heating

free geothermal and waste-based heating

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The race to dominate artificial intelligence (AI) is no longer waged only in the aseptic laboratories of Silicon Valley or in microchip factories; is moving towards a much more earthly and critical terrain: electricity. At a time when data centers threaten to saturate the global electrical grid due to their voracious consumption, big technology companies are desperately seeking sources of continuous, stable and emission-free energy. The answer, surprisingly, does not seem to lie in looking to the sky for sun or wind, but in drilling down, miles underground. Geothermal energy has ceased to be a secondary actor and has become the great hope of the sector. But in Europe, this technological revolution is accompanied by a master shift. It’s been under our feet. Historically, geothermal energy generation was considered viable almost exclusively in exceptional volcanic regions, such as Iceland or Indonesia. It depended on finding underground pockets that naturally had heat, water, and permeable rock. However, as the report explains Hot stuff: geothermal energy in Europe of the Ember think tankthe technological advances of the last decade have completely rewritten this map. The industry has adapted deep drilling and reservoir engineering techniques from the oil and gas sector, reducing well costs by approximately 40%. Now, so-called Enhanced Geothermal Systems (EGS) allow fluids to be injected to create artificial fissures in hot, dry rock, extract that heat and generate electricity at the surface, regardless of the natural permeability of the ground. Numbers that change the energy board. The impact of this technological disruption is monumental. As detailed by analyst Pawel Czyzak in his newslettergeothermal energy can now be produced at levelized costs (LCoE) of less than €100/MWh. To put it in perspective, the marginal cost of electricity generated by gas and coal in Europe ranged between €90 and €150/MWh during 2025. Geothermal is already economically competitive. In the European Union, this technology could develop around 43 GW of commercially viable capacity today. With geothermal plants operating 24/7, this would translate into around 301 TWh of electricity per year, the equivalent of replacing 42% of all EU coal and gas power generation last year. The countries with the greatest potential identified under this profitability threshold are Hungary (with 28 GW), Poland, Germany and France. The “Triple Victory” strategy. Europe’s great asset lies in geography and urban planning. According to Czyzak,the areas with the greatest geothermal potential at 5,000 meters depth coincide strikingly with large European data center nodes – such as Paris, Amsterdam and Frankfurt – and with planned district heating networks (known as district heating). The plan is to locate data centers near these geothermal plants. The plant powers the AI ​​and, subsequently, the waste heat generated by both the plant and the servers themselves is injected into the district heating networks. Institutions are already making moves. By the end of 2024, the Council and the European Parliament supported the creation of a European Geothermal Alliance to expedite permits and finance the sector. In this scenario, Spain claims a leading role: Vice President Teresa Ribera (whose position is now held by Sara Aagese) announced an injection of 100 million euros for ten deep geothermal projects. The majority will be located in the Canary Islands due to their exceptional volcanic subsoilalthough the peninsula already has pioneering projects underway, such as the 150-meter wells on the Vitoria university campus or the 6.5 MW installation in the City of Arts and Sciences in Valencia. The Nordic laboratory. To understand how the final part of this plan—heating homes with data—works. you have to look at Helsinki. The Finnish capital has found an unexpected ally in the residual heat of servers to decarbonize its winters. Through the energy company Helen, the city has been testing this model for years. The results show that a single data center in Helsinki can heat up to 20,000 homes. The Telia installation, for example, already recovers 90% of the heat emitted by its machines, currently providing shelter to 14,000 apartments. This thermal miracle requires two elements: an extensive network of urban pipes (district heating) and huge industrial heat pumps that raise the temperature of the waste water to the 85-90 ºC necessary for the urban network. Europe, and especially the Nordic countries, are leading the adoption of these heat pumps, turning Finland into a full-scale laboratory for what the future of the continent could be. The risk of missing the technological train. Despite the promising outlook, Europe faces serious obstacles. As the Ember report warnsthe Old Continent invented geothermal electricity (the first plant was inaugurated in Larderello, Italy, in 1904), but now it risks giving up its leadership. As the United States and Canada scale commercially thanks to aggressive tax incentives (such as Inflation Reduction Act) and the private investment of the Big TechEurope is drowning in a morass of slow and complex permitting, inconsistent national support frameworks and a lack of financial risk mitigation for early phases of drilling. Up to 64%. If the EU does not channel innovation funds and simplify bureaucracy, supply chain and cost reduction will consolidate outside its borders. In fact, US research cited by Ember indicates that geothermal could cost-effectively cover up to 64% of the projected increase in electricity demand from US data centers by the early 2030s. The reward for doing things well is economic prosperity. As Czyzak recalls based on his experienceIceland in 1940 was 70% dependent on coal and was one of the poorest economies in the West; Today, thanks to a 100% clean electrical grid (30% geothermal, 70% hydroelectric), it attracted the aluminum industry and became the fifth country in the world in GDP per capita. Deep geothermal could be that same catalyst for countries like Hungary or Slovakia in the era of artificial intelligence. The earthly paradox of the cloud. In their eagerness not to stop the progress of their algorithms, giants like Google or Meta have understood that the solution is not just to look at the sky waiting for the sun to shine or the … Read more

