Zero-Emission Heat Pump Plant Utilizing Local Sources of Energy
Air – Geothermal – Waterbodies – Industrial waste heat – Solar
AmbiHeat® Heat Pump Plant Transfers Energy Production to a Combustion-Free Process
The modular AmbiHeat® heat pump facility generates energy for district and local heating networks, as well as industrial needs, by utilizing ambient energy sources — entirely without CO₂ emissions.
This patented, all-inclusive solution is delivered to the site as a ready-to-operate unit. AmbiHeat® plant can also include electric boilers and thermal energy storage.
Why Choose the AmbiHeat Heat Pump Plant for Energy Production?
From Large Buildings to Urban Energy Demands
Modular heat pump plants are suitable for a wide range of power requirements, from 350 kW to over 30 MW. The AmbiHeat heat pump plant generates thermal energy from locally available environmental sources, precisely where the energy is needed.
Affordable Energy Through Leading Technology
Based on world-leading heat pump technology, the AmbiHeat® heat pump plant delivers high-efficiency thermal output at temperatures suitable for district heating networks and industrial processes — even when utilizing low-grade heat sources
Even in the Heart of the City
The heat pump plant can be safely installed in residential or industrial areas. It operates quietly and produces no particulate emissions into the environment.
Heating and Cooling in One Solution
In addition to heat production, the AmbiHeat® heat pump plant can also provide cooling. This cooling capability can be utilized for district cooling or industrial process refrigeration. The plant can also include electric boilers and thermal energy storages, which further improve the flexibility of heat production.
100% Made in Finland
Calefa’s AmbiHeat® heat pump plants are manufactured and tested in Ikaalinen, Finland, in our own factory. Each system is delivered as a fully customized turnkey solution tailored to your specific energy needs.
Factory-Built, Modular Solution
The heat pump plants are manufactured under controlled factory conditions and delivered in modules to the selected installation site. The modularity of the AmbiHeat system allows electric boilers and thermal energy storage to be integrated into the same system even at a later stage.
Comprehensive Lifecycle Services
As a full-service provider, Calefa supports the heat pump plant throughout its entire lifecycle. Remote monitoring and lifecycle services for the entire system ensure peace of mind for the duration of the plant’s operation.
One or Multiple Heat Sources
Ambient air, water bodies, geothermal energy, solar power, and industrial waste heat — what sources of thermal energy are available in your surroundings? The AmbiHeat® heat pump plant offers a smart way to transition your energy production to 100% carbon-free.
Award-Winning in Europe
The AmbiHeat heat pump plant concept has been recognized by the European Heat Pump Association (EHPA) in the DecarbIndustry category, with the Orion facility in Turku, Finland, serving as a model example.
Take a step towards non-combustion energy production with
leading technology – Download the AmbiHeat brochure.
The AmbiHeat plant enables versatile electric heat production
Alongside the AmbiHeat heat pump plant, electric boilers and thermal energy storage can be integrated as part of a modular AmbiHeat plant delivery. This enables production to be scaled according to electricity market prices and allows energy to be stored efficiently.
AmbiHeat Heat Pump Plants — from Industry to Energy Utilities
Heat pump plants are an excellent choice for accelerating the green transition in energy production, whether for industrial processes or utility companies. The AmbiHeat heat pump plant has provided solutions for diverse needs across Finland.
90°C Heat Refined from Wastewater, Delivered Directly into the District Heating Network
The AmbiHeat heat pump plant, with a capacity of 5 MW, was delivered to Finnish energy company Lahti Energia. It consists of three modules that were assembled on-site into a unified facility. The installation includes seven heat pumps, integrated systems for wastewater treatment and heat recovery, and a centralized electrical automation unit.
Orion Utilizes AmbiHeat for Both Cooling and Heating
Traditional Finnish Pharmaceutical Company Orion uses the AmbiHeat heat pump plant for both cooling and heating at its local facilities in Turku and Espoo. The Turku installation has received European-level recognition for its carbon-neutral performance.
Chemical Industry Company Kiilto Relies on AmbiHeat for Process Cooling
At the Lempäälä facility of Kiilto — a traditional Finnish family-owned company — the AmbiHeat heat pump plant is used for process cooling in adhesive manufacturing. It also upgrades waste heat for use both within the factory area and in the district heating network operated by the local energy company, Lempäälän Lämpö.
Heat Pump Plants Enable the Green Transition
What: Calefa’s heat pump plants, with capacities up to 30 MW, enable efficient energy production for utility companies and industrial operations. In addition to heating, the system can also provide cooling and utilize waste energy for heat generation.
