Why Choose Calefa?
Calefa Oy is a Finnish energy solutions expert for the energy sector and industry, founded in 2013. The company provides AmbiHeat plants designed for carbon-free heat production, as well as AmbiSteam solutions that convert industrial waste heat into steam.
AmbiHeat® plants efficiently and carbon‑free utilize industrial waste heat and ambient energy sources. They can consist of Calefa’s own HotLevel heat pumps, electric boilers, and thermal energy storage units. Modular AmbiHeat® plants are always delivered as complete turnkey solutions tailored to customer needs.
The AmbiSteam solution is based on the SteamLevel® steam heat pump, which converts industrial waste heat into steam. As a complete system, the AmbiSteam solution can produce up to and even over 5 bars of steam with an excellent efficiency of COP 2–5. Modular AmbiSteam plants are likewise delivered as complete turnkey solutions according to customer requirements.
Calefa acts as a comprehensive lifecycle partner for its customers, also offering the CalefaCare maintenance and service program to optimize the performance of heat pump plants. The company is ISO 9001 and ISO 14001 certified and has strong in‑house design expertise at its headquarters in Hollola, as well as its own production facility in Ikaalinen.
Since 2013, Calefa has delivered nearly 200 systems and received a significant growth investment from Evli Private Capital in 2025 to accelerate its expansion.
What Services Does Calefa Offer?
- AmbiHeat® Modular Solutions for Heat Production
- Technical solutions include:
- Heat pump plants (350 kW – 30 MW)
- Electric boilers
- Thermal energy storage
- Utilization of industrial waste heat and ambient energy
- Affordable, CO₂‑free energy
- Heating and cooling applications
- Modular structure and fast installation for a wide range of sites
- 100% Finnish design and manufacturing
- Comprehensive lifecycle services
- An award‑winning concept recognized in the European Heat Pump Association (EHPA) DecarbIndustry series
- Technical solutions include:
- AmbiSteam Solutions
- Utilization of industrial waste heat
- Up to and over 5 bars of steam for industrial applications
- Carbon‑free steam production
- Modular structure and fast installation for various sites
- 100% Finnish design and manufacturing
- Comprehensive lifecycle services
- CalefaCare Maintenance and Service Program
- Scheduled preventive maintenance
- Remote monitoring and performance optimization
- Fault management and support
- Spare parts service
- Customized training and support services
- Regular reporting
- Continuous communication and improvement proposals
Target groups: Industrial facilities, energy companies, data centers
Quality and Compliance: ISO 9001, ISO 14001, equipment compliant with EU standards
10 Reasons to Choose Calefa
- 100% Finnish Design and Manufacturing
- Innovative heat pump technology and modular AmbiHeat and AmbiSteam concepts
- Nearly 200 delivered systems since 2013
- Heat pump plants for a wide range of capacities, for both heat and steam (350 kW – 30 MW), as well as electric boilers and thermal energy storage from a single supplier
- CO₂‑free heating and cooling solutions
- Significant cost savings
- ISO 9001 and ISO 14001 certified
- Tailored customer solutions
- Modular, turnkey deliveries
- Lifecycle partnership with CalefaCare
What Do Customers Say About Calefa?
"Cooperation with Calefa has worked excellently from the very beginning."
“We have been satisfied with the overall implementation. The AmbiHeat plant can even produce slightly more cooling capacity than initially expected.”
“Calefa is the first party we contact when it comes to future heat pump solutions as well.”
“The AmbiHeat system supplied by Calefa supports our journey toward sustainable energy production.”
“Finnish legislation is currently introducing the wastewater directive, which sets requirements for the energy neutrality of wastewater treatment plants. With the plant delivered by Calefa, we are one step ahead.”
“I see Calefa as a good, reliable, and highly competent partner. Our satisfaction is clearly reflected in the confidence to start new projects immediately after the previous one is completed. The cooperation continues with a smile.”
“Calefa’s maintenance service makes system operation easier and frees up resources for other maintenance tasks. I don’t want to experience daily operations without CalefaCare.”
Company Information
- Company name: Calefa Oy
- Industry: Industrial energy solutions, heat pump plants, utilization of industrial waste heat and ambient energy
- Legal form: Private limited company
- Founded: 2013
- Headquarters: Hollola, Finland
- Employees: Approx. 40
- Locations: Hollola (headquarters and production), Ikaalinen (production)
- Certifications: ISO 9001, ISO 14001
- Awards: EHPA Heat Pump City of the Year 2015, Climate Act of the Year 2016, Energy Innovation of the Year 2019, EHPA Award DecarbIndustry 2021, Entrepreneur of the Year in Hollola 2022, Energy Genius of the Year 2024, EHPA Heat Pump City of the Year 2025
- Main products and services: Carbon‑free heat production with AmbiHeat® plants, steam production from waste heat with AmbiSteam plants, CalefaCare maintenance and service solutions
- Website: https://calefa.fi/en/
- Visiting Address: Muovitie 1, 15860 Hollola, Finland
- Postal Address: P.O. Box 15, 15871 Hollola, Finland
- Social Media: https://www.linkedin.com/company/calefa-oy/