Energy in Whisky Production: Fuels, Heat and Renewables

At Glentauchers, vapour leaves the pot still at about 86°C. Distillation needs about 106°C. Closing that temperature gap allows heat to be used again, rather than lost, and puts one of whisky's central energy challenges into sharp focus.[6] Across the industry, the approach is simple to state: use less energy, recover heat and replace fossil fuels. The results need a closer look, from measured savings to forecasts, renewable electricity supplies and carbon neutral claims.[11][12]

Energy in whisky production: reduce, recover, replace

“Reduce, Recover, Replace” is the sequence set out in the Irish Whiskey Association's May 2022 roadmap. It starts with using less. The roadmap measures energy intensity in kilowatt-hours per litre of pure alcohol, written as kWh/LPA, tying energy consumption to the amount of alcohol produced. That makes the figure more useful than a total with no production context.[12]

The stills account for a substantial share of demand in the published examples. At GlenAllachie, Billy Walker links around 60% of the distillery's total energy consumption to its pot stills. That figure describes GlenAllachie, rather than a standard share for every distillery, but it makes clear why still heating commands attention.[7]

For the wider picture, including issues beyond energy, start with sustainability in whisky. Here, three questions guide the story: what heat does a process need, how much can be recovered, and what supplies the remainder?

Recovering heat before replacing fuel

Glentauchers recovers heat through mechanical vapour recompression, or MVR. Electricity raises the temperature of the vapour so its heat can drive distillation again. Rather than simply changing the fuel beneath a boiler, the system makes further use of heat already in the process.[6]

Trade reporting of Chivas Brothers' case study gives a 48% reduction in total energy use and a 53% reduction in energy-related carbon emissions. The system's reported coefficient of performance is 10 to 12. These are company-reported results, without independent verification established in the sources checked, and the same account says Glentauchers still relies on fossil-fuelled boilers.[6]

At GlenAllachie, the figures describe an installation's expected performance. Trade reporting from July 2025 details MVR for two 21,000 litre wash stills, with design energy savings of over 90% and expected annual savings of 367 tonnes CO2e. Those are design and forecast figures, distinct from Glentauchers' reported results. Keeping that distinction clear allows both projects to be understood on their own terms.[7]

Replacing fossil fuels: electricity, hydrogen and residues

Electricity, hydrogen, biomass and waste all featured in the UK Government's Green Distilleries Competition, published on 16 September 2020. It supported 17 feasibility studies and three demonstration projects; both phases are closed to applicants. The project descriptions capture several routes being investigated, with forecast savings and proposed trials at different stages of development.[4][5]

Electrification is central to Diageo's account of its Lebanon, Kentucky distillery, opened on 28 September 2021. The company says electrode boilers use 100% renewable electricity, with no fossil fuels for production. Its carbon neutral claim follows PAS 2060, with certification by Jacobs Engineering Group, and requires residual offsets, including for emergency backup power.[11]

The distinction is important. Renewable electricity describes the electricity supply; carbon neutrality depends on the claim's boundary and the treatment of remaining emissions. Neither term alone means fossil fuel use or emissions have disappeared. At Lebanon, Diageo distinguishes production energy from residual emissions rather than describing the entire site as emitting nothing.[11]

The Irish roadmap records three further approaches: on-site wind and hydro at Rademon Estate, up to 30% lower energy use at Bushmills' new malt distillery, and 100% renewable biogas at Powerscourt. Each answers a different question about energy supply or efficiency. Together they show the variety of approaches, rather than providing a ranking of the three distilleries.[12]

Making energy from distillery leftovers

What leaves the production process can become part of its energy supply. The Cameronbridge scheme described in 2013 combined anaerobic digestion and biomass conversion of distillery effluent. It was expected to generate 80% of the site's electricity and 98% of its steam, with a hoped-for annual reduction of 56,000 tonnes CO2. These were the scheme's published expectations, rather than established achievements.[8]

Glenfiddich's July 2021 announcement takes the story from the still house to the road. The producer says its trucks run on biogas made by anaerobic digestion of its own draff, or spent grain, and pot ale, a liquid distillery residue. It claims a reduction of over 95% in CO2e against diesel and displacement of up to 250 tonnes CO2e per truck each year.[9]

William Grant & Sons also says the technology generates on-site power at Girvan. These uses connect energy supply with the handling of production leftovers, explored separately in draff and pot ale. For the trucks, the comparison remains a reduction against diesel, rather than zero emissions.[9]

What the industry figures actually show

Scotch whisky's energy mix changed markedly between 2008 and 2020. The Scotch Whisky Association's published results report a 53% reduction in greenhouse gas emissions from the 2008 baseline. Non-fossil sources supplied 39% of energy in 2020, up from 3% in 2008 and above the 2020 target of 20%. Distillery energy efficiency improved by 13%, against a target of 7.6%.[3]

These are substantial gains, not a picture of an industry already powered entirely by renewables. The SWA's wording, “non-fossil”, matters, as does the reporting year. The 39% figure records the energy mix in 2020; it does not measure the mix in November 2026.[3]

The targets have distinct boundaries too. The SWA's January 2021 strategy set net zero emissions in the industry's own operations by 2040. Its wider sustainability account gives a target of net zero across all scopes by 2045. The Irish Whiskey Association's May 2022 roadmap commits to net zero by 2050 or sooner, with interim reductions by 2030 and 2040.[1][2][12]

