About us
We believe energy consumption should be responsible, cost-effective and intelligent. When the solution calls for technical excellence, practical delivery capability and full-scope responsibility, Calefa is the partner to turn to.
Calefa is a Finnish energy technology company and turnkey partner for energy companies, industry and large property operators, delivering advanced solutions for utilizing ambient energy, waste heat and electric heat production.
We design, manufacture and deliver large-scale energy systems where efficiency, sustainability and operational reliability go hand in hand.
Calefa in figures
- Founded in 2013
- Head office in Hollola, in-house production in Ikaalinen
- Revenue of EUR 12.5 million in 2025
- Employs approximately 30 energy sector professionals
- Approximately 200 energy systems utilizing waste heat and ambient energy delivered since 2013
- Solution sizes range from approximately 350 kW to over 30 MW
- 100% Finnish engineering and manufacturing
- ISO 9001 and ISO 14001 certified operations
Energy solutions built on environmental performance
Calefa develops advanced heat pump and energy solutions that enable thermal energy to be recovered, upgraded and reused efficiently. Our portfolio includes modular AmbiHeat heat pump plants, AmbiSteam steam solutions and retrofit implementations that make it possible to integrate recovered waste heat into existing energy and production processes.
We deliver complete systems on a turnkey basis and take responsibility for ensuring that each solution performs reliably in real operating conditions and according to the customer’s needs.
Who are our solutions designed for?
Our solutions are designed for energy companies, industrial operators and large property owners that want to reduce emissions, improve energy efficiency and increase production flexibility with future-proof energy infrastructure.
Typical applications include district and local heating networks, industrial processes, steam production, process cooling and sites where waste heat and ambient energy can be harnessed as part of a high-performing overall energy solution.
Industrial steam production from waste heat among the first in Europe –
Download the AmbSteam® brochure and read more!
Take a step towards non-combustion energy production with
leading technology – Download the AmbiHeat brochure.
The Calefa story
Our story began with seeing the bigger picture.
Over the years, we took part in numerous project, design and procurement meetings in the energy sector. We knew that building a high-performing energy system is not merely a technical purchase, but a strategic whole in which every component must work together.
Yet we saw how design, implementation and, above all, responsibility were too often fragmented across too many parties, leaving the customer to carry the operational and commercial risk.
We decided to make the energy transition easier to implement.
We founded Calefa Oy to provide customers with complete solutions where design, implementation and long-term performance are brought together under one responsible partner. This enables us to deliver energy systems in which efficiency, reliability and low emissions are designed to work as one.
Over the years, Calefa has grown into a Finnish forerunner in energy infrastructure renewal, with a mission to help energy companies, industry and large property operators move towards more efficient and lower-emission heat production. Our operations are built on strong technological expertise, Finnish manufacturing and proven capability to execute demanding energy systems in a controlled way from concept to operation.
Today, Calefa is known as a partner that builds robust, scalable and future-proof energy solutions for its customers in Finland and beyond. For us, an energy system is a long-term investment that must create value far into the future. That is why every project combines strategic insight, practical delivery capability and responsibility for ensuring that the complete solution performs in operation.
Quality, responsibility and long-term development
Our quality and environmental management systems are certified, and our ISO 9001 and ISO 14001 certifications support continuous improvement across our operations. We develop solutions that help customers reduce combustion-based energy production, cut emissions permanently and strengthen long-term competitiveness.
At the same time, we hold on to what has mattered to us from the beginning: an energy solution must perform in practice, not only on paper.
Both the ISO 9001 and ISO 14001 certificates have been granted to Calefa by Bureau Veritas.
Our ongoing development projects
Through the project, Calefa aims to transition towards the use of natural refrigerants in industrial heat pumps by replacing current HFC and HFO refrigerants. This development step reduces climate impacts in heat pump technology and supports the EU’s environmental objectives.
Funding: Co-funded by the European Union from the Renewing and Competent Finland 2021–2027 structural funds programme.
The project focuses on developing heat pump performance and quality assurance through a dedicated test operation station. Advanced testing methods can improve energy efficiency, reduce emissions and ensure product reliability before market launch.
The project supports sustainable development, strengthens the local business ecosystem and creates new opportunities in technology, research and production. Its impacts extend to both Finland and international markets by supporting competitive and environmentally responsible heat pump solutions. At the same time, it promotes the circular economy, material efficiency and a sustainable energy economy.
Funding: Co-funded by the European Union from the Renewing and Competent Finland 2021–2027 structural funds programme.
At Calefa, we believe that the energy solutions of the future are built on environmental performance, technical excellence and full-scope responsibility. That is why we deliver complete solutions where advanced technology, operational reliability and the customer’s business needs come together. When an energy solution must deliver both measurable performance and long-term responsibility, Calefa is the partner that takes responsibility for the whole.