a new category of financial risk. The correct response is not to try to predict price movements – it is to reduce the volume of therms purchased, particularly the volume that is generating waste rather than output. A consumption reduction locked in today saves at today’s rate and at every higher rate that follows. The energy cost adjustment guide covers how variable rate components compound. The real-time energy monitoring ROI guide documents payback timelines across manufacturing and industrial building types.

What Real-Time Gas Monitoring Reveals That Your Bill Doesn’t

The manufacturing gas bill is a monthly summary. Real-time gas monitoring is a continuous record at five-minute resolution. The difference between them is the difference between knowing what manufacturing gas costs were and knowing why they were that amount. A facility whose gas bill increased $4,000 last month has no information from the bill about whether that increase came from a failed steam trap in zone 3, a combustion drift event on boiler 2, an extended process heat cycling event on line 4 during the changeover Wednesday night, or a combination of all three. Real-time monitoring with equipment-level submetering answers that question before the bill arrives – and more importantly, alerts the maintenance team while the waste is still occurring rather than 30 days after it has been paid.

The monitoring deployment covers gas consumption sensors on boiler feed lines, individual steam zone distribution headers, and direct-fired process equipment circuits. Temperature sensors on steam trap stations identify failed-open traps by the thermal signature of live steam passing into the condensate return. Flue gas monitoring on boiler exhaust tracks O2 and CO2 percentages that indicate combustion efficiency. The platform aggregates all of this into a single dashboard that shows manufacturing gas costs by system, by shift, by production line, and by day – giving facility managers and energy teams the visibility to identify and address waste on the same operating cycle it occurs. For California manufacturing facilities, the same monitoring data establishes the NMEC baselines that SoCal Gas EERB custom-path rebate applications require – meaning every dollar spent on monitoring infrastructure also supports the rebate claim that offsets the cost of the equipment fix. The water leak detection capability deployed on the same sensor infrastructure identifies steam condensate return losses and plumbing failures that affect hot water system efficiency and boiler makeup water costs.

The SoCal Gas Rebate Stack for California Manufacturers

California manufacturing facilities in the SoCal Gas service territory can access a layered set of incentives that stack on top of the manufacturing gas costs savings monitoring delivers. The Energy Efficiency Rebates for Business (EERB) program offers up to $500,000 per site for qualifying equipment upgrades including high-efficiency boilers ($5-$9 per kBtuh), boiler economizers (up to $40,000), and steam trap surveys with repair. The Industrial STAR program, managed by Cascade Energy, covers food and beverage manufacturers specifically – providing both deemed measure rebates for standard equipment upgrades and custom-path incentives for more complex process efficiency improvements measured via NMEC methodology. For manufacturers with operations that extend to both gas and electricity intensive processes, the SoCal Gas program participation can be coordinated with SCE GRID-MAP enrollment through the same monitoring infrastructure – stacking gas and electricity incentives through a single deployment.

The monitoring-first approach maximises manufacturing gas costs rebate claims in two ways. First, it establishes metered baselines that enable custom-path rebate calculations rather than conservative deemed-savings estimates – generating larger incentive payments for the same equipment upgrades. Second, it identifies which equipment upgrades will generate the highest combined rebate and bill savings return before capital decisions are made, ensuring applications target the measures with the best economics rather than the most visible or convenient ones. As an approved SoCal Gas utility aggregator, Envigilance submits EERB applications directly through the aggregator relationship – eliminating the application overhead that prevents most manufacturing facilities from accessing program funds they have already paid for through their gas rates. See the SoCal Gas rebates guide for the full program breakdown and eligibility details. For cold storage manufacturers, the cold storage demand charges guide and the portfolio energy monitoring platform cover combined gas and electricity exposure. For operations with significant electricity loads, the manufacturing demand charges guide covers combined cost reduction.

MaaS: Monitoring Manufacturing Gas Costs Across Multi-Facility Portfolios

For manufacturing operators with multiple production sites – regional food processors, national chemical manufacturers, multi-site pharmaceutical or packaging operations – manufacturing gas costs monitoring at the portfolio level reveals something that site-level monitoring cannot: which facilities are performing well on gas efficiency and which are not, and why. A VP of Operations overseeing eight manufacturing sites across California and the Southwest has no visibility into combined monthly manufacturing gas costs by facility, no ranking of sites by therm-per-unit-of-output efficiency, and no signal when one site’s boiler plant begins drifting from its historical consumption pattern. Envigilance’s Monitoring as a Service platform provides exactly this cross-portfolio visibility – all sites in a single dashboard, manufacturing gas costs tracked at boiler and process equipment level, consumption anomalies flagged before they accumulate into bill surprises.

Under the MaaS model, all sensors, gateways, installation, and cloud infrastructure deploy from $750 per month per building with no capital outlay and 48-hour deployment. For a portfolio of eight manufacturing sites, the combined monitoring cost is $6,000 per month – against combined manufacturing gas costs that commonly run $200,000-$500,000 per month at this scale. A 10% waste reduction across the portfolio returns $20,000-$50,000 per month in direct gas bill savings, compounding automatically as prices rise. The platform also covers air quality monitoring for combustion-related employee exposure compliance and temperature monitoring for process control documentation and cold chain compliance. For California multi-site manufacturers, portfolio-level SoCal Gas aggregator enrollment means rebate applications coordinate across all qualifying sites simultaneously – maximising the combined EERB incentive claim while minimising the application management overhead at each individual site. The building energy management guide and monitoring cost guide cover outcomes and ROI across industrial building types.