Myth-busting Industrial heat & high-temp electrification: separating hype from reality

Industrial heat accounts for approximately 20% of global carbon dioxide emissions, yet it remains one of the least understood sectors in the energy transition. Temperatures above 400 degrees Celsius are required for producing steel, cement, glass, ceramics, and chemicals, and the conventional wisdom holds that these processes are fundamentally incompatible with electrification. That conventional wisdom is increasingly wrong. A new generation of electric heating technologies is demonstrating commercial viability at temperatures exceeding 1,500 degrees Celsius, but persistent myths about cost, feasibility, and scalability continue to slow adoption. This analysis examines the most damaging misconceptions and presents the evidence that should be shaping investment and policy decisions.

Why It Matters

Industrial process heat consumes roughly 50% of all industrial energy globally, equivalent to approximately 21% of total global final energy demand. The International Energy Agency estimates that decarbonizing industrial heat is essential for any pathway to net-zero emissions by 2050. In the European Union, where the Emissions Trading System (ETS) carbon price has stabilized between 60 and 90 euros per tonne since 2023, the economic calculus for switching from fossil-fueled furnaces to electric alternatives is shifting rapidly.

The EU's Carbon Border Adjustment Mechanism (CBAM), which entered its transitional phase in October 2023 and will impose full financial obligations from January 2026, adds further urgency. Steel, cement, aluminum, fertilizers, electricity, and hydrogen imported into the EU will carry carbon costs equivalent to domestic producers' ETS exposure. For EU manufacturers, investing in electrified heat processes now creates both compliance advantages and competitive positioning against carbon-intensive imports.

The investment landscape reflects growing confidence. BloombergNEF reported $1.8 billion in venture capital and project finance for industrial heat electrification companies in 2024, up from $420 million in 2022. The US Department of Energy's Industrial Decarbonization Roadmap identifies electrification as the highest-priority pathway for reducing emissions from the industrial sector. Yet despite this momentum, adoption remains far below potential. Understanding why requires confronting the myths that distort decision-making.

Key Concepts

Industrial Process Heat spans a wide temperature range from below 100 degrees Celsius (food processing, drying) through medium temperatures of 100 to 400 degrees Celsius (chemical processing, paper production) to high temperatures above 400 degrees Celsius (steelmaking at 1,600 degrees Celsius, cement clinker production at 1,450 degrees Celsius, glass melting at 1,500 degrees Celsius). Each temperature range presents different electrification challenges and technology readiness levels.

Electric Arc Furnaces (EAFs) use electrical energy to melt scrap steel or direct reduced iron (DRI) at temperatures exceeding 1,600 degrees Celsius. EAFs already produce approximately 30% of global steel, demonstrating that ultra-high-temperature electrification is commercially proven at massive scale. The transition pathway for primary steelmaking involves pairing green hydrogen-based DRI with EAFs, a combination that eliminates the blast furnace entirely.

Industrial Heat Pumps use thermodynamic cycles to upgrade low-grade waste heat to useful process temperatures, achieving coefficients of performance (COP) of 2.5 to 5.0, meaning they deliver 2.5 to 5 units of heat energy for every unit of electrical energy consumed. Modern high-temperature heat pumps now reach output temperatures of 150 to 200 degrees Celsius, with emerging systems targeting 250 degrees Celsius. This technology is most applicable to food, beverage, pharmaceutical, and chemical processing.

Electromagnetic Heating encompasses induction heating, microwave heating, infrared radiation, and plasma heating. These technologies convert electrical energy directly into heat within the material being processed, often with conversion efficiencies exceeding 90%. Induction heating is already standard in metal processing, while microwave and plasma technologies are emerging for mineral processing and chemical synthesis.

Resistance Heating and Electric Kilns use electrical current passed through resistive elements to generate heat at temperatures up to 1,800 degrees Celsius. Electric kilns are standard in ceramics and advanced materials production. Emerging joule heating technologies using silicon carbide or molybdenum disilicide elements are extending resistance heating into temperature ranges previously dominated by combustion.

