Thermia Mega Eco

    • Geothermal heat pump for advanced applications with a capacity of up to 1350 kW
    • Green technology – refrigerant R454B
    • Superior performance in heating (SCOP 5.44)
    • Inverter technology precisely adjusts to real-time demand
    • Cascade function up to 16 units
    • Hot gas technology for efficient hot water production
    • One solution for heating, domestic hot water and cooling
    • Online – control your heat pump from anywhere
    • Ready for building management systems (BMS) via Modbus
Thermia Mega Eco

Energy class when the heat pump is part of an integrated system


Energy class when the heat pump is the sole heat generator. Energy class calculated according to Eco-design Directive 811/2013



  • Superior performance with advance features

    Superior performance with advance features

    The Thermia Mega Eco inverter-controlled commercial ground-source heat pump is the ideal choice for all types of commercial buildings with advanced heating and cooling systems and very high demands on both energy-efficiency and functionality. This makes it the perfect solution for large commercial and public buildings needing an advanced control system and special applications. With an impressive seasonal coefficient of performance (SCOP) of 5.44 (Mega Eco XL at B0/W35, according to EN14825, cold climate) Thermia Mega enables you to reduce your energy consumption by up to 80%.

  • Let’s be more eco-friendly - low GWP

    Let’s be more eco-friendly - low GWP

    At Thermia, we are committed to healthier lifestyles and reducing our environmental footprint. That’s why Mega Eco is the first commercial ground source heat pump on the market with the more climate-friendly refrigerant R454B and the lowest GWP* value – 466. Moreover, thanks to its unique design, it requires a smaller volume of refrigerant than other heat pumps, resulting in a very low C02 equivalent.

    The R454B refrigerant represents innovation in every way. It is an excellent heat transfer medium that leads to greater energy efficiency and cost-effectiveness.

    * GWP stands for Global Warming Potential and is today the most accurate measure for the assessment of environmental impact level.

  • Heating capacity and flexibility

    Heating capacity and flexibility

    Thermia Mega Eco is available in five sizes:

    • Mega Eco XL 21 – 85 kW
    • Mega Eco L 14 – 58 kW
    • Mega Eco M 11 – 44 kW
    • Mega Eco S-E 10 – 33 kW (+ 5/10/15 kW)
    • Mega Eco S 10 – 33 kW

    It is possible to cascade-connect up to sixteen machines to achieve up to 1350 kW. Cascade-connected pumps start one after the other depending on energy need, thus ensuring minimum energy consumption regardless of the output. With a unique feature called Energy Source Control, heating capacity is adapted to the currently available energy source (boreholes or exhaust air).

    Installing a Thermia Mega Eco pays off in a short time thanks to large energy savings for both heating and cooling. With a wide range of accessories, Mega Eco can also heat a pool and work in combination with solar panels or additional heat sources.

  • Exceptional hot water production with hot gas technology

    Exceptional hot water production with hot gas technology

    Thermia has developed “hot gas” a unique method of producing domestic hot water. At the same time as water is being heated for distribution through the building’s heating system, hot water is produced at very high temperature through an extra de-superheater. This means that during the part of the year when the building is heated, you get lots of hot water at a very low cost.

  • Passive and active cooling – year-round comfort

    Passive and active cooling – year-round comfort

    The large areas of glass in many modern buildings are great during the darker months of the year but often lead to overheating in summer. Passive cooling ensures a perfect indoor climate all year round. If necessary, this can be supported with active cooling using the heat pump’s compressor. Both passive and active cooling are far more economical than traditional air-conditioning systems. Mega Eco can provide efficient cooling for your property during the summer.

  • Remarkable efficiency with simultaneous heating and cooling

    Remarkable efficiency with simultaneous heating and cooling

    Simultaneous heating and cooling enables you to reduce operating costs even more. To achieve this, multiple heat pumps are connected in parallel between hot and cold buffer tanks. The hot tanks connect to the heating zones and the cold tanks to the cooling zones. Mega Eco then simply exchanges hot for cold, depending on the needs of the building. For example, as a hotel conference room is cooled down, the excess heat removed is re-used to produce hot water for the swimming pool or SPA.

  • New intelligent control system

    New intelligent control system

    The controller coordinates and controls the heating system. Thermia heat pumps work with complete precision to give your home the best possible indoor climate at the lowest possible cost. Our controller is very easy to use.

