{"id":47985,"date":"2025-05-15T14:07:38","date_gmt":"2025-05-15T13:07:38","guid":{"rendered":"https:\/\/ecoforest.com\/news\/geothermal-energy-installation-in-homes-complete-guide-2025-for-spain-portugal-and-italy\/"},"modified":"2025-05-15T14:07:40","modified_gmt":"2025-05-15T13:07:40","slug":"geothermal-energy-installation-in-homes-complete-guide-2025-for-spain-portugal-and-italy","status":"publish","type":"post","link":"https:\/\/ecoforest.com\/en\/news\/geothermal-energy-installation-in-homes-complete-guide-2025-for-spain-portugal-and-italy\/","title":{"rendered":"Geothermal Energy Installation in Homes: Complete Guide 2025 for Spain, Portugal and Italy"},"content":{"rendered":"\n<p>Geothermal energy is establishing itself as the leading sustainable climate control solution for single-family homes and residential buildings in southern Europe.<br\/> This system, which takes advantage of the stable temperature of the subsoil, offers energy efficiencies of 400-500% and reduces CO\u2082 emissions by up to 80% compared to conventional systems. In this guide, we analyse the key technical, regulatory and economic aspects for installations in Spain, Portugal and Italy, markets with optimal geological conditions and evolving regulatory frameworks.<br\/><\/p>\n\n<h2 class=\"wp-block-heading\" id=\"tipos-de-captacin-geotrmica-horizontal-vs-vertical\">Types of geothermal collection: horizontal vs. vertical<\/h2>\n\n<h2 class=\"wp-block-heading\">Vertical collection<\/h2>\n\n<p>Recommended for limited land areas, it requires drilling to a depth of 50-150 m, where the temperature remains stable between 10-15\u00b0C in the Iberian Peninsula and 12-18\u00b0C in northern Italy.<\/p>\n\n<ul class=\"wp-block-list\">\n<li><b>Advantages<\/b>: Greater efficiency (COP 4.5-5.2), less surface area required, useful life &gt;50 years.<\/li>\n\n\n\n<li><b>Cost<\/b>: \u00a370-120\/linear metre in Spain, \u00a385-130\/m in Italy, including geotechnical studies.<br\/><br\/>Example: House in Madrid (120 m\u00b2) with 2 boreholes of 100 m: \u00a318,000-21,000<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Horizontal collection<\/h2>\n\n<p>Ideal for large plots, with trenches 1.5-2 m deep.<\/p>\n\n<ul class=\"wp-block-list\">\n<li><b>Efficiency<\/b>: COP 3.8-4.3, sensitive to seasonal variations.<\/li>\n\n\n\n<li><b>Cost<\/b>: \u20ac30-50\/m\u00b2 in Portugal, \u20ac40-60\/m\u00b2 in Italian Alpine areas.<br\/><br\/>Example: House in Porto (200 m\u00b2) requires 600 m\u00b2 of land: \u20ac18,000-24,000.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"requisitos-previos-estudios-geolgicos-y-normativas\">Prerequisites: Geological Studies and Regulations<\/h2>\n\n<h2 class=\"wp-block-heading\">Mandatory Studies<\/h2>\n\n<ol class=\"wp-block-list\">\n<li><b>Exploratory survey<\/b>: Determines the thermal conductivity of the soil (\u20ac2,500-3,500 in Spain).<\/li>\n\n\n\n<li><b>Hydrogeological analysis<\/b>: Essential in open catchments to assess aquifer flow (required in Lombardy and Veneto, Italy).<\/li>\n\n\n\n<li><b>Administrative permits<\/b>:\n<ul class=\"wp-block-list\">\n<li>Spain: Responsible Declaration LD24.3 in Alcobendas.<\/li>\n\n\n\n<li>Portugal: DGEG licence for installations &gt;10 kW.<\/li>\n\n\n\n<li>Italy: Regional authorisation + landscape impact report in protected areas.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\" id=\"proceso-de-instalacin-paso-a-paso\">Step-by-step installation process<\/h2>\n\n<ol class=\"wp-block-list\">\n<li><b>System design<\/b>: Calculation of thermal load (50-70 W\/m\u00b2 in a Mediterranean climate).<\/li>\n\n\n\n<li><b>Water collection<\/b>:\n<ul class=\"wp-block-list\">\n<li>Vertical: Drilling with polyethylene U-shaped probe (diameter 140-160 mm).