Myths vs. Reality

Myth 1: Electrification cannot reach the temperatures needed for heavy industry

Reality: This is the most persistent and most incorrect myth in industrial decarbonization. Electric arc furnaces routinely operate above 1,600 degrees Celsius and have done so commercially for over 60 years. Plasma torches reach temperatures exceeding 10,000 degrees Celsius. Induction furnaces operate at 1,800 degrees Celsius for specialty metals production. The startup Electra (formerly Electra Steel) demonstrated iron ore reduction using electrochemistry at ambient pressure and temperatures below 100 degrees Celsius, bypassing the high-temperature requirement entirely. Boston Metal's molten oxide electrolysis process produces steel at 1,600 degrees Celsius using electricity alone, with no coal or natural gas inputs. The question is not whether electricity can generate sufficient temperatures but whether the economics and process integration challenges can be resolved at scale.

Myth 2: Electric industrial heating is prohibitively expensive compared to natural gas

Reality: Cost comparisons between electric and gas-fired heating that ignore carbon pricing, energy efficiency differences, and total cost of ownership produce misleading conclusions. Natural gas furnaces typically operate at thermal efficiencies of 40 to 65%, meaning that 35 to 60% of fuel energy is lost as waste heat. Electric heating systems commonly achieve 85 to 95% efficiency, meaning substantially less input energy is required per unit of useful heat delivered. At EU electricity prices of 80 to 120 euros per megawatt-hour and natural gas prices of 30 to 50 euros per megawatt-hour, the raw energy cost gap narrows significantly when efficiency differences are accounted for. When carbon costs of 60 to 90 euros per tonne of CO2 are factored in, electric heating reaches cost parity or advantage for many medium-temperature applications today.

Rondo Energy, which manufactures industrial heat batteries that store electricity as thermal energy at 1,500 degrees Celsius, reports that its systems deliver heat at costs competitive with natural gas in regions with industrial electricity rates below $40 per megawatt-hour. Their installations at Calgren Renewables in California and partnerships with Siam Cement Group in Thailand demonstrate commercial deployment at costs that undercut fossil alternatives when clean electricity is available at scale.

Myth 3: The electrical grid cannot handle the load if industry electrifies

Reality: This myth conflates theoretical peak demand scenarios with the practical reality of phased deployment. Full electrification of all industrial heat in the EU would require approximately 1,200 terawatt-hours of additional electricity generation annually, roughly doubling current EU electricity production. However, no credible pathway envisions instantaneous, total electrification. The IEA's net-zero scenario projects that industrial heat electrification will proceed over 25 years, with annual incremental electricity demand growth of 2 to 4% above baseline. Grid operators routinely plan for demand growth at this scale. Moreover, industrial heat loads are often flexible: thermal storage enables factories to consume electricity during periods of high renewable generation and low grid prices, actually supporting grid stability rather than undermining it. Rondo Energy's heat batteries and Antora Energy's solid-state thermal storage systems are specifically designed to absorb renewable electricity surpluses and deliver continuous industrial heat.

Myth 4: Hydrogen is always the better option for high-temperature industrial heat

Reality: Hydrogen and electrification are complementary pathways, not competitors, and the optimal choice depends on the specific application. For steelmaking, green hydrogen plays an essential role as a chemical reductant that strips oxygen from iron ore, a function that electricity alone cannot perform in conventional blast furnace or shaft furnace configurations. SSAB's HYBRIT project in Sweden and H2 Green Steel's Boden facility demonstrate this pathway. However, for applications that require only thermal energy, not chemical reduction, direct electrification is nearly always more efficient. Producing green hydrogen through electrolysis, transporting it, and combusting it in a furnace involves cumulative energy losses of 55 to 70%, delivering only 30 to 45% of the original electrical energy as useful heat. Direct electric heating delivers 85 to 95% of input energy as heat. For cement kilns, glass furnaces, and ceramic kilns, direct electrification avoids the massive efficiency penalty of the hydrogen intermediary.

Myth 5: Existing factories cannot be retrofitted; only greenfield plants can electrify

Reality: While greenfield electrification is simpler, retrofit pathways exist and are being demonstrated commercially. Hybrid approaches that combine existing gas-fired systems with electric heating elements enable gradual transition without full plant replacement. Nibe Industrier, the Swedish heat pump manufacturer, has deployed industrial heat pump retrofits across European food processing and chemical plants, reducing fossil fuel consumption by 40 to 70% without replacing primary process equipment. In glass production, Fives Group has developed hybrid electric-gas furnaces that can operate on 20 to 80% electricity, allowing manufacturers to increase the electric fraction as grid decarbonization progresses and carbon prices rise. TATA Steel's IJmuiden plant in the Netherlands is piloting hybrid steelmaking that combines hydrogen-based DRI with existing infrastructure, demonstrating that brownfield transition is technically viable for even the most carbon-intensive industries.

