Award-Winning AmbiHeat Heat Pump Plant Delivers on Expectations During Its First Year of Operation
Savon Voima, a Finnish energy company, has now operated its innovative AmbiHeat heat pump plant in Joensuu, Finland, for nearly a full year. The first year of operation has shown that the solution, built around two heat sources, performs as expected and supports Savon Voima’s goal of electrifying its heat production. In July, the plant produced heat without combustion for more than a month.
Data Center Cooling Provides Heat for Nordic Homes and Cities
Efficient data center cooling has a direct impact on computing performance, operational reliability and energy efficiency. Calefa delivers data center and server room cooling solutions across Finland using the AmbiHeat heat pump system, which recovers excess heat and converts it into usable thermal energy.
Circular Economy Delivers District Heat to 1,700 Households in Kouvola
The 4 MW AmbiHeat heat pump plant in Kouvola, Finland, captures heat from treated wastewater and turns it into district heating. The project reduces local energy company KSS Energia’s heat production emissions, cuts the need for fossil fuels, and supports the integration of circular economy solutions into energy production.
AmbiHeat Solution Balances Biogas Plant’s Energy Balance
In a biogas plant, the demand for heating and cooling typically stems from maintaining reactor temperature, hygienisation, and gas treatment. The modular AmbiHeat solution delivers reliable cooling and simultaneously reduces the need to produce heat using biogas.
Internationally Award-Winning AmbiHeat Plant Has Been Commissioned in Joensuu
The internationally recognized AmbiHeat plant, built next to Savon Voima’s Joensuu power plant, was commissioned in December. The facility received the prestigious Heat Pump City of the Year award in autumn 2025.
Electrified Heat Production Is Rapidly Gaining Ground – Flexible Solutions Respond to Market Changes
The structural transformation underway in Northern Europe’s energy sector is accelerating the shift toward electrified heat production. The rapid growth of wind power has brought large amounts of affordable and variable electricity to the market, making market-driven heat production more profitable than before.
MinersLoop Doubles the District Heat Production at Data Center with AmbiHeat® System Expansion
MinersLoop, a Finnish company operating in IT and energy sectors, is expanding the AmbiHeat® heat pump system by Calefa with an additional 2 MW of cooling capacity. The system, located next to the company’s data center and commissioned in summer 2024, will be increased by 2.5 MW in heating output — doubling the site’s district heating production.
KSS Energia Strengthens Its Electric Heat Production Profile with AmbiHeat Heat Pump Plant
Finnish energy provider KSS Energia and Calefa have agreed on the turnkey delivery of a 4 MW AmbiHeat heat pump plant. Utilizing excess heat from wastewater, the AmbiHeat facility will reduce CO2 emissions of heat production by 14,000 tons per year while also increasing the company’s capacity on the electricity markets.
The Artic Circle Celebrates World Water Day with a 40 GWh Heat Pump Plant
A new AmbiHeat plant by Calefa has entered the construction phase at Neve Oy’s wastewater treatment plant in Rovaniemi, Finland.
Finnish Company Leads the Way in Utilizing Data Center Waste Heat for District Heating
The energy system balancing data center of MinersLoop utilizes waste heat with a COP value of up to 5.