Good for you.
Great for the planet.
Turn yesterday’s coffee into today’s heat with our coffee logs.
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Preorder is sold out – join the waiting list to get 25% off from the next batch!
Coffee log - effortless heating from the circular economy
At Paahtu, we give used coffee grounds a new life. We collect them from local businesses and transform them into coffee logs.
Our coffee logs burn hotter, longer, and more evenly than traditional wood, making heating your fireplace or sauna easier and more efficient.
This is the power of the circular economy in action. We don’t cut down trees; we utilize coffee grounds that would otherwise go to the waste.
Try Coffee Log—the Roasters and Nature Thank You!
Why use Kahviklapi instead of regular firewood?
Burns longer
Kahviklapi burns almost twice as long as birch wood.
Burns hotter
Delivers efficient heat with 45% higher heat value than birch.
Easy to carry
Easy to transport and perfect for cabins, saunas, or hot tubs.
Compact
Takes 40% less storage space than regular firewood.
Proudly in partnership with
From coffee waste to coffee logs – Silja Line joins our coffee collection network.
Now, we’re inviting cafés, restaurants, and other businesses to join our network.
Check your company's potential to participate in the circular economy.
Honored as an Award-Winning Startup
A Finnish innovation
Kahviklapi is more than a product — it’s a symbol of what we can build when communities, universities, and innovators work together.
Developed through collaborative efforts in Finland’s thriving startup ecosystem.
Join us in protecting Finland's forests
Finland is struggling to meet its 2030 sustainability goals, and one of the reasons for this is the decline in biodiversity, heavily impacted by deforestation. Through our efforts, we hope to promote a more sustainable future and preserve nature for future generations.
Our impact at a glance
Turning coffee waste into efficient energy – one cup at a time