Mining Bitcoin has always been an energetic black hole. Someone wants to turn it into your home heating

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The CES 2026 that has just closed its doors has confirmed an inescapable reality: Artificial Intelligence is everywhere, even where it seems to make no sense. From electronic LEGO bricks and wearables with roll-up screens, to more questionable devices like AI hair clippers that adjust the cut dynamically or digital frames that generate art by voice using GPT Image 1.5. Among this tide of “AI even in the soup”, a proposal has emerged that breaks with that trend and has surprised by its pragmatism: is it possible to get hot by mining Bitcoins? The answer is a resounding yes, and this year technology has shown that what was once a nuisance thermal waste is now a valuable household resource. ANDl income generating water heater. The American startup Superheat captured everyone’s attention with the presentation of its Superheat H1a water heater that uses ASIC (application specific integrated circuits) chips to heat a 190-liter tank while processing Bitcoin transactions. Unlike traditional electric water heaters, the H1 has an approximate price of $2,000, placing it 30-40% above the conventional market. However, as detailed in CNETwill be able to generate about $1,000 annually in passive income, always depending on the value of Bitcoin and the difficulty of the network. The science of “thermal reuse”. To understand this phenomenon, you have to turn to basic physics. The mining process requires intensive computational calculations (proof-of-work) that generate a massive amount of heat. Traditionally, this heat was expelled into the air using fans, but companies like Superheat have turned it around: mining is now the primary function and hot water is the secondary benefit. From the user’s point of view, the experience is seamless. The manual for devices like the Heatbit Trio reveals a control system sophisticated where the user can navigate the panel like a professional: Eco Mode: Heats exclusively by mining, limiting consumption to 400W. Target Mode: Combines the mining plate with a conventional heating element to maintain the desired temperature. Air purification: These devices not only heat, but act as purifiers with HEPA filters and air quality sensors (PM 2.5). Europe at the forefront. In the old continent, the proposal focuses on design and structural integration. From Austria, the company 21energy presents the Ofen 2a minimalist design radiator made of steel and aluminum. Unlike industrial miners that emit 75 decibels, this model is around 32-35 dB, being almost inaudible to the human ear. Furthermore, with a consumption of 1000 watts, it generates up to 40 TH/s of mining power, allowing users to recover part of their electricity bill while heating rooms of up to 50 m². On the other hand, in Switzerland, the company RY3T has marked a historic milestone. The RY3T ONE system has already been installed as the main heat source in a single-family house in the canton of Sankt Gallen. According to the companythis system can be more environmentally friendly than a conventional heat pump, as it reuses a computing power necessary for the global financial network instead of requiring additional electricity exclusively to generate thermal friction. A good idea or a technological chimera? Despite the enthusiasm, a report from Interesting Engineering raises critical questions that the consumer should consider: Obsolescence: What happens when mining hardware becomes obsolete? Will the entire heater or radiator have to be replaced? Network Cost: Even though heat is “free,” electricity for Bitcoin mining is often more expensive than natural gas in many countries. Regulation: If a country decided to ban Bitcoin mining, the user’s heating system could be legally compromised. From mining coins to processing Artificial Intelligence. As this report began, AI is the main protagonist of the moment, and its evolution will continue to be talked about far beyond cryptocurrencies. Julie Xu, COO of Superheat, explained at CES that the ultimate goal is to use this network of appliances for cloud solutions and AI inference. Instead of building gigantic data centers that stress the power grid and require massive cooling, homes could house small distributed computing units. However, this future poses a new dilemma: privacy. Experts from iFixit and Consumer Reports They already warn at this CES that “you don’t want a camera in front of your refrigerator watching you all the time” or a constant internet connection on simple devices, since it makes them more expensive to repair and prone to failure. The challenge will, therefore, be to balance the profitability of heating the home with the security of our private data. Image | freepik and heatbit Xataka | The bitcoin business cools down, but some miners have found a new vein: AI fever