Myth 6: Industrial heat electrification is only relevant for small or niche applications

Reality: The scale of existing electrified industrial heat is already enormous and growing. Global electric arc furnace steelmaking produced approximately 550 million tonnes of crude steel in 2024, representing roughly 30% of global steel production. Aluminum smelting, which uses electrolysis at 950 degrees Celsius, accounts for essentially 100% of primary aluminum production worldwide, approximately 70 million tonnes annually. Electric induction furnaces are standard in foundries, forging, and heat treatment operations across automotive, aerospace, and heavy machinery manufacturing. These are not niche applications. They represent trillions of dollars in annual output and demonstrate that industrial-scale electrification of high-temperature processes is not a future aspiration but a present reality.

Industrial Heat Electrification KPIs: Benchmark Ranges

Metric	Below Average	Average	Above Average	Top Quartile
Electric Heating Efficiency	<80%	80-88%	88-93%	>93%
Emissions Reduction vs. Gas	<40%	40-65%	65-85%	>85%
Retrofit Cost Premium vs. Gas	>80%	40-80%	15-40%	<15%
Payback Period (with carbon pricing)	>10 years	6-10 years	3-6 years	<3 years
Operating Temperature Achieved	<400C	400-1000C	1000-1500C	>1500C
Capacity Factor with Thermal Storage	<50%	50-70%	70-90%	>90%

What's Working

Thermal Energy Storage for Industrial Heat

Rondo Energy's heat batteries store renewable electricity as thermal energy in refractory materials at temperatures up to 1,500 degrees Celsius, then deliver continuous industrial heat as hot air or steam. Their installation at Calgren Renewables in California's Central Valley provides 24/7 process heat for ethanol production, replacing natural gas consumption entirely. The system charges during periods of low-cost solar electricity and discharges continuously, demonstrating that intermittent renewables can power continuous industrial processes. Rondo raised $291 million in 2024 and has announced partnerships across cement, food processing, and chemicals.

High-Temperature Heat Pumps in European Industry

Turboden, a Mitsubishi Heavy Industries subsidiary, has deployed high-temperature heat pumps delivering process steam at 150 degrees Celsius across pulp and paper, chemical, and food processing facilities in Europe. Their installations achieve COPs of 3.0 to 4.5, meaning each megawatt-hour of electricity input produces 3 to 4.5 megawatt-hours of useful heat. At EU industrial electricity prices, this makes electric heat pumps 20 to 40% cheaper than natural gas boilers when carbon costs are included.

Electric Melting in Glass Production

Glass manufacturers including O-I Glass and Ardagh Group are deploying hybrid electric melting furnaces that replace 30 to 80% of natural gas consumption with electrical heating. O-I Glass's Holzminden plant in Germany operates an all-electric melting furnace producing 60 tonnes of container glass per day, demonstrating that full electrification of glass production at commercial scale is technically viable. The technology reduces CO2 emissions by 50 to 80% compared to conventional gas-fired furnaces.

Action Checklist

• Audit current process heat requirements by temperature range, identifying which applications fall below 200 degrees Celsius (heat pump candidates), 200 to 1,000 degrees Celsius (resistance/induction heating candidates), and above 1,000 degrees Celsius (arc/plasma candidates)
• Calculate total cost of ownership for electric alternatives including carbon pricing trajectory, energy efficiency gains, and reduced maintenance
• Evaluate thermal energy storage solutions that enable flexible electricity procurement and 24/7 heat delivery from variable renewable sources
• Investigate hybrid retrofit options that enable gradual electrification of existing gas-fired equipment without full plant replacement
• Assess grid connection capacity and lead times for increased electrical load at manufacturing facilities
• Model scenarios under rising EU ETS carbon prices (projected 100 to 150 euros per tonne by 2030) to identify when electrification reaches clear economic advantage for each process
• Engage equipment suppliers on electric or hybrid furnace options for upcoming capital replacement cycles
• Apply for relevant EU Innovation Fund, Horizon Europe, or national industrial decarbonization grants that subsidize electrification capital costs

