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LIMITED QUANTITIES, BE HURRY – HEAT PUMPS AT DISCOUNT PRICES!
LIMITED QUANTITIES, BE HURRY – HEAT PUMPS AT DISCOUNT PRICES!
Choosing a heating system is one of the most important decisions a property owner makes. The right solution will bring both financial savings and living comfort for years, while the wrong choice can cause frustration and extra costs. Thermia has established itself as one of the most trusted heat pump manufacturers in the Nordics, and for good reason.
Thermia, a Swedish company, designs and manufactures its heat pumps specifically for the northern climate. While many competitors optimize their products for the central European market, Thermia's heat pumps are built to withstand Finland's harsh winters and extreme temperature fluctuations. The company's factory in Arvika, Sweden, is one of Europe's most modern heat pump research and development centers, where innovations are created to solve the challenges posed by the northern climate.
Thermia's product range covers heat pumps for all sizes of projects: from small cottages to large properties and industrial sites. The range includes geothermal heat pumps, air-water heat pumps, air heat pumps as well as effective industrial heat pumpsEach model is designed to maximize energy efficiency and comfort, and all are united by Thermia's signature reliability and longevity.
In this comprehensive guide, we go through Thermia's entire heat pump range and their differences. You will learn about the key features of each product, their suitability for different uses, and pricing information. We will also cover storage tanks, accessories, and smart remote control services that make Thermia heat pumps truly easy to use and efficient. Finally, you will receive clear guidance on which model might be right for your specific application.
Geothermal energy is one of the most energy-efficient forms of heating in Finland. It utilizes solar energy stored in the ground, which remains constant throughout the year at a temperature of about 5-8 degrees at a depth of a few meters. This makes geothermal energy a very reliable energy source that is not dependent on the outside temperature.
Thermia ground source heat pumps are known for their excellent annual coefficient of performance (SCOP), which indicates the average efficiency of the heat pump over the entire year. The higher the SCOP, the more heat you get for every kilowatt hour of electricity used. Thermia's top models achieve a SCOP of over 6, which means savings of up to 80 percent in heating costs compared to traditional heating methods.
The total cost of a geothermal heat pump, together with an energy well, typically varies between 12,000 and 35,000 euros when installed. The price is affected by: energy well drilling depth, heating needs of the property, selected device model and possible additional devices such as a hot water heater. Although the initial investment is higher than, for example, an air-to-water heat pump, geothermal energy pays for itself in energy savings in an average of 6-9 years.
Power classes: 3-12 kW (Atlas 12) and 4-18 kW (Atlas 18)
Price installed: from €15,000 – €25,000
Annual coefficient of performance (SCOP): Over 6.0
Aptitude: Single-family homes, semi-detached houses, small housing associations
Thermia Atlas is Thermia's flagship model and the first ground source heat pump on the market to exceed a SCOP of 6. This unprecedented energy efficiency means that for every kilowatt hour you use, you get over six kilowatt hours of thermal energy. The result is a significant reduction in your heating bill and a reduced carbon footprint.
Atlas represents Thermia's latest technology and is equipped with advanced inverter technology that continuously adjusts the heat pump's output to accurately match the heat demand. This means a more even indoor temperature, less electricity consumption and a longer service life for the compressor as the device does not have to start and stop constantly.
One of the biggest advantages of the Atlas is its HGW (Hot Gas Water) technology. This innovative system produces hot water “on top of the bargain” while the house is heated. With the Atlas 18 model, you can get up to 545 liters of hot water with full HGW function, while the Atlas 12 produces 488 liters. This means in practice that you will never run out of hot water, even if there are several users in the house.
Atlas is also one of the quietest ground source heat pumps in its class on the market. Quiet operation is an important feature, especially if the heat pump is located in a utility room or other space that you visit regularly. Thermia's special design in damping and compressor technology makes Atlas almost silent in everyday use.
The heat pump is controlled via a stylish 7-inch color touchscreen, which is intuitive and easy to use. From the screen, you can monitor the heat pump's operation, adjust temperatures and view energy consumption. Thermia Online remote control is included as standard with no monthly fees, so you can also control your heat pump from anywhere with your smartphone or computer.
Atlas is ideal for properties that require the best possible energy efficiency and comfort. It is an investment that will pay for itself over the years in reduced heating costs and a high resale value for the property.
Key benefits:
Power classes: 1.5-7 kW (Calibra 7) and 3-12 kW (Calibra 12)
Price installed: from €13,000 – €23,000
Annual coefficient of performance (SCOP): 5,8
Aptitude: Detached houses, cottages, small properties
Thermia Calibra RXT is a combination of modern technology and practicality. It is designed to meet the heating needs of a typical single-family home efficiently and reliably. The strength of Calibra RXT is its versatility: thanks to two different power classes, it is suitable for both smaller and larger single-family homes.
The inverter-controlled compressor is the heart of Calibra. It adjusts the heating output steplessly to match the heat demand at that moment. On the coldest days of winter, full power is available, while during the milder times of spring and autumn, the heat pump runs on an economy flame. This precise adjustment extends the device's service life and minimizes electricity consumption.
Calibra RXT utilizes Thermia's hot gas exchanger technology, which produces hot domestic water with great efficiency. The technology is based on the fact that the hot refrigerant gas from the compressor transfers its heat directly to the domestic water before it continues to heat the heating system. This double utilization makes Calibra exceptionally efficient.