The Earth has been providing heat for millions of years and now Google wants it for something very different from heating

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The race for artificial intelligence is no longer fought only in laboratories or chip factories. It is moving towards much more basic and, at the same time, more critical terrain: electricity. At a time when data centers are increasing their energy consumption and the electrical grid is beginning to show signs of saturation, an American geothermal startup has just closed one of the largest financing rounds in the sector. It is called Fervo Energy, it has raised $462 million and, among its investors, is Google. It is not just another financial movement. It is a clear sign of where big technology companies are looking to sustain their ambitions with artificial intelligence. First commercial project. The company has closed this financing in a Series E – one of the last phases of private investment before a possible IPO – aimed not at research, but at the deployment of large-scale energy infrastructure. The round, led by B Capital as lead investor, will serve to accelerate the construction of Cape Station, its geothermal plant in Utah, and advance the development of other projects. In other words, moving from technology demonstration to commercial production of firm electricity for the grid. In addition, the round has aroused the interest of a broad group of industrial, financial and technological investors. Among the new names are AllianceBernstein, Mitsui, Mitsubishi Heavy Industries, Breakthrough Energy Ventures and, especially significantly, Google. As reported by TechCrunchFervo has raised nearly $500 million in equity and debt in the last year alone, reflecting an unusual investment appetite for a technology that for decades was considered marginal. The Google entry. Fervo is not just a climate bet or an impact investment: it is a direct energy supplier for data centers. The company already maintains an agreement with Google to supply geothermal electricity to its facilities, something that turns the technology company into a client and investor at the same time. This move fits with a broader trend. The big tech companies they have stopped trusting only in the traditional electricity market. The explosion of generative AI has multiplied the demand for continuous, stable and emission-free energy, a profile that neither solar nor wind power alone can guarantee without massive battery backup. On the other hand, geothermal energy offers firm electricity 24 hours a day. How does the Fervo bet work? Fervo’s key It’s in your technology of Enhanced Geothermal Systems (EGS). Unlike traditional geothermal energy – which depends on natural hot aquifers – Fervo drills hot rock, injects water and creates artificial reservoirs that allow steam to be generated in a controlled manner. A direct adaptation of hydraulic fracturing and directional drilling techniques developed over decades by the oil and gas industry. It is no coincidence: many Fervo engineers come from that sector. The flagship project is Cape Station, located in Beaver County, Utah. According to the company’s planswill begin supplying 100 megawatts in 2026 and will reach 500 megawatts in 2028. One of the key factors is speed, as the company has drastically reduced the drilling time for its wells: from about a month in its first projects to a current average of about 15 days. As Sarah Jewett, senior vice president of strategy, explained, to TechCrunchapproximately half of the cost of a well depends on drilling time. Reducing it is synonymous with economic viability. AI as the engine of the new energy map. The rise of Fervo cannot be understood without the pressure that artificial intelligence puts on energy infrastructure. According to the International Energy Agencythe electrical consumption of data centers could double before 2030. An analysis by the Rhodium Group goes further and estimates that advanced geothermal could cover up to two thirds of new energy demand of these centers in the United States. Google is not alone in this race. The company is simultaneously exploring the reopening of nuclear plantsthe development of small modular reactors (SMR) and even experimental projects as solar-powered orbiting data centers. The logic is the same in all cases: ensure its own, stable, long-term electricity supply. In the words of the CEO of FervoTim Latimer: “There is a huge appetite to understand how the history of electricity demand is going to be resolved.” The answer, increasingly, lies in energy sources that previously seemed secondary. A sector that matters again. For years, geothermal energy was relegated to wind and solar energy. Today, United States live a true renaissance of the sector. The combination of new technologies, private capital, institutional support and demand from Big Tech is changing the landscape. Fervo is considered a pioneer within this new ecosystem. According to TechCrunchthe company is focused for now on the western United States, where the hot rock is closer to the surface, but does not rule out expanding to other states or abroad when its technology is even more optimized. The subsoil as a competitive advantage. While artificial intelligence is presented as the most ethereal technology of our time, its expansion depends on something deeply physical: constant, cheap and clean megawatts. In this context, Fervo represents more than just an energy startup: one more—but key—piece in the new infrastructure that supports the digital age. Google didn’t get here by chance. He has been exploring all possible avenues for some time to ensure stable power for his AI. And in that strategy of not closing any doors, while some look to the sky, others – like Fervo – look underground, kilometers underground, where the planet’s heat is beginning to emerge as one of the most solid responses. Image | FervoEnergy and freepik Xataka | The United States may win the AI ​​race, but its problem is different: China is winning all the others