<\/li>\n\n\n\n<li>Horizontal: Trenches with spiral or coil pipes.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><b>Installation of <\/b><a href=\"https:\/\/ecoforest.com\/en\/heat-pumps\/ground-source-heat-pumps\/\"><b>heat pump<\/b><\/a>: 6-15 kW inverter equipment for homes of 100-300 m\u00b2.<\/li>\n\n\n\n<li><b>Connection to emitters<\/b>: Prioritise underfloor heating (35-40\u00b0C in winter) or low-temperature radiators.<\/li>\n<\/ol>\n\n<h2 class=\"wp-block-heading\" id=\"tiempos-de-instalacin-y-aspectos-legales\">Installation times and legal aspects<\/h2>\n\n<h2 class=\"wp-block-heading\">Estimated times<\/h2>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Process <\/th><th>Spain\/Portugal<\/th><th>Italy<\/th><\/tr><\/thead><tbody><tr><td>Geotechnical study<\/td><td>2-3 weeks<\/td><td>3-4 weeks<\/td><\/tr><tr><td>Vertical drilling<\/td><td>5-7 days<\/td><td>7-10 days<\/td><\/tr><tr><td>Complete installation<\/td><td>3-4 weeks<\/td><td>4-6 weeks<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<h2 class=\"wp-block-heading\">Cross-border legal framework<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><b>Spain<\/b>: RD 178\/2025 on energy storage applicable to hybrid systems<a href=\"https:\/\/geotermiaonline.com\/14152\/tenerife-pide-a-moncloa-regular-la-energia-geotermica\/\" rel=\"nofollow noopener\" target=\"_blank\">7<\/a><a href=\"https:\/\/energiaestrategica.es\/portugal-agiliza-tramitaciones-almacenamiento\/\" rel=\"nofollow noopener\" target=\"_blank\">9<\/a>.<\/li>\n\n\n\n<li><b>Portugal<\/b>: Decree-Law 15\/2022 streamlines licences for geothermal energy in existing buildings<a href=\"https:\/\/energiaestrategica.es\/portugal-agiliza-tramitaciones-almacenamiento\/\" rel=\"nofollow noopener\" target=\"_blank\">9<\/a><a href=\"https:\/\/www.piensageotermia.com\/se-establece-una-nueva-gran-red-de-calefaccion-de-distrito-geotermica-en-chaves-portugal\/\" rel=\"nofollow noopener\" target=\"_blank\">15<\/a>.<\/li>\n\n\n\n<li><b>Italy<\/b>: 65% incentives in the \u2018Ecobonus\u2019 for renovations with geothermal energy<a href=\"https:\/\/geotermiaonline.com\/1713\/369-municipios-italianos-disponen-de-equipamientos-geotermicos\/\" rel=\"nofollow noopener\" target=\"_blank\">16<\/a>.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"costes-detallados-por-metro-cuadrado\">Detailed costs per square metre<\/h2>\n\n<h2 class=\"wp-block-heading\">Comparative table 2025 (VAT not included)<\/h2>\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Country <\/th><th>Vertical collection<\/th><th>Horizontal collection<\/th><th>With underfloor heating<\/th><\/tr><\/thead><tbody><tr><td>Spain<\/td><td>142-178 \u20ac\/m\u00b2<\/td><td>110-135 \u20ac\/m\u00b2<\/td><td>+28%<\/td><\/tr><tr><td>Portugal<\/td><td>130-160 \u20ac\/m\u00b2<\/td><td>95-120 \u20ac\/m\u00b2<\/td><td>+25%<\/td><\/tr><tr><td>Italy<\/td><td>150-190 \u20ac\/m\u00b2<\/td><td>115-145 \u20ac\/m\u00b2<\/td><td>+30%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<p>Practical example:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><b>House in Lisbon (150 m\u00b2)<\/b>:\n<ul class=\"wp-block-list\">\n<li>Vertical collection + underfloor heating: \u00a320.856<\/li>\n\n\n\n<li>PT 2025 subsidy: -\u00a35.224<\/li>\n\n\n\n<li>Payback period: 6.8 years<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"casos-prcticos-en-diferentes-tipologas\">Practical examples in different types of buildings<\/h2>\n\n<h2 class=\"wp-block-heading\">1. Renovation of a historic building (Seville, Spain)<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><b>Challenge<\/b>: Structural limitations for drilling.<\/li>\n\n\n\n<li><b>Solution<\/b>: Horizontal collection in a 400 m\u00b2 garden + 9 kW heat pump.<\/li>\n\n\n\n<li><b>Result<\/b>: 68% savings on air conditioning