Climate-Caring Energy Solutions
Yes – heat can be produced without combustion, with zero emissions and at low cost. Modular AmbiHeat® and AmbiSteam® plants are changing the world.
AmbiHeat, Electrified Heat Production | Electrified Heat Production Is Rapidly Gaining Ground – Flexible Solutions Respond to Market Changes
Energy efficiency | Mäkelä Alu’s sustainability journey with Calefa
Heat pumps, natural refrigerant | Calefa Smoothly Integrates Natural Refrigerants into Heat Pump Technology
Calefa | Calefa Continued Its Strong Growth in 2025
AmbiSteam, SteamLevel | New Opportunities for Industrial Waste Heat Utilization with the AmbiSteam solution
AmbiSteam | Full Steam Ahead: Calefa Oy launches a waste heat-powered steam heat pump
Calefa | Calefa Oy’s Heat Pump Plant for Savon Voima wins Heat Pump City of the Year Award
Topical | Energy company smokestacks fell silent in four Finnish towns over the summer
AmbiHeat | MinersLoop Doubles the District Heat Production at Data Center with AmbiHeat® System Expansion
Calefa | Calefa Receives a Significant Equity Investment from Evli Private Capital to Accelerate Growth
Since 2013, Calefa has delivered about 200 energy systems that utilize waste heat or ambient energy. By December 2025, these systems have saved our customers:
Pioneering solution in Europe: industrial steam production from waste heat –
download the AmbiSteam® brochure to learn more!
Take a step towards non-combustion energy production with
leading technology – download the AmbiHeat brochure.
Energy recycling and electrified heat production deliver impressive results for industrial companies
Industrial companies have enormous potential to use excess heat in their processes, for heating properties, and by selling heat to district or local heating networks.
For industrial companies, Calefa implements comprehensive solutions that combine the utilization of industrial waste heat, ambient energy, and flexible production technologies, such as electric boilers and thermal energy storage.
We deliver the systems as turnkey solutions and ensure that the energy system operates according to the customer’s needs.
Our solutions provide significant energy savings and enable emission-free production of both heating and cooling in a cost-effective and reliable way.
AmbiHeat plants produce heat with zero emissions using affordable electricity, industrial waste heat, or ambient energy. Depending on the needs, the system can be integrated with heat pumps, electric boilers, or thermal energy storage. Together, these components form a flexible energy system that can be scaled to meet future requirements.
AmbiSteam solution enables the production of steam at pressures above 5 bar from industrial waste heat with excellent efficiency and zero emissions.
Retrofit solutions are designed to enable the recovery and reuse of industrial waste heat – tailored to fit existing facilities.
Calmari heat exchanger recovers heat from dryers and transfers it to preheat incoming air. For example, in laundries this solution can reduce purchased energy consumption by up to half.
AmbiHeat is a zero-emission heat pump plant using energy from the surroundings
Air - Geothermal - Waterbodies - Industrial waste heat - Solar
AmbiHeat® heat pump plant produces energy for district and local heating networks as well as for industrial needs using local energy sources, completely without CO2 emissions. It can also include an electric boiler and thermal energy storage.
Representing 100% Finnish engineering, Calefa’s heat pump plants are manufactured in factory conditions as ready-made modules that are attached to the system on site.
AmbiHeat solutions are always custom‑designed to meet customer‑specific requirements, with capacities ranging from 350 kW up to 30 MW. AmbiHeat® is suited for producing heating and cooling for large properties as well as for entire cities.
Download AmbiHeat®-brochure
Retrofit – solutions for industrial waste heat recovery and reuse
Improved profitability and lower emissions through energy recycling.
We deliver turnkey solutions for industrial companies where waste heat generated in production processes is recovered for reuse. At the same time, cooling is produced completely emission-free.
In addition to energy recycling, we are often able to improve production and/or enhance working conditions.
Calefa has extensive expertise in a wide range of industrial production processes.
Energy recycling is usually the most effective way for an industrial company to reduce its CO2 emissions. It is also highly profitable. In the systems we have delivered, the return of investment (ROI) is typically between 20–100%.
Enormous savings and emission reductions
The energy recycling systems delivered by Calefa improve profitability while reducing CO2 emissions.