In Finland they already know how to deal with excess heat from data centers: convert it into district heating

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Helsinki has found an unexpected ally to decarbonize its heating in the midst of the rise of artificial intelligence: waste heat from data centers. The same heat that servers generate when processing millions of queries, training AI models, or moving Internet traffic is no longer wasted. In the Finnish capital, this thermal flow – which is growing at the same rate as the digital world – is beginning to become shelter for tens of thousands of homes. A digital sector that is now heating up cities. For years, data centers were known for one uncomfortable characteristic: they generated a lot of heat and needed huge cooling systems to dissipate it. Now that residual heat is already being channeled to the Helsinki heating network, thanks to agreements signed with operators such as Equinix, Telia and Elisa. Data Center Dynamics remember that the company It has been testing this model for more than a decade – the first pilot tests date back to 2010 – but now the scale is completely different: the thermal demand of the city is enormous and the volume of heat generated by the digital economy is growing non-stop. The result can already be seen, a single data center can heat up to 20,000 homes, according to official figures from Helen. The Telia plant, for example, already recovers up to 90% of the heat generated by its servers, enough to heat 14,000 apartments, and in a few years it could double that figure to 28,000. A change in the way heat is produced. Digital heat recovery is more than just a technological curiosity. It represents a change in the way district heating is conceived. In the words of the Finnish company“the electricity consumed by data centers always ends up being converted into heat.” The difference is that now that heat is no longer released outside: it is reused. The engineering behind urban heat. Finland can convert digital heat into district heating because it has a network of district heating especially advanced: a network of pipes that distributes hot water to homes, schools and public buildings. The process is as follows. A data center generates heat: the servers run 24/7 and are continuously cooled. That heat, instead of being dissipated outside, is captured. It is then recovered and transferred; To do this, data centers can install their own recovery systems or use those offered by the energy company. The heat is sent to an “energy platform”, where heat pumps raise it to useful temperatures. Then, the temperature is adjusted to the 85–90 ºC necessary so that the water can circulate through the urban network. This is where high-temperature heat pumps come into play—some of which, like Patola’sthey work even with outside air at –20 ºC. Finally, the heat is injected into the grid and distributed throughout the city to heat thousands of buildings. Closing the energy circle. To understand why Finland leads this model, we must look at an essential technological element: heat pumps. Not only domestic ones, but also large-scale industrial ones, capable of raising waste heat to temperatures useful for an urban network. Europe—and especially the Nordic countries— has become a world leader of this technology. Finland has 524 heat pumps per 1,000 homes, a figure second only to Norway, and its cities have been electrifying heating for decades. This combination—cold climate, tradition of district heatingheat pump industry and the need to decarbonize quickly—turns Finland into an urban-scale energy laboratory. A model with limits. Although the system works, it is not a panacea. As Middle Parenthesis remembersnot all data centers are close to cores with thermal demand, not all generate enough heat to justify the investment, heat recovery improves efficiency but does not reduce the electrical consumption of data centers, and in hot climates or widely dispersed cities, replicating it is much more difficult. Still, the trend is clear. With the expansion of AI and the growth of cloudthe amount of heat available will only increase. The Nordic countries – Sweden, Norway, Denmark – already take advantage of it, and large operators such as Microsoft and Google They explore similar systems across Europe. From silicon to the stove. The Finnish model shows that, even at the heart of digital infrastructure – those data centers that power our online lives – there can be hidden a useful and concrete source of energy for everyday life. The heat produced by our searches, our videos or our conversations with AI can be transformed, with the right infrastructure, into heating a home in Helsinki. In a world desperately seeking clean heat, Finland has already found a tangible, scalable and surprisingly logical answer: turning the thermal problem of the digital age into a solution for the Nordic climate. A silent reminder that, sometimes, the energy transition advances with a simpler approach: taking advantage of the heat that servers already produce tirelessly. Image | freepik and freepik Xataka | Someone cut five undersea cables in the Baltic. Finland already points to a ship from the “shadow fleet” as responsible