Where From: Heat pump plants can harness multiple types of heat sources. AmbiHeat systems have previously utilized industrial waste heat, thermal energy from wastewater and natural water bodies, as well as excess heat from various cooling processes.
Where To: The AmbiHeat heat pump plant can be installed based on the location of the heat source and the energy demand. Its modular design allows for easy placement either in a separate building or integrated into an existing facility—and it can even be landscaped to fit seamlessly into urban environments.
Capture Waste Heat — 5 Ways to Utilize a Heat Pump Facility
- Do your operations generate waste heat that could be repurposed for heating? Industrial cooling processes and flue gas scrubbers used in heat production are examples of where heat pumps can be effectively utilized.
- Are there nearby operators whose waste heat could be upgraded into district heating using a heat pump facility? For instance, municipal wastewater treatment plants offer a significant resource for heat production.
- Do you need efficient and reliable cooling? A heat pump facility can provide carbon-neutral cooling even for critical industrial processes, such as pharmaceutical manufacturing or aluminum production.
- Would you like to increase carbon-neutral heating capacity, for example, in a district heating network? Heat pump facilities can produce emission-free heat at temperatures up to 90°C.
- Does your industrial process generate more waste heat than you need? Sell and upgrade the surplus heat with a heat pump facility to a local energy provider.
Take a step towards non-combustion energy production with
leading technology – Download the AmbiHeat brochure.
“These two heat pump plants delivered by Calefa produce approximately one quarter of the district heating demand in Kankaanpää. They have significantly reduced fuel consumption, resulting in annual savings of around one million euros.”
– Pekka Passi, CEO of Vatajankoski Oy, a Finnish energy utility company
Heat Pump Facility as a Turnkey Delivery — Confidence in Green Energy Solutions
Calefa’s heat pump facilities are always delivered as comprehensive turnkey solutions, designed to maximize all available heat production opportunities for the customer.
As a project supplier specialized in turnkey deliveries, Calefa is responsible for the design, commissioning, and aftercare of a cost-effective total solution.
Project interfaces are kept clear throughout the heat pump facility delivery, and the solutions are implemented with years of experience. This means the customer does not need an extensive project organization or in-depth heat pump expertise
How a Heat Pump Facility Project Progresses with Calefa
Waste Heat Potential Assessment
- We assess the potential for utilizing waste heat directly on-site. We identify the sources of surplus energy and evaluate how it can be harnessed through a heat pump facility. We calculate the feasibility of the solution, including the expected energy savings and payback period.
Identifying Added Value
- Can the same heat pump facility be used to enhance production efficiency or improve working conditions? In most cases, yes. Our expertise in industrial processes allows us to support customers in identifying and realizing these additional benefits. At the same time, we assess how electric boilers and thermal energy storage can complement the overall solution.
Recommended Action
- We only recommend implementation if our calculations show the solution to be financially viable. In practice, this means a payback period of 1 to 5 years for the heat pump facility.
Let's design a heat pump plant for your needs
The green transition is a necessary change.
Let’s solve your heating or cooling needs with a combustion-free heat pump facility.
Contact our experts and request an initial assessment for a heat pump solution.
Lari Heinonen
Sales Manager
+358 40 5238591
lari.heinonen@calefa.fi
Petri Vuori
Stay Up to Date with Our Heat Pump Facility Developments
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Calefa | Calefa Continued Its Strong Growth in 2025
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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
Frequently Asked Questions About Our Heat Pump Facilities
Calefa’s AmbiHeat heat pump facilities can generate heat even from very low-temperature sources, with a COP of up to 5.
The AmbiHeat heat pump facility is an excellent fit for both industrial heating and cooling needs. In addition to energy-efficient cooling, it can deliver extremely high temperatures — up to +130°C — for demanding industrial processes. Explore our HotLevel® heat pump technology to learn more.
The AmbiHeat® heat pump facility can be positioned according to the customer’s specific needs. Thanks to its modular design, it can also be directly connected to systems such as a factory site’s internal energy infrastructure or a district heating network operated by an energy company.
We deliver heat pump facilities tailored to the needs of customers of various sizes. Our capacity range spans from 350 kW to over 30 megawatts.
The AmbiHeat® heat pump facility is designed to flexibly utilize various — even multiple — ambient energy sources, depending on the customer’s needs. Examples of heat sources used in our facilities include air, ground heat, bodies of water, flue gas scrubbers, and industrial waste heat.
AmbiHeat® heat pump facilities can generate heat even from low-temperature sources. For example, our systems recover heat from treated wastewater at around 10°C across various sites in Finland.