Glass Makers Build World's Largest Electric Furnace in Spain

Making windows might not sound glamorous, but Saint-Gobain and AGC just proved it can be revolutionary.

The two glass manufacturing giants are teaming up to build the world's largest electric furnace for flat glass production at Saint-Gobain's plant in Avilés, Spain. Construction starts in January 2027, with the furnace melting its first batch of glass by late summer.

This isn't just big. It's breakthrough big. The hybrid furnace will electrify 75% of the melting process, powered entirely by renewable energy contracted in Spain. That's a massive leap for an industry that has relied on gas-fired furnaces for generations.

The numbers tell an inspiring story. Once running, the furnace will avoid 80,000 tons of carbon emissions every year while slashing natural gas use by 80%. That's roughly 265 gigawatt hours of gas saved annually, enough to power thousands of homes.

The project builds on success from a smaller pilot furnace the companies have operated in the Czech Republic since 2023. That test proved electric technology could work for glass production. Now they're scaling it up to industrial size.

The Ripple Effect

This furnace does more than reduce emissions at one factory. It creates a blueprint for decarbonizing an entire industry.

The glass produced will meet the highest international standards for low-carbon building materials. That means architects and builders across Europe will have access to sustainable glass for homes, offices, and infrastructure projects without compromising quality.

Both companies are racing toward net zero emissions by 2050, and this project puts them years ahead. Saint-Gobain already launched its ultra-low-carbon ORAÉ glass line, giving customers greener options today.

The technology transfer matters too. What works in Avilés can be replicated at glass plants worldwide, multiplying the climate impact far beyond Spain.

The European Union's Innovation Fund is backing the project financially, recognizing its potential to transform heavy industry. When governments, manufacturers, and clean energy suppliers work together, breakthrough moments like this become possible.

One factory in Spain is proving that even the oldest, hottest industrial processes can run on clean electricity.