The heat pump has a timeless and clean look. Calibra is available in both grey and white, so you can choose the colour that best suits your utility room or heat pump room. The compact design makes it easy to place even in tight spaces.
The SCOP value of 5.8 is industry-leading and guarantees significant savings in heating costs. In practice, this means that for every kilowatt hour used, you get 5.8 kilowatt hours of heat. Over the year, this multiplies into hundreds or even thousands of euros in savings compared to old oil or electric heating.
The Calibra RXT is an excellent choice when you want a balance between price, performance and reliability. It is a proven classic that will serve its owner year after year with minimal maintenance.
Key benefits:
⭐⭐⭐⭐⭐ “We replaced our old oil boiler with a Thermia Calibra installed by Renewe. Our heating and living costs were practically halved, and the house is consistently warm. The process was professional from start to finish.” Gierkink, Espoo.
Power classes: 1.5-7 kW (Calibra Eco 7) and 3-12 kW (Calibra Eco 12)
Price installed: from €12,000 – €22,000
Annual coefficient of performance (SCOP): ~5,5
Aptitude: Single-family homes, budget-conscious projects
The Thermia Calibra Eco is essentially the same reliable heat pump as the Calibra RXT, but at a more affordable price. The Eco model offers the same basic features and functions, making it a great choice for those who want Thermia quality without all the premium extras.
Calibra Eco is equipped with inverter technology and Thermia hot gas exchanger technology, so energy efficiency remains at a high level. The Eco model has a SCOP value of around 5.5, which is above the industry average and guarantees good savings in operating costs.
The heat pump is quiet and reliable, just like its more expensive sibling. The difference comes mainly from some additional functions and a simpler user interface. If you don't need all the extra features of the latest technology, the Calibra Eco is a sensible and cost-effective choice.
For many housing companies and property owners, Calibra Eco represents the optimal balance between investment and benefits. The heat pump pays for itself in a reasonable time, and its operational reliability is guaranteed to be at the level of Thermia.
Key benefits:
Power classes: 1.5-7 kW and 3-12 kW
Price installed: from €13,000 – €21,000
Annual coefficient of performance (SCOP): ~5,5
Aptitude: Detached houses that also require cooling
Thermia Calibra Eco Cool is an extended version of the Eco model that includes built-in cooling. Finnish summers have become warmer over the years, and more and more households appreciate the opportunity to cool their interiors on hot days.
The cooling function uses the heat pump's ability to transfer heat in both directions. In the summer, the heat pump takes heat from the interior and transfers it to the ground, making the floor pleasantly cool and the indoor temperature drop a few degrees. This is not as powerful as an actual air conditioner, but enough to make living more comfortable in the summer heat.
The cooling function is particularly appreciated in bedrooms, for example, where a cooler temperature significantly improves the quality of a night's sleep. It also increases comfort and work efficiency in living rooms and offices for those who work from home.
Calibra Eco Cool combines winter heating, domestic hot water and summer cooling in one device. This makes it a very versatile system that works all year round. The investment in the cooling function is modest, but the comfort benefit can be significant, especially in the future, when warm summers are likely to become even more common.
Key benefits:
Power classes: 4, 6, 8, 10, 13, 17 kW
Price installed: from €10,000 – €25,000 (depending on model and power class)
Annual coefficient of performance (SCOP): ~5,0
Aptitude: Single-family homes, housing associations, commercial properties
Thermia Legend is a reliable and energy-efficient ground source heat pump, available in an exceptionally wide range of six different power classes. This wide range makes Legend a suitable solution for almost any project: from a small detached house to a medium-sized housing company or commercial property.
Legend uses Thermia's patented TWS heating technology (Thermia Water System), which produces hot water very efficiently and quickly. The TWS system ensures that there is sufficient hot water available even during peak times when the whole family uses water at the same time in the morning or evening.
The Legend uses the environmentally friendly refrigerant R452B, which has a low GWP (Global Warming Potential). This is an important environmental aspect, as refrigerants can cause significant damage to the climate if they enter the atmosphere. R452B is one of the safest and most environmentally friendly refrigerants on the market.
Legend is the standard choice in many installations due to its proven reliability and competitive price. It may not offer quite the energy efficiency of the top models, but with a SCOP of 5.0 it is still excellent and delivers significant savings on heating costs. On average, Legend offers savings of around 70-80% compared to direct electric or oil heating.
Thermia Connect allows Legend to be remotely controlled and monitored. This add-on is moderately priced and provides significant added convenience, allowing you to control your heat pump with your smartphone, even from the other side of the world.
Key benefits:
Power classes: 6, 8, 10, 13, 17 kW
Price installed: from €8,000 (Legend Duo 6 kW without storage tank), total price with storage tank €10,000 – €22,000
Annual coefficient of performance (SCOP): ~5,0
Aptitude: Items with low installation space
Thermia Legend Duo is a special version of Legend, where the hot water tank is separate from the heat pump unit. This solution makes it ideal for applications where the installation space is low and a tall integrated unit cannot be installed. For example, in low basements, crawl spaces or other spaces with tight dimensions, Legend Duo is often the only possible solution.
A separate tank also gives you flexibility in terms of tank size and placement. You can choose a tank that meets your exact hot water needs and place it in the optimal location. If your hot water consumption is high (for example, in a large family or a facility with many users), you can purchase a larger tank.