The SWA says some of the solutions and technology needed to succeed do not yet exist. That is the essential context for these dates: they are industry commitments, with technical steps still to be developed and demonstrated.[1]

Why the distillery is not the whole footprint

Most of the industry's emissions sit beyond its own operations. The SWA says Scope 3, its supply-chain emissions, represents over 80% of the industry's emissions. The Irish Whiskey Association's roadmap offers a separate breakdown: malt and grain account for 38%, distilling and bottling 26%, packaging 16%, transport 15% and other activities 5%. These are two industry accounts, not interchangeable slices of one dataset.[1][12]

That wider view changes how a distillery energy project should be read. Recovering heat or replacing fuel can deliver a substantial improvement at a site, while leaving other parts of a whisky's footprint to address. In the Irish roadmap, malt and grain account for more emissions than distilling and bottling. A clear account of energy progress keeps that context in view, without asking a site-level achievement to stand for the whole product.[12]

How to read an energy claim

Four checks make announcements easier to compare. Start with the measure, establish the boundary, separate results from expectations and keep the source attached. A forecast, a statement about fuel and an emissions result each tell a different part of the story.

1. What is being measured? Total energy use, energy per litre of pure alcohol and energy-related carbon emissions are different measures. Glentauchers' reported 48% energy reduction and 53% emissions reduction show why each number needs its description. Without it, a comparison can lose its meaning.[6][12]
2. Where does the boundary fall? Check whether the claim covers still heating, all site energy, transport or the supply chain. Glenfiddich's truck announcement and the SWA's own-operations target concern different activities, so their boundaries belong alongside their figures.[2][9]
3. Is it a result or a forecast? Separate reported performance from design expectations. GlenAllachie's expected annual savings and Cameronbridge's anticipated steam supply describe intended outcomes, rather than measured results in the cited accounts.[7][8]
4. Who is making the claim? A producer's case study records what that producer reports. Keep the attribution, reporting date and any offsets visible, as in Diageo's account of Lebanon. Those details are part of understanding the claim, not incidental qualifications.[11]

Where to go next

• Water Use in Distilling: how water fits alongside the energy question.
• Climate Change and Barley: Can Whisky's Grain Adapt?: the agricultural part of the wider sustainability picture.
• Lightweight Glass, Packaging and Greenwashing: how to examine claims beyond the distillery.

Sources

[1] Scotch Whisky Association. Sustainability in the Scotch Whisky Industry. Undated web page, version recorded in the supplied fact sheet, November 2026.
https://www.scotch-whisky.org.uk/industry-insights/sustainability/

[2] Scotch Whisky Association. Scotch Whisky Commits to Reach Net-Zero by 2040 with Launch of New Sustainability Strategy. 25 January 2021.
https://www.scotch-whisky.org.uk/newsroom/scotch-whisky-commits-to-reach-net-zero-by-2040-with-launch-of-new-sustainability-strategy/

[3] Scotch Whisky Association. Sustainability numbers add up for green whisky strategy. Results covering 2008 to 2020, version recorded in the supplied fact sheet, November 2026.
https://www.scotch-whisky.org.uk/newsroom/sustainability-numbers-add-up-for-green-whisky-strategy/

[4] GOV.UK, Department for Energy Security and Net Zero. Green Distilleries Competition (closed to applications). First published 16 September 2020, version recorded in the supplied fact sheet, November 2026.
https://www.gov.uk/government/publications/green-distilleries-competition

[5] GOV.UK. Green Distilleries Competition: Phase 2 (Demonstration) successful projects. Version recorded in the supplied fact sheet, November 2026.
https://www.gov.uk/government/publications/green-distilleries-competition/green-distilleries-competition-phase-2-demonstration-successful-projects

[6] Canary Media. How heat pumps can turn wasted energy into low-carbon whisky. Trade reporting of the Glentauchers case study, version recorded in the supplied fact sheet, November 2026.
https://www.canarymedia.com/articles/clean-industry/how-heat-pumps-can-turn-wasted-energy-into-low-carbon-whisky

[7] The Drinks Business. GlenAllachie installs next-gen energy tech in distillation overhaul. July 2025.
https://www.thedrinksbusiness.com/2025/07/glenallachie-installs-next-gen-energy-tech-in-distillation-overhaul/

[8] Food Manufacture. Diageo goes green with bio-energy plant. May 2013.
https://www.foodmanufacture.co.uk/Article/2013/05/01/Raft-of-energy-measures-at-Scotland-s-largest-grain-distillery/

[9] Glenfiddich. Glenfiddich fuels transport fleet with breakthrough green biogas made from its own whisky residues. Producer's account, 27 July 2021.
https://www.glenfiddich.com/general/sustainability-press-release/

[11] Diageo. Diageo opens its first carbon-neutral whiskey distillery in North America. Producer's account, 28 September 2021.
https://www.diageo.com/en/news-and-media/press-releases/2021/diageo-opens-its-first-carbon-neutral-whiskey-distillery-in-north-america

[12] Drinks Ireland, Irish Whiskey Association. Sustainable Together: Sustainability Roadmap 2022. May 2022.
https://www.ibec.ie/drinksireland/-/media/documents/drinks-ireland-new-website/irish-whiskey/iwa-sustainability-roadmap-2022.pdf

This desk-researched article uses the supplied verified fact sheet, distinguishing industry reporting, government project descriptions, trade reporting and producers' own accounts.

Last checked: November 2026