FAQ

Q: At what carbon price does industrial heat electrification become economically competitive with natural gas? A: The breakeven carbon price depends on local electricity and gas prices, process efficiency, and capital costs. In the EU at current electricity rates of 80 to 120 euros per megawatt-hour, medium-temperature applications (below 400 degrees Celsius) using heat pumps reach parity at carbon prices of 40 to 60 euros per tonne, well below current ETS prices. High-temperature applications (above 1,000 degrees Celsius) using direct resistance or arc heating require carbon prices of 80 to 120 euros per tonne for parity, which the market is approaching. Regions with lower electricity costs (Scandinavia, Iberian Peninsula, parts of France) already see parity for most applications.

Q: How long does it take to retrofit an existing industrial facility for electric heating? A: Hybrid retrofit installations that add electric heating capacity alongside existing gas systems typically require 12 to 24 months from engineering design through commissioning. Full conversion to electric heating for a major industrial facility (steel, cement, glass) requires 3 to 5 years including environmental permitting, grid connection upgrades, and equipment installation. Most companies adopt phased approaches, electrifying lower-temperature auxiliary systems first and progressing to core process heating during planned capital replacement cycles.

Q: What is the role of thermal energy storage in industrial heat electrification? A: Thermal energy storage decouples electricity consumption from heat delivery, solving the intermittency challenge that industrial facilities face when relying on renewable electricity. Systems from Rondo Energy, Antora Energy, and Kraftblock store cheap surplus renewable electricity as heat in refractory materials, molten salts, or solid media, then deliver continuous process heat for 8 to 24 hours. This enables factories to purchase electricity during the cheapest 6 to 10 hours of the day while maintaining 24/7 heat supply, reducing effective energy costs by 30 to 50% compared to flat electricity procurement.

Q: Which industrial sectors will electrify fastest? A: Sectors with process heat requirements below 250 degrees Celsius (food and beverage, pharmaceuticals, pulp and paper) are electrifying fastest because high-temperature heat pumps are commercially proven and cost-competitive today. Glass manufacturing is next, with hybrid and all-electric melting furnaces already in commercial operation. Chemicals will follow as electric crackers and reactors mature. Steel and cement, which require both high temperatures and chemical reduction, will electrify last and will rely on a combination of green hydrogen (for reduction chemistry) and electric heating (for thermal energy) rather than electrification alone.

Q: Are there sufficient critical minerals for manufacturing electric heating equipment at scale? A: Unlike battery electric vehicles, which require large quantities of lithium, cobalt, and nickel, most electric heating technologies rely on abundant materials. Resistance heating elements use silicon carbide, graphite, or iron-chromium-aluminum alloys. Induction heating uses copper coils. Heat pumps use standard refrigerants and compressor components. The primary supply chain constraint is not materials but manufacturing capacity for specialized equipment, which is expanding rapidly as demand grows. Thermal energy storage systems use common refractory materials (alumina, magnesia, steel) with no critical mineral bottlenecks.

Sources

• International Energy Agency. (2025). Net Zero by 2050: Industrial Heat Decarbonization Pathways Update. Paris: IEA Publications.
• BloombergNEF. (2025). Industrial Heat Electrification: Investment Trends and Technology Readiness, Annual Report. New York: Bloomberg LP.
• European Commission. (2025). EU Emissions Trading System: Carbon Price Trends and Industrial Competitiveness Assessment. Brussels: European Commission.
• Agora Energiewende. (2025). Electrifying EU Industry: Technology Pathways, Cost Curves, and Policy Requirements. Berlin: Agora Energiewende.
• US Department of Energy. (2025). Industrial Decarbonization Roadmap: Electrification Pathway Analysis. Washington, DC: DOE Office of Energy Efficiency and Renewable Energy.
• McKinsey & Company. (2025). The Green Factory: Industrial Heat Electrification Economics by Sector and Region. McKinsey Sustainability Practice.
• Lawrence Berkeley National Laboratory. (2024). High-Temperature Heat Pump Performance in Industrial Applications: Field Data Analysis. Berkeley, CA: LBNL.