In terms of technical features, the Legend Duo is completely identical to the basic Legend. It has the same TWS technology, environmentally friendly R452B refrigerant and reliable construction. The only difference is the separate storage tank, which does not affect the performance of the heat pump in any way.
Legend Duo is ideal for renovation projects where the old heating system is located in a low space. It allows you to upgrade the heating to modern geothermal energy without having to build a new installation space.
Key benefits:
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The survey visit is always free of charge and without obligation. You will receive a professional assessment of your property and a detailed offer with costs and savings estimates.
Large properties, housing companies and industrial sites need efficient and reliable heating solutions that scale as needed. Thermia's building heat pumps are designed to meet these challenges. They combine efficient heat production, intelligent control and the ability to expand the system if necessary.
Power classes: 15-88 kW (single unit), scalable to over 1.4 MW (16 units in parallel)
Price installed: Offer per site, typically €25,000 – €100,000+ depending on system size
Aptitude: Housing companies, commercial properties, industrial sites, large properties
Thermia Mega is a powerful building heat pump that, thanks to its inverter-controlled compressor, achieves up to 88 kW of power with very good efficiency. This makes it the perfect solution for large projects where traditional house-sized heat pumps are no longer sufficient.
Inverter technology is the heart of the Mega heat pump. It enables stepless power control, so the heat pump always operates at optimal power according to the heat demand. This means that the heat pump does not unnecessarily load the electricity grid, but on the other hand, it is able to produce its full power in extremely cold weather. Thanks to the flexible control options, power coverage is comprehensive, and the need for additional heat does not become an additional cost item.
One of the biggest advantages of the Mega industrial heat pump is its scalability. In a large project, it is possible to connect up to sixteen Thermia Mega XL heat pumps in parallel, resulting in a heating output exceeding 1.4 megawatts. This makes the Mega suitable even for large industrial projects, hospitals, schools and other demanding sites.
The parallel units operate as a single system, ensuring optimum energy efficiency. If one unit requires maintenance, the others continue to operate, so the heating is never interrupted. This redundancy is especially important in critical locations where a heating outage is not an option.
Hot water is produced in the Mega heat pump using hot gas exchanger technology, which also ensures sufficient capacity for hot water. This is essential in large projects where a lot of hot water is consumed.
Thermia Mega is an investment that pays for itself in significant energy savings. In housing companies, the fees can decrease as heating costs are radically reduced. In commercial properties, operating costs are reduced, which improves profitability. In industrial sites, heating energy is often a significant cost item, so the savings brought by Mega can be tens or even hundreds of thousands of euros annually.
Key benefits:
Power classes: 15-70 kW (single unit)
Price installed: Offer varies by property, typically €20,000 – €70,000+
Aptitude: Housing companies, medium-sized properties, budget-conscious projects
Thermia Mega Eco is a more cost-effective version of the Mega heat pump, offering good performance at a lower price. It is suitable for locations where the power requirement is slightly more moderate, but still clearly above the level of a detached house.
Mega Eco is a reliable choice for housing companies and medium-sized properties that want to benefit from the benefits of geothermal energy without the largest possible investment. The heat pump is reliable and energy efficient, and it pays for itself in a reasonable time through energy savings.
Mega Eco does not include all of the premium features of Mega, but the technical solutions are still of a high standard. Property owners and property managers appreciate its combination of reasonable purchase price and long-term savings in operating costs.
Key benefits:
An air-to-water heat pump (IVLP) is an excellent option when you want energy-efficient heating without the drilling or excavation work required for geothermal heat. An air-to-water heat pump collects energy from the outside air and transfers it to a property's water-circulating heating system, such as underfloor heating or radiators. It also produces hot water efficiently.
Thermia air-to-water heat pumps are designed to operate in northern climates, even at -25 or -30 degrees Celsius. This makes them a reliable source of heating all year round, unlike many cheaper models, whose efficiency drops drastically when the temperature drops below -15 degrees Celsius.
The total cost of an air-to-water heat pump typically varies between 8,000 and 16,000 euros when installed. The price is therefore clearly cheaper than geothermal heating, but the savings in heating costs can still be up to 40-60 percent compared to traditional electric or oil heating.
Power classes: 5, 9, 16 kW (various outdoor and indoor unit combinations)
Price installed: from €10,000 – €18,000
Aptitude: Single-family homes, demanding northern conditions
Thermia iTec XTR is a high-performance R290 air-to-water heat pump designed specifically for Nordic conditions. It operates efficiently down to -30°C, which is rare for air-to-water heat pumps. This makes iTec XTR a reliable heating source even in the harshest Finnish winters.
iTec XTR produces a flow temperature of up to 70°C using inverter technology. This is especially important in older properties where the heating system is designed for high temperatures, for example with traditional radiators. Many air-to-water heat pumps cannot produce such high flow temperatures, which limits their use in renovation projects.
iTec XTR uses the environmentally friendly R290 refrigerant, which reduces both energy consumption and emissions. R290 has a significantly lower GWP value than traditional refrigerants, making iTec XTR a more environmentally friendly choice.
The user interface is clear and intuitive thanks to the color display. The heat pump's operation is easy to monitor and adjust. The Thermia Online accessory allows remote monitoring and control via smartphone or computer. In addition, the calendar function allows you to program different functions as needed, for example, lowering the temperature at night or during the working day.
iTec XTR is available in three outdoor unit options and five indoor unit options, enabling an optimal solution for different applications. The outdoor unit can be selected according to capacity, and the indoor unit can be selected according to installation space and storage tank needs. This modularity makes iTec XTR a very flexible solution.