This winter turning on the heating will be less scary. The reason is not so comforting

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Six in the afternoon. Closed night. You arrive in the cold and turn on the heating without thinking. The radiator breathes warmly and, next to it, last winter’s gas bill appears, folded between papers. One glance is enough to bring back the question that opens every coat season: how much will the joke cost this winter? The answer, after three harsh winters, seems somewhat kinder. But only in part. The present offers a respite, while beneath it continues to beat an energy contradiction that Europe has not been able to resolve. A kinder winter. Analysts confirm it: this winter will be more benign than previous ones. In an interview with Xataka, Javier RevueltaSenior Principal at AFRY, sums it up bluntly: “We have much cheaper gas than last winter. Before we were at €50–55/MWh; now we are around €30/MWh.” And that matters, because gas determines a good part of the electricity price in the cold months. According to Revuelta, this drop alone means “about €40/MWh less” in many hours of winter. It is worth remembering that this year has been a record for new solar power —more than 9 gigawatts installed— and everything points because this winter There will be more radiation and less cloudiness than the previous one. The result: more renewables pushing prices down. However, the Spanish system continues to show shadows. As we have already explained on other occasionsAfter the blackout on April 28, Red Eléctrica was forced to reinforce the operation of the synchronous plants—that is, the gas combined cycles—to avoid new surges. Between May and October, its production increased by more than 50%, generating an additional 2.5 million tons of CO₂. An uncomfortable reminder: even in the European country with the most renewables per inhabitant, gas remains the system’s safety net. How will it affect the pocket? The electricity consumer will notice a certain relaxation in their bills. More solar hours, less gas pressure and a more stable market mean a more predictable winter. For one thing, homes with gas heating will also see softer bills this winter. But the good news has a deadline. Starting in 2028, the new European ETS2which will force distribution companies to pay for the final consumer’s emissions. In practice: gas will be more expensive structurally. In fact, Revuelta anticipates it: “In the medium term, operating a boiler will be significantly more expensive,” and the comparison with heat pumps will clearly lean towards the electrification of heat. On the other hand, another adjustment is coming. As Cinco Días points outmarketers are carrying an additional 3.3 billion euros this year due to technical restrictions. They are not fully impacting it, but they will. Iberdrola anticipates that 70% of its free market clients will notice these costs when renewing rates in 2025; in 2027, it will be 90%. In other words, this winter it drops, but the rates in 2026 and 2027 might not be so benign. In search of alternatives. While gas experiences ups and downs and electricity continues to be marked by volatility, solid