A factory replaces a gas-fired boiler with an electric heating system and its direct fuel consumption falls sharply. The sustainability result appears obvious: less combustion should mean lower emissions.
But the factory is now consuming more electricity. Production may also have changed. Steam pressure may be different, heat recovery may have improved, and electricity may come from a grid whose emissions profile varies by market. If management compares only the old gas bill with the new electricity bill, it may know what happened to energy purchasing without knowing what happened to total greenhouse-gas emissions.
Industrial heat electrification therefore needs to be treated as both an engineering project and a measurement project.
Why Industrial Heat Has Become an Important Decarbonisation Issue
Industrial energy discussions often focus on highly visible sectors such as steel and cement. Yet substantial heat demand also exists in food processing, beverages, textiles, paper, chemicals and other manufacturing operations.
The International Energy Agency has identified electrification of low-temperature heat and steam as one of the important opportunities for industrial decarbonisation. Its research covering China, ASEAN and other markets points to commercially available technologies including industrial heat pumps, electric boilers and resistance heating for many applications.
The opportunity is particularly relevant in Southeast Asia. The IEA estimates that around 35% of the region’s industrial energy demand is associated with low-temperature heat that could already be electrified using commercially available technology.
That does not mean every boiler should immediately be replaced. The correct technology depends on required temperature, steam conditions, operating hours, available waste heat, electricity prices, electrical infrastructure and the production process itself.
Electrification Changes Where Emissions Appear
One of the easiest mistakes is to treat electrification as the disappearance of emissions.
Under conventional corporate greenhouse-gas accounting, fossil fuel burned in equipment owned or controlled by a company normally contributes to direct Scope 1 emissions. Purchased electricity is accounted for separately under Scope 2.
Replacing a fuel-fired boiler with electric equipment can therefore produce two simultaneous changes:
- direct fuel consumption and associated Scope 1 emissions decline; and
- electricity consumption and associated Scope 2 emissions increase.
The environmental result depends on the magnitude of both changes.
A company should consequently avoid communicating only the Scope 1 reduction if the new electrical demand is material. The stronger comparison examines the relevant emissions boundary before and after the project using consistent accounting methods.
Start With Useful Heat, Not the Energy Bill
The most useful starting point is the service the equipment actually provides.
A boiler does not exist to consume natural gas. A heat pump does not exist to consume electricity. Both exist to deliver useful heat to a production process.
That means an electrification assessment should identify the relevant thermal output. Depending on the process, this might involve useful thermal energy, steam generation, steam pressure and temperature, hot-water output, drying duty or another measurable process requirement.
Without that information, management can easily compare two systems that were doing different amounts of work.
Consider a factory that consumes less energy after electrification but also produces 20% fewer tonnes of product. The new system may genuinely be more efficient, but the reduction in total consumption cannot be attributed entirely to the technology change. Conversely, a plant may consume more electricity after expansion while still achieving a significant reduction in energy or emissions per unit of useful output.
The Five-Layer Heat Transition Evidence Stack
A practical measurement system can be built around five layers.
1. Measure the thermal service delivered
Define what the heating system actually produces. Record the variables required to calculate or demonstrate useful thermal output, such as steam quantity, temperatures, pressures, operating hours or heat delivered to the process.
2. Measure every material energy input
Before conversion, retain reliable fuel-consumption information for the existing boiler or heating equipment. After conversion, separately meter electricity used by the new heating system where practical.
Do not rely solely on a whole-factory electricity bill if other major loads changed during the same period.
3. Preserve the operating context
Record production volume, product mix, operating hours, shutdowns and other variables that materially influence heat demand.
This allows management to distinguish a technology improvement from a reduction caused by lower output.
4. Calculate the emissions consequence
Compare the direct fuel emissions displaced with the emissions associated with the electricity consumed by the new equipment using the company’s applicable greenhouse-gas accounting methodology.
Where both location-based and market-based Scope 2 reporting apply, the treatment of electricity procurement should remain consistent with the company’s wider greenhouse-gas inventory.
5. Track operating and business performance
Decarbonisation equipment still has to run a factory.
Track maintenance, production interruptions, system availability, peak electrical demand, energy expenditure and product-quality effects alongside environmental metrics. A system that performs well in a design calculation but repeatedly interrupts production is not a successful operating project.
Heat Pumps and Electric Boilers Should Not Be Treated as the Same Technology
Electric boilers convert electricity into useful heat and can provide steam for industrial processes. Industrial heat pumps operate differently: they move heat from a lower-temperature source to a higher useful temperature and can therefore deliver significantly more useful thermal energy than the electrical energy used to drive the system.
The appropriate option depends heavily on temperature requirements and site conditions.
Recent IEA analysis indicates that large industrial heat pumps are established for many lower-temperature applications, while development is extending their usable temperature range. Electric boilers can serve higher-temperature steam requirements but their economics can be strongly influenced by electricity prices because electricity represents a large share of operating cost.
This is why a procurement comparison based only on equipment price is incomplete.
Efficiency Should Usually Come Before Electrification
Before replacing the heat source, a manufacturer should ask whether the process needs as much heat as it currently consumes.
Potential measures include:
- recovering usable waste heat;
- repairing steam and heat losses;
- improving insulation;
- optimising process controls;
- reducing unnecessary temperature levels;
- improving condensate recovery where relevant; and
- matching heat generation more closely to actual production demand.
The IEA specifically identifies efficiency and plant-level thermal optimisation as important precursors to electrification because lowering heat demand can reduce the capacity and investment required for the new electric system.
For a company preparing a business case, this creates an important sequencing principle: optimise the heat demand first, then size the electrification solution.
Do Not Ignore the Electrical Infrastructure
A thermal project can become an electrical-infrastructure project surprisingly quickly.
Engineering teams may need to assess transformer capacity, distribution equipment, connection limits, maximum demand, power quality and the availability of additional grid capacity.
The commercial calculation should also distinguish between energy charges and other electricity costs rather than assuming that the price per kilowatt-hour alone determines the business case.
Some industrial processes may also benefit from hybrid configurations, thermal storage or operating strategies that shift electricity consumption to more favourable periods, provided these arrangements do not compromise production requirements.
A Strong Claim Shows the Before-and-After Boundary
| Weak evidence | Stronger evidence |
|---|---|
| We installed an industrial heat pump. | The company documents the previous heating system, the new system and the production process served. |
| Gas use declined. | Fuel displaced and electricity added are both measured. |
| Our factory uses less energy. | Useful heat and production conditions are compared on a consistent basis. |
| Our heating is electric, so it is zero-emission. | Scope 1 and applicable Scope 2 consequences are calculated separately and communicated accurately. |
| The project reduces carbon. | The calculation method, period, boundaries, activity data and emission factors are retained for review. |
What Management Should Ask Before Approving the Project
- What temperature and thermal service does the production process actually require?
- Can heat demand be reduced before new equipment is sized?
- What fuel consumption will genuinely be displaced?
- How much additional electricity will the project require?
- Can the site’s electrical infrastructure support that load?
- How will useful thermal output be measured?
- How will production changes be separated from technology performance?
- How will Scope 1 and Scope 2 changes be calculated?
- What happens if electricity prices or production schedules change?
- What evidence will be retained after commissioning?
These questions turn a technology purchase into a defensible decarbonisation project.
When a Measured Improvement Becomes an Exceptional Achievement
Most industrial electrification projects should be judged primarily on operating performance, emissions reduction and business value. They do not need an award or record to be worthwhile.
Occasionally, however, a project may produce an unusually large and clearly measurable result whose scale can be independently verified. In that situation, an organisation may explore formal record recognition separately from its sustainability reporting or assurance processes.
Asia Record states that applicants should describe a measurable achievement, define how it was measured and provide supporting evidence for assessment. An Asia record application therefore depends on the same discipline that makes a strong industrial sustainability claim: clear boundaries, original records, documented measurements and evidence that another party can review.
Companies considering whether to apply for Asia Record should treat recognition as documentation of a specific achievement rather than certification of the company’s overall ESG performance. Environmental compliance, greenhouse-gas accounting and independent sustainability assurance remain separate matters.
Measure the Heat Transition Before Marketing It
Industrial electrification can be an important decarbonisation tool, particularly where manufacturers use low- and medium-temperature heat that can be supplied efficiently with commercially available electric technologies.
But the installation itself is not the result.
The result is the change in energy use, emissions and operating performance while delivering the required production service.
Manufacturers that meter those elements from the beginning can answer the question that matters most: not simply whether the factory electrified its heating system, but whether the change produced a measurable and defensible improvement.