Key benefits:
Power classes: 5, 9, 16 kW
Price installed: from €9,000 – €16,000
Aptitude: Detached houses, water-circulated heating
Thermia iTec XT is a reliable mid-range air-to-water heat pump that offers a good balance between price and performance. It is ideal for single-family homes with a water-based heating system and a desire to upgrade their heating to be more energy efficient.
iTec XT is equipped with inverter technology that continuously adjusts the heat pump output to match the heat demand. This ensures a constant indoor temperature and optimizes energy consumption. The heat pump operates efficiently even at outdoor temperatures of -25°C, which is more than enough for most Finnish winters.
TWS technology (Thermia Water System) ensures that there is always enough hot water available. The technology optimally utilizes the heat energy from the refrigerant cycle, allowing the hot water to heat up faster and more energy-efficiently than traditional methods.
The iTec XT is available in three power ratings, so you're sure to find the right size for your home's needs. The smaller 5 kW and 9 kW models are well suited for newer, insulated detached houses, while the 16 kW model is also sufficient for larger or older, less insulated properties.
Key benefits:
Power classes: 5, 9, 16 kW
Price installed: from €8,000 – €14,000
Aptitude: Single-family homes, budget-conscious projects
Thermia iTec Eco is built with the latest inverter technology, making it an energy-efficient and reliable choice. It is designed specifically for the Nordic climate and constantly adapts to the heat demand, whether on a hot summer day or a cold, frosty day.
iTec Eco has a high constant output at -7 degrees, as well as effective energy saving down to -25 degrees. This means that the heat pump maintains its good efficiency even on colder winter days, unlike many competitors whose output collapses in severe frosts.
The built-in cooling function offers the possibility of comfortable indoor temperatures even in the summer heat. This is a valuable additional feature that makes iTec Eco a year-round heating and cooling system. In summer, the cool water circulating through the underfloor heating pipes lowers the indoor temperature by a few degrees, which significantly improves living comfort.
iTec Eco is an excellent choice when you want to switch to energy-efficient heating without a large initial investment. It pays for itself through savings faster than geothermal heating due to the smaller initial investment, although the annual savings are not quite as large as with geothermal heating.
With the Thermia Online accessory, you can also control and monitor your iTec Eco heat pump remotely using your smartphone or computer. This provides additional convenience and allows you to optimize your heating remotely, for example before arriving home.
Key benefits:
Power classes: 5, 9, 16 kW
Price installed: from €9,000 – €14,000
Aptitude: Single-family homes where quiet operation is valued
Thermia iTec Eco Split is a special version of the iTec Eco, where the indoor and outdoor units are separated by a split solution. This design offers several advantages, the most significant of which is the quiet operation indoors. Since the compressor and fans are located in the outdoor unit, the indoor unit is almost silent.
The split solution is ideal for locations where the heat pump is placed close to living spaces, for example in a utility room or storage room. Quiet operation is important so that the heat pump does not disturb daily life. Installation spaces close to bedrooms also benefit from a split solution.
In terms of technical features, the iTec Eco Split is similar to the basic iTec Eco. It has the same inverter technology, the same efficiency in cold conditions and the same cooling function. The only difference is structural: the outdoor unit is placed on an external wall or other suitable location outdoors, and the indoor unit indoors. The units are connected to each other with refrigerant pipes.
The split solution also offers flexibility in installation. The outdoor unit can be placed in an aesthetically optimal location, for example in the backyard of the house, where it does not interfere with the appearance of the facade. The indoor unit can be placed in the most technically suitable location inside the building.
Key benefits:
Power classes: 5, 9, 16 kW
Price installed: from €12,000 – €17,000
Annual coefficient of performance (SCOP): 4,9
Aptitude: Single-family homes, demanding users
Thermia Athena is Thermia's premium air-to-water heat pump, offering high power with high efficiency. It ensures sufficient heating and hot water with the highest savings even in the coldest months of the year. The secret to Athena's high 4.9 SCOP efficiency lies in its internal technology, which is used in only a few other air-to-water heat pumps.
Athena is not only inverter-controlled, but also equipped with intelligent EVI (Enhanced Vapor Injection) technology. With EVI technology, Athena is able to maintain its power in cold conditions and offers better efficiency and warmer water even in severe winter frosts.
EVI technology works by adding an intermediate stage to the refrigerant cycle, injecting more energy into the refrigerant in the middle of the compressor stage. This increases the temperature and pressure of the refrigerant more effectively than traditional single-stage compression. The result is better heat output and higher efficiency, especially at low temperatures.
Athena is also one of the quietest air-to-water heat pumps on the market, ensuring minimal operating noise even at maximum output. The noise level of the outdoor unit is optimized to be non-disruptive for both your own and your neighbor's property. This is important, as a noisy heat pump can cause disputes and reduce living comfort.
The Athena HC model has a built-in cooling function, which provides relief in the summer heat. The cooling works on the same principle as other models equipped with cooling: heat is transferred from the interior to the outside, transforming underfloor heating into underfloor cooling.
Key benefits:
Air source heat pumps are the most common heat pump solution in Finland due to their easy installation, reasonable price and fast payback period. They are excellent as a source of additional heating, and in many new, well-insulated houses they can even serve as the main heating system. In addition, air source heat pumps provide cooling during the summer heat and purify indoor air with efficient filtration.
Thermia air source heat pumps are designed for northern climates and operate efficiently even in cold conditions. They have an A+++ energy rating, which ensures low operating costs.
Power classes: 2.5, 3.5, 5.0 kW (heating capacities)
Price installed: from €2,000 – €3,500
Energy class: A+++
Annual coefficient of performance (SCOP): 5,1
Aptitude: Offices, detached houses, cottages, very demanding conditions
Thermia Aura T2 is the premium model in Thermia's air source heat pump range. The A+++ energy class and 5.1 SCOP efficiency guarantee maximum performance and functionality even in the northern, very demanding low outdoor temperatures. This makes Aura T2 an excellent choice also for Northern Finland and areas where temperatures regularly drop below -25 degrees.
With a high airflow and a throw of up to 15 meters, the air is distributed evenly throughout the room, quickly adjusting it to the desired temperature. This is especially important in larger rooms and open-plan spaces where air needs to be circulated efficiently throughout the room. The Aura T2's powerful fan and optimized air control blades ensure that the heat is distributed evenly to every corner.
The Aura T2's indoor unit is very quiet even in very cold outdoor temperatures. Quiet operation is especially important in a bedroom or living room. Many air-to-air heat pumps become noisy when the outdoor temperature drops and the heat pump has to produce maximum output. The Aura T2 remains quiet even in these conditions.
Built-in WiFi allows for convenient remote control with a smartphone or tablet. The Thermia Online app lets you adjust the temperature, select operating mode, set schedules and monitor energy consumption from anywhere. This is handy, for example, if you want to heat up your cottage before you arrive or adjust the temperature in your home during the workday.
A double filter for indoor air purification is an excellent addition that significantly improves indoor air quality. The filter effectively removes dust, pollen and other particles from the air. This is especially important for allergy sufferers. In addition, the air source heat pump dries the air slightly, which reduces problems caused by humidity, such as mold growth.
The cooling function in summer makes Aura T2 a true year-round system. When the temperature rises above 25 degrees, the air source heat pump can cool the room to a comfortable temperature. The cooling is not as strong as in an actual air conditioner, but enough to make living much more comfortable on hot summer days.
Key benefits:
Power classes: 2.5, 3.5, 5.0 kW (heating capacities)
Price installed: from 1800 – 2800 €
Energy class: A++
Aptitude: Offices, detached houses, cottages, additional heating
Thermia Aura S2 is a more affordable option that still offers good performance and Thermia quality. It is ideal as an additional heating source for detached houses or as a main heating source for well-insulated small properties and cottages.
The A++ energy class guarantees good energy efficiency and low operating costs. Although the Aura S2 does not quite reach the peak efficiency of the Aura T2, it is still clearly better than many basic models on the market. The savings in heating costs are significant, and the heat pump typically pays for itself in 3-5 years.
Aura S2 offers both heating and cooling functions, making it usable all year round. In summer, the air source heat pump can cool the indoor temperature by several degrees, making living more comfortable. In winter, it heats efficiently and economically.
Three power classes ensure that you can find the right size for your location. The smallest models are suitable for individual rooms or small cottages, for example, while the largest 5 kW model is sufficient for larger spaces or can serve as the main heating in small, well-insulated houses.
Key benefits:
A hot water tank is an essential part of a heat pump system, as it stores hot water and ensures that it is available in sufficient quantities whenever needed. Thermia hot water tanks are designed to work optimally with Thermia heat pumps and are available in different sizes to suit different needs.
Thermia MBH series water heaters are integrated solutions designed specifically for use with ground source heat pumps. They are carefully insulated to minimize heat loss and equipped with efficient heat exchangers for fast water heating.
MBH tanks are made of stainless steel or enameled steel, which ensures a long service life and hygienic drinking water. Different sizes allow you to choose a tank according to the capacity you need.
Key benefits:
The WT-C FC series of tanks are floor-mounted hot water tanks that are ideal for both ground source and air source heat pumps. They offer a wide range of sizes, so you are sure to find the right capacity for your home's needs.
WT-C FC tanks are equipped with efficient coils that enable fast water heating. This is especially important in the mornings and evenings when several family members use hot water at the same time.
Key benefits:
Thermia WT-S series tanks are traditional floor-standing hot water tanks that are ideal for a wide range of installation applications. They are reliable and durable choices that provide a consistent supply of hot water.
WT-S tanks are made of high-quality materials and their insulation is optimized to keep the water warm with minimal heat loss, saving energy and money in the long run.
Key benefits:
The WT-T series tanks are designed for situations where a larger hot water capacity is needed. They are well suited for larger detached houses with many people living in them, or for locations where a lot of hot water is consumed.
A larger tank ensures that there is enough hot water even when several people use it within a short period of time. For example, in the morning, when everyone takes a shower in a row, a larger tank ensures that not even the last person runs out of hot water.
Key benefits:
The WT-V series buffer tanks are not actual hot water tanks, but buffer tanks for the heating system. They even out temperature fluctuations in the heating system and improve the overall efficiency of the system.
A buffer tank is particularly useful when multiple heating circuits are connected to a heat pump system, such as underfloor heating, radiators and possibly ventilation heating. The buffer tank balances the heat needs of these different circuits and ensures that the heat pump operates optimally.
Key benefits:
Thermia heat pumps are efficient in their basic versions, but with accessories and smart functions you can take comfort and energy efficiency to a whole new level. Thermia accessories are designed to integrate seamlessly with the heat pumps, and many of them are even available at no additional cost.
Thermia Connect is an accessory that connects your heat pump to the internet and enables you to use the Thermia Online remote control service. The service is completely free and does not involve any monthly fees or other ongoing costs. This is a significant advantage compared to many competitors who charge a monthly fee for remote control.
The Thermia Online app lets you control and monitor your heat pump from anywhere using your smartphone or computer. The app is available for both iOS and Android devices, and also works in your computer's browser.
Key features of Thermia Online:
Remote control: Adjust temperatures, change operating modes and make other adjustments remotely, even if you're on the other side of the world. This is handy, for example, at a cottage: you can pre-heat the cottage before you arrive, so you're welcome inside after a long drive.
Timing functions: Thermia Online includes a calendar function that allows you to program the heat pump to operate according to your needs. For example, you can lower the temperature at night or during the working day to save energy, and automatically raise it before you get home. Weekly and daily programs are easy to set through the intuitive user interface.
Monitoring and statistics: The app shows real-time heat pump operating data: supply water temperature, outdoor temperature, hot water temperature and more. You can also view energy consumption statistics, which help you optimize your heat pump operation and understand when and how energy is being consumed.
Alarms: If your heat pump malfunctions or needs maintenance, Thermia Online will send you a notification on your smartphone. This way, you can react quickly and avoid major problems. Many problems can be solved remotely with simple adjustments, without having to call a service technician.
User-friendly interface: The application is designed to be clear and easy to use. Large buttons and logical menus make navigation effortless even for those who are not technically oriented.
Thermia Online brings significant added value and convenience to heat pump use. It is an investment that pays for itself in saved time and energy.
Thermia Smart Price is an intelligent exchange-based electricity control system that optimizes the operation of the heat pump according to the hourly electricity price. In the Nordic countries, the price of electricity varies hourly on the exchange, and these fluctuations can be significant: during the cheapest time, electricity can cost a few cents per kilowatt-hour, while during the most expensive time, the price can increase many times over.
Thermia Smart Price takes advantage of these price fluctuations by intelligently controlling the operation of the heat pump:
Cheap electricity hours: When electricity prices are low (typically at night and on weekends), the heat pump produces more heat and hot water. The house is heated to “storage”, meaning the indoor temperature is raised slightly higher than usual, and the hot water tank is heated to full capacity. This stored heat lasts a long time, and the heat pump does not have to run as much during hours of expensive electricity.
Hours of expensive electricity: When electricity prices are high (typically in the mornings and afternoons on weekdays), the heat pump reduces its operation to a minimum. It utilizes previously stored heat and does not consume expensive electricity unnecessarily.
Thermia Smart Price is fully automatic once it is activated. The system automatically downloads electricity price data and optimises the heat pump operation accordingly. You don't have to do anything - the savings accrue automatically day after day.
Savings potential The savings from the exchange-based electricity control can be significant. Typically, the savings are 10-20 percent of the heat pump's electricity bill, depending on the fluctuations in electricity prices in your area and how the heat pump is used. On an annual basis, this can mean additional savings of hundreds of euros.
Thermia Smart Price is available as a separate accessory and is easy to install. It is compatible with most Thermia heat pumps and only requires an internet connection to operate.
Thermia heat pumps are available with a pool heating option that uses the heat energy produced by the heat pump to heat the swimming pool. This is a very efficient and economical way to keep the swimming pool warm throughout the swimming season.
A traditional electric resistance heater for pool heating consumes a huge amount of electricity, and operating costs can easily reach thousands of euros in the summer. Pool heating with a heat pump can reduce these costs by up to 70-80 percent, as a heat pump produces heat energy so much more efficiently than a direct electric resistance heater.
Pool heating is seamlessly integrated into the Thermia heat pump system. The heat pump produces heat for the house, domestic water and pool simultaneously, and the system automatically optimizes the heat distribution. For example, in summer, when the house's heating demand is low, most of the energy produced by the heat pump can be directed to pool heating.
The pool heating add-on is suitable for both ground source and air source heat pumps. Installation is relatively simple and can be done either when installing a new heat pump or retrofitting an existing system.
Thermian heat pumps is designed to work seamlessly with other energy sources, such as solar energy, wood heating or other renewable energy solutions This hybrid approach allows for maximum energy efficiency and independence from a single energy source.
Solar collectors produce thermal energy almost for free on sunny days. When a solar collector is connected to a Thermia heat pump system, it can, for example, produce a large part of the energy needed to heat domestic water in the summer. The heat pump supplements the solar energy production on cloudy days or when the heat demand is higher.
Wood heating (for example, a fireplace, a storage fireplace or a wood boiler) can work alongside a heat pump, especially in the coldest winter months. Heating with wood is often economical, especially if you have cheap or free firewood available. A heat pump can serve as the main heating system for most of the year, and wood heating is only used when necessary.
Thermia heat pump systems support these hybrid solutions with flexible control and compatible interfaces. The system automatically optimizes the use of different energy sources to maximize overall efficiency and savings.
Thermia offers a five-year factory warranty on all its heat pumps, which is the industry standard and a testament to the quality and reliability of the equipment. The five-year warranty covers manufacturing and material defects, so you can be sure that your investment is safe in the early years.
Thermia Turva is a unique insurance service that allows you to extend the warranty until the heat pump is 18 years old. The first five years are included in the free factory warranty, after which you can take Thermia Turva into use one year at a time if you wish.
Thermia Turva covers both parts and labor if your heat pump breaks down. This means you get comprehensive protection without unexpected maintenance bills. Without insurance, heat pump maintenance can cost hundreds or even thousands of euros, so Thermia Turva is a valuable peace of mind.
The annual cost of the insurance is moderate compared to the protection it provides. Many customers choose Thermia Turva precisely because it makes using the heat pump completely worry-free. Knowing that the insurance covers any possible repairs, you can enjoy the benefits of the heat pump without stress.
Thermia heat pumps are widely used in Finland, which ensures good reliability of supply. Spare parts are readily available, and Thermia maintains a comprehensive spare parts logistics. This means that any faults can be repaired quickly, and you do not have to wait weeks or months for spare parts from abroad. A quick repair is especially important in winter, when the heat pump is essential for living comfort and protecting the house.
One of the biggest reasons to choose a heat pump is the significant savings it brings in heating costs. Thermia heat pumps are among the most efficient in their industry, which means the greatest possible savings.
With a ground source heat pump, you can save 50-80 percent on heating costs compared to traditional electric or oil heating. In practice, this means annual savings of 1,000-2,000 euros for a typical small property.
The payback period for a ground source heat pump is typically 6-9 years, depending on the initial investment. After that, the savings are pure profit. Considering that a quality ground source heat pump can easily last 20-25 years (or longer with proper maintenance), the investment is definitely worthwhile in the long run.
With an air-to-water heat pump, savings are typically 40-60 percent in heating costs. Annual savings can be 900-1800 euros in an average-sized detached house. Since the initial investment is smaller than with geothermal heat, the payback period is shorter: typically 5-7 years.
An air-to-water heat pump is ideal for renovation projects where drilling a geothermal well is not possible or desirable. Its fast payback period also makes it an attractive option for those who want to see a return on their investment faster.
An air source heat pump as an additional heat source can save 30-50 percent of heating costs, depending on how much it is used. In a smaller, well-insulated property, an air source heat pump can even act as the main heating source, in which case the savings are even greater.
The payback period of an air source heat pump is often only 3-5 years due to its low purchase price (2000-4000 € installed) and yet significant savings. This makes it one of the fastest energy solutions to pay for itself.
You can apply for a household deduction for the installation work of a heat pump. The household deduction is 35 or 60 percent of the work share (maximum deduction €2,250/person/year in 2025). This significantly reduces the initial investment and improves the payback period even further.
For example, if the cost of installing a geothermal heat pump is 5,000 euros, you can receive a household deduction of 3,000 euros. This significantly reduces the overall costs and makes the investment even more attractive.
Renewe advises on applying for household deductions and ensures that the invoicing is in the correct format to receive the deduction.
Purchasing a Thermia heat pump is easy and hassle-free, the process proceeds in a clear order from start to finish.
The first step is to contact us. You can do this by phone, email or via our online form. We will make an appointment for a free survey visit and arrange a suitable time with you.
Our expert will visit your property to assess the situation on site. During the survey visit, we will review:
Based on the survey, Renewe recommends the best solution for the site and sizes the heat pump correctly. Correct sizing is very important, as a heat pump that is too small will not produce enough heat, and one that is too large will be unnecessarily expensive and may not function optimally.
After the survey visit, you will receive a detailed written offer that includes:
The offer is non-binding, so you can consider and compare at your leisure. We are happy to answer any questions.
When you decide to order a heat pump, an installation schedule will be agreed upon. For a geothermal heat pump, this also includes scheduling the drilling of the heat well (the permit processing for an energy well currently takes about 2 months). Renewe will handle all the necessary permits and notifications.
Professionals will install the heat pump on a turnkey basis. The basic delivery includes:
The installation of a ground source heat pump typically takes 2-4 days, depending on the size of the project. The installation of an air-to-water heat pump is faster, usually 1-2 days. An air-to-air heat pump can be installed in as little as a few hours.
At the end of the installation, the installer will go over the operation of the heat pump and guide you through its use. You will learn how to adjust the temperatures, how to activate the remote control, and what maintenance is required for the device. The installer will answer all your questions and ensure that you know how to use the device.
After installation, please contact us for maintenance if necessary. Regular maintenance ensures optimal operation and a long service life of the heat pump. Maintenance includes, for example, checking pressures, cleaning filters and ensuring system operation.
Thermia's wide range of heat pumps offers a solution for every need, from the smallest cottages to the largest properties. Choosing the right model depends on the characteristics of your property, your budget and your needs.
New detached house or thorough renovation:
Select geothermal heat pump (Atlas, Calibra or Legend) for the best energy efficiency. Geothermal is the most expensive initial investment, but in the long run the most affordable and efficient solution.
Existing detached house, water-circulated heating:
Select air-water heat pump (iTec series or Athena) if drilling a geothermal well is not possible or desired. An air-to-water heat pump is a cost-effective solution that pays for itself quickly.
Additional heating or cooling:
Select air source heat pump (Aura T2 or Aura S2) due to easy installation and quick payback time. An air source heat pump is also an excellent solution for a cottage without water-based heating.
Housing company or commercial property:
Select property heat pump (Mega or Mega Eco) due to sufficient power and scalability. Industrial heat pumps are designed for large sites and offer excellent energy efficiency even in demanding conditions.
Examples of eligibility and repayments;
| Quid | Type | SCOP | Price | Suitable for | Back |
|---|---|---|---|---|---|
| Atlas | Geothermal energy | 6.1 | 15 000€ | New building | 4-8 years |
| Calibra RXT | Geothermal energy | 5.8 | 13 000€ | Town house | 5-8 years |
| Legend | Geothermal energy | 5.0 | 10 000€ | Budget | 6-9 years |
| iTec XTR | Air water | 5,4 | 10 000€ | -30°C, drilling is not possible | 4-7 years |
| iTec Eco | Air water | 5,0 | 8 000€ | Renovation + cooling | 4-7 years |
| Aura T2 | Air temperature | 5.1 | 2 000€ | Additional heating | 3-5 years |
| Mega | MLP property | 4,6 | 25 000€ | Housing company | 4-8 years |
✅ Energy requirement of the site: What is the current heating cost and energy consumption?
✅ Heating system: Is it water-circulated heating (floor heating/radiators) or direct electric heating?
✅ Installation mode: Is there room for a heat pump and possible storage tank? Are there any height restrictions?
✅ Plot: Can a geothermal well be installed (drilling depth approx. 150-250 m)? Is the plot in a groundwater area?
✅ Budget: What is a realistic budget for the initial investment? Are you considering financing?
✅ Household deduction: Can you take advantage of the household deduction for installation work?
✅ Additional features: Do you need cooling function? Do you want remote control?
✅ Pool heating: Do you have a swimming pool that you would like to use a heat pump to heat?
✅ Guarantees: Are you considering Thermia Turva insurance after the factory warranty has expired?
Contact Renewee and request a free survey visit. Our professional will help you choose the most suitable solution for your specific location and calculate an accurate cost estimate and savings estimate.
A Thermia heat pump is an investment in the future – an investment that pays for itself in savings, increases living comfort and reduces your carbon footprint year after year.
Book a free survey: 010 660 3030 | info@renewe.fi | Fill out the form online
How much does a Thermia ground source heat pump cost once installed?
The total cost of a Thermia ground source heat pump typically varies between 12,000 and 30,000 euros when installed. Basic models such as Legend start at around 12,000 euros, while the top model Atlas can cost 25,000 to 28,000 euros. The price is affected by the drilling depth of the heat well (150–250 m), the specific characteristics of the site, the type of storage tank and any additional equipment. The household deduction reduces the installation work by 60 % (maximum 2,250 €/person/year in 2025), which significantly reduces the total cost. An average detached house typically gets a ground source heat pump installed for around 18,000 to 22,000 euros, including all costs.
Which is better: a ground source heat pump or an air-to-water heat pump?
A ground source heat pump is the most energy-efficient option (SCOP over 5.5, savings 50–80 %) and the best long-term investment, but requires drilling a heat well and a larger initial investment. The payback period is 7–9 years. An air-to-water heat pump is the most practical solution for renovation projects when drilling is not possible, for example. It is cheaper (€8,000–16,000 installed), saves 40–60 % and has a faster payback period (5–8 years). Choose ground source heat for new projects or thorough renovations, and air-to-water for existing projects or when drilling is not an option.
Which Thermia model is best suited for my detached house?
For a new, well-insulated house (less than 10 years old), a great choice is Thermia Atlas (if your budget allows) or Calibra RXT/Eco. The output is 3–12 kW depending on the size of the house (100–250 m²). For an older house (over 20 years old), we recommend Thermia Legend for geothermal heating or the iTec XTR/XT series for air heating, which are suitable for higher supply temperatures. Output 6–10 kW (geothermal heating) or 9–16 kW (air-to-water). For a cottage or small house (less than 100 m²), a Calibra Eco 7 or Aura S2 air-to-air heat pump (2.5–5 kW). Book a free survey visit, where a professional will size the heat pump exactly according to your needs.
How long does a Thermia heat pump last and what kind of maintenance does it require?
A Thermia ground source heat pump lasts 20–25 years with proper maintenance, an air-to-water heat pump 15–20 years and an air-to-air heat pump 12–18 years, on average. Annual basic maintenance (€200–400) includes checking pressures, cleaning filters and ensuring system operation. A more extensive inspection is recommended every five years. Thermia Turva insurance is worth considering after the factory warranty (5 years) has expired – it covers both spare parts and labour up to 18 years.
Does the Thermia heat pump work in severe frosts and can it cool you down in the summer?
Thermia heat pumps are designed specifically for the northern climate. Ground source heat pumps (Atlas, Calibra, Legend) operate reliably at all temperatures, as the soil temperature remains stable at +5–8 degrees. Air-to-water heat pumps operate efficiently even at -30°C (iTec XTR) or -25°C (iTec XT/Eco, Athena). Air source heat pumps such as Aura T2 also operate in very cold conditions. The cooling function is available in the Calibra Eco Cool, iTec Eco/Split, Athena HC and all Aura air source heat pumps. Cooling lowers the indoor temperature by 3–6 degrees at very low operating costs, using the same system as for heating.
Sources and additional information:
Article updated: Mika Wettenhovi, October 2025