biomass—pellets, chips, olive pits—continues to be the most economical option in the country. According to the Biomass Price Indices collected by Heat and Cold, The average cost is: Sliver: 3.34 c€/kWh Bone: 4.68 c€/kWh Pellet: 6.95 c€/kWh Facing: TUR2 natural gas: 8.59 c€/kWh Diesel C: 7.98 c€/kWh Electricity (heat pump): > 10 c€/kWh useful Furthermore, prices remain stable and production is national, with more than 60 pellet factories and dozens of olive chip and stone centers. A close, robust market with little exposure to international tensions. There is a more modern alternative. Surely you have heard about it: aerothermal energy. To be honest, it is expensive to install—between 10,000 and 20,000 euros—but extremely efficient: for every unit of electricity it consumes, it provides between 3.5 and 4 units of heat. With more renewables pushing the rate downwards in solar hours and an ETS2 that will make gas more expensive, the heat pump becomes the most profitable option in 10–15 years. According to Revuelta, the economic difference will widen year after year and regulation will push in the same direction. But there is a lot of talk about green hydrogen… True, green hydrogen makes news, but it will not yet heat homes. The last thing that is known is that Enegás has received 285 applications to inject hydrogen into the network by blending. However, the current technical limit is 2% of the volume, insufficient for domestic heating. The first real injections will arrive in spring 2026, but they will be experimental. Hydrogen will not play a real role in residential heating until well into the 2030s. The tension in Europe. Spain arrives more comfortably into winter than northern Europe. But it is not isolated. As far as we know The regasification plants in the Netherlands operate at 90–100%, their technical limit. They are the main LNG gateway for Germany and part of the European industry. Its saturation is “the prelude to higher prices.” Spain could help, but it can’t. Interconnections with France barely allow shipping between 7,000 and 8,500 million m³ per year. Added to this is another structural factor. According to The Economistmore than 57% of the LNG that Europe imports already comes from the United States, which some analysts consider a new dependence comparable to that which existed with Russia. And, furthermore, the European Union enters winter with reserves at 83%, below the target of 90%. A calmer winter… But an uncertain future. This winter the radiators will turn on with less fear. Gas is cheaper, electricity is relaxed and biomass offers an economical way. Heat pumps are consolidated as the great alternative for the future, and hydrogen begins its journey—although without immediate impact for homes. But calm is relative. Spain—and Europe—are still trapped between two models: the one they want —decarbonized, electrified, flexible— and the one that really operates —dependent on gas, LNG and saturated infrastructure. This winter will be kinder, yes. But the underlying question for every Spaniard remains open: how much longer … Read more

Aerothermal energy is the heating of the future, but the electrical installation is stuck in the past