    New features:

    • Menu and algorithms developed by Thermia
    • New color touchscreen
    • User friendly, intuitive menu with icons and info-graphics
    • Full overview of temperatures from refrigerant circuit
    • Compressor “envelope” visualization
    • Heat curve with 7-point adjustment
    • Plug-and-play software update via USB slot
    • Ready for building management systems (BMS) via Modbus
  • Touchscreen controller

    Touchscreen controller

    The new controller in the Mega Eco heat pump boasts a color touchscreen display and user-friendly icons that are easy to understand.

  • Thermia Online - built-in function

    Thermia Online - built-in function

    Mega Eco features Thermia Online, a function that allows remote control and monitoring using a smartphone or computer. Our online system provides installers with comprehensive diagnostics data and also enables them to respond promptly to notifications or access a live feed on system performance. Online control and monitoring optimizes energy efficiency for property owners with buildings in different locations.

    The built-in online function is part of the intelligent control system. The Thermia Online app is available for both Android and iPhone.

  • Integration – ready for BMS

    Integration – ready for BMS

    The advanced control system of this commercial heat pump constantly monitors all functions, providing you with a reassuring overview. Mega Eco can communicate with other control systems (building management systems) via Modbus. It can also be controlled and monitored via a management system that gathers information on alarms, ventilation and other systems in the same building.

  • Inverter technology

    Inverter technology

    By continuously adjusting the heat pump’s output to current demand, inverter technology enables the heat pump to supply 100% of your energy requirements. This in turn means that the user does not have to pay for any auxiliary heating. Inverters can combine large heating demand in winter and smaller hot water demand during summer, without the need for large hot water tanks. In addition, inverter technology is more friendly for power grid soft start and lower starting current.

  • The essence of Scandinavian design and durability

    The essence of Scandinavian design and durability

    Thermia heat pumps are designed, tested and manufactured in one of the harshest climates in Europe – Sweden. Swedish winters can be extreme. February is usually the coldest month, with temperatures dropping as low as -30°C or even lower in the north and heating is essential from September to May.

    All our products are designed and built from top-quality European components with authorized Thermia consultancy for system design. Thermia Mega Eco is built on over 40 years of experience in developing and supplying heat pumps.

Incredible, but true…

Incredible, but true…

Heat pumps can provide heating, domestic hot water and cooling in a single device.
Moreover, only Thermia heat pumps can heat and cool simultaneously.

The heat pump simply exchanges hot for cold, depending on the needs of the building. For example, as a hotel conference room is cooled down, the excess heat removed is re-used to produce hot water for the swimming pool or SPA.


See marketing and technical literature about Thermia Mega Eco

See also

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Thermia customers tell their stories

  • The history of this thermal resort begins thousands of years ago, when the mild climate without fog or cold winds attracted the first settlers.

    The oldest Slovenian thermal spa

    Terme Dobrna is the oldest working Slovenian thermal spa, with a history dating back 600 years.

    Today it is the most luxurious and stylish boutique hotel and spa, offering health and tranquility, with super-modern thermal efficiency, courtesy of a low carbon energy system using Thermia ground source heat pumps.

  • The Willis building was realized by Belcotec as an innovation center for its own use. “We named it in honor of the inventor of air-conditioning, Willis Carrier”, explained Jan Vangeel, CEO at Belcotec, and added: “We wanted to make a statement with our own building. The energy level is 28, which is very low for office buildings.

    The Willis building - zero CO2 emissions

    Belcotec is an HVAC installation company that specializes in the realization of high-quality installations, providing tailor-made solutions in heating, air-conditioning and sanitary installations for commercial properties. Clevr is an installation company dedicated to homeowners and self-builders. Belcotec and Clevr have combined their respective strengths to create something unique. The way they complemented each other and their mutual ambition led to the Willis project. An ultra-modern building that stimulates innovation and sustainability.

    “The Willis building is more than just an office: it is an open area with different types of workspaces, creating an atmosphere that inspires innovation. Multi-functional, comfortable, bright and adaptable are the key words to describe its design.” - Charlotte Ooms, Architect, Archiles Architecten

  • A variety of sustainable energy sources have been used to heat the building, including solar panels and geothermal heat pumps. The Competence Centre building is and must show itself smart in the way it uses energy.

    Conference Centre powered by heat pumps

    The Rakvere Smart House Competence Centre focuses on developing intelligent and smart technologies for the use of home and office equipment, automated building systems and building management. As well as being a local expert, it also actively participates in different European sustainable energy initiatives and advocates energy efficiency through innovative and smart buildings.

    “Rakvere Smart House Competence Center – the Estonian way to sustainable and energy-efficient solutions.”


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