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“Winter is coming”, read the iconic phrase of the Stark family in Game of Thrones. There are less than two months until the official arrival of winter and, with it, the time to see how our energy bill trembles as much as we do. Search formulas to heat the house becomes prevalent in this final stretch of the year, especially when heating continues to be one of the main reasons why electricity consumption skyrockets. Every season new technological promises appear to maintain comfort without emptying your pocket, and aerothermal energy has become one of the most popular.But the key question arises: can all homes really benefit from it? The rise of aerothermal energy. This technology It works in a very simple way: Harnesses the energy already in the outside air to heat or cool the house and produce hot water. Instead of generating heat by burning gas or consuming large amounts of electricity, this system “extracts” it from the environment and multiplies it. In practice, this means that for every kilowatt of electricity it needs to operate, aerothermal energy can produce up to five of useful heat or cold. While a radiator or boiler converts energy into heat directly, aerothermal energy does something more intelligent: it extracts heat from the air and multiplies it. According to the architects consulted by Arquitectura y Diseño They calculate that, in a medium-sized home, this difference can translate into savings of up to 35% annually, as long as the house is well insulated and the climate is favorable. For the pocket, it translates into about 100 to 130 euros less on the annual bill. So aren’t all houses ready? Although it sounds like a perfect technology, architects warn that not all homes can take advantage of aerothermal energy on equal terms. In fact, there are multiple factors that reduce its effectiveness: the type of home, its insulation, the location and the specific energy needs. In Mediterranean climates, for example, where passive design allows thermal comfort to be achieved without active systems, “it does not make sense to use aerothermal energy as the main heating or cooling system.” In other words, installing aerothermal heating without previously evaluating the home can be like buying an electric car without having a plug at home. Experts in sustainable architecture insist that energy demand must first be reduced and housing optimized before betting on advanced technologies. The state of the electrical installations is another of the great brakes on the electrification of the residential park. The Observatory of Electrical Rehabilitation of Housing warns that 80% of the houses have technical deficiencies, and that only 22.4% were built after the 2002 Technical Regulation. This makes it clear that the majority of homes continue to depend on old networks, poorly prepared to assume new energy demands such as those required by aerothermal energy or solar self-consumption. The signs to know if your home is suitable. Before considering installing aerothermal, technicians recommend doing a prior evaluation. OK with the expertsthese are the main technical requirements: Have a ventilated outdoor space, free of obstacles, to place the outdoor unit. Have a modern electrical installation and sufficient contracted power. Check the thermal insulation and carpentry: without a good envelope, the efficiency of the system drops. Adapt the existing heating system (for example, replacing conventional radiators with underfloor heating). Carry out a climate feasibility study: in very cold or hot areas, you may need support from another system. In short, aerothermal energy is not installed, it is prepared. A well-insulated house with modern electrical installation can convert air into free energy; An old home, on the other hand, can make it an expense that is difficult to amortize. Furthermore, if it is found that the initial investment It can exceed 8,000 euros for an 80 m² apartment. What if it is combined with solar energy? Where aerothermal energy deploys its full potential it is when combined with photovoltaic solar energy. This synergy multiplies performance and reduces dependence on the electrical grid. The energy generated by the plates can power the heat pump, achieving an almost self-sufficient system with an emissions balance close to zero. Furthermore, it has already been applied in real projects such as Casa Gualba, designed by Slow Studiothis formula allows the production of up to 17 MWh per year thanks to the integration of tiles and photovoltaic panels on the roof. In short, aerothermal energy and solar energy form an efficient tandem, as long as the home is prepared for it. Efficiency, yes, but with preparation. Aerothermal energy is here to stay. It is a key piece on the path to decarbonized homes, especially now that the European Union banned at the beginning of the year subsidize gas boilers. But, like all technology, it only works well when the environment supports it. Investing in aerothermal energy without first checking the electrical installation, insulation or orientation of the home can translate into frustration rather than savings. For this reason, it is advisable to do a good check and thus the air can become our best ally against the cold. Image | FreePik and FreePik Xataka | Resolving one of the great debates in all kitchens: whether it consumes more to turn on the oven or the air fryer

The United Kingdom needs cheaper heating, so it is replacing gas boilers with Raspberry Pi servers

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The idea is eccentric, but makes sense. The light of the light is in the clouds. Gas boilers are condemned to extinguish. And the demand for computing capacity does not stop growing. The solution: replace the boilers with a cluster of 500 Raspberry Pi to generate heat. Mini -provenors in oil. UK Power Networks, the largest distribution networks in the United Kingdom, is testing to replace Traditional gas boilers with small data centers to the size of a heat pump. They consist of a 500 mini -proven rack Raspberry Pi cm4 either Cm5 submerged in oil. The oil is heated as computers work, and the heat is then distributed by radiators and the water of the house. A distributed cloud. These devices called “Heathub” are actually part of the Thermify distributed computing service. The company has completed a pilot test in Wales, and now hopes to climb the service to 100,000 facilities annually from here to 2030. Thermify believes that low -income families will be interested in Heathub to relieve their economic burden, reducing the electricity bill and avoiding the Aerothermia installation. Thanks to cloud income, the company can offer a cheap and low alternative in carbon emissions. How it works. Within each Heathub container, 500 Raspberry Pi modules work endlessly processing loads for the cloud service clients of Thermify. All this hardware is refrigerated by immersionwhat in this case has a double function, because it allows efficiently to capture the heat generated to use it as heating. The residual heat is transferred to the central and hot water system of the house, as a substitute “plug and play” of the conventional gas boiler. As for how it affects the Internet connection: not to reduce customer bandwidth, each unit has a dedicated network connection. Cheaper invoices. Why was someone to install an foreign data center at home? For the same reason that telephone antennas on the roofs of the buildings are installed: money. In this case, customers pay a fixed monthly fee of 5.60 pounds per month (about 6.60 euros), which reduces their bills by 40% without losing heating capacity. Beyond individual savings, the proposal of Thermify and UKPN makes sense from the environmental point of view: use energy twice, taking advantage of a heat that traditional data centers usually waste. Perhaps the greatest obstacle that thermify is facing is the competition. Other companies Like the French Qarnot and The British Heata either Deep Green They are already working on similar projects, heating from water deposits to public pools. Images | UKPN, Thermify In Xataka | The best way to heat the house: we analyze the spending and energy efficiency of heat pumps and heating

The appliance that consumes the most energy at home after heating: the water heater

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If you believe that everything that influences your electrical invoice is air conditioning or heating, think about it again. There is an appliance that is making a mella much more silently and that, probably, you had not noticed. In situation. In recent months, the price of electricity in Spain He has experienced fluctuations important, with a significant increase in January 2025. The electricity rate reached 68.41 euros per MWhreaching a quota that was only remembered three years ago. This increase is not accidental, since it is mainly due to the increase in the price in the wholesale electricity market and the return of the VAT to 21%. In addition, the Finish of the Iberian Exception In August 2024 it has contributed to this increase. However, the solution is not only to use less heating or turning off lights, which also, but certain appliances are raising the price of the light invoice. The one you least expected. The water heater You need a lot of energy To warm up, redundancy, large amounts of water. Despite having transformed people’s daily lives and facilitated domestic tasks, their use has inevitably increased energy consumption in homes. In data. To make it easier to understand, an average consumption per person is around 800kwh per year, so in a house of four people and a 200 -liter deposit we would be talking about spending an annual total of 3,200kwh. All this, monetarily translated would be about € 600 a year only by the water heater. How can we save? To start, you have to look at the things we do wrong, such as adjusting the temperature to very high levels that raise the price, as at 60 ° C or more, when in reality a temperature between 50 ° C and 55 ° C is more than enough. Also, regular maintenance must be carried out to avoid the accumulation of tartar in resistances. This accumulation hinders heat transmission, which forces the system to consume more energy to heat the water. Another advice is to take advantage of the lowest demand schedules, improve the insulation of the tank and opt for alternative systems such as heat pumps or thermal panels. These options can generate important long -term savings. The alternatives. The latest technologies mentioned are going to analyze them more carefully. On the one hand, The thermal energy that uses the solar radiation to heat waterwhich makes it an option for homes with sufficient sun exposure, allowing to reduce the dependence of electric heaters. On the other hand, aerothermia, which takes advantage of The energy contained in heating aircooling and hot water, has become popular for its high energy efficiency. However, these options have a fairly high initial investment plan, but over time they are profitable and contribute to reduce carbon emissions. Knowing how and why we use energy at home is important to save money and take better advantage of our appliances. In fact, the latter has transformed and improved our daily lives, but it is also important to be more aware of how we consume energy to take care of both our pocket and the environment. Image | Unspash Xataka | The best way to heat the house: we analyze the spending and energy efficiency of heat pumps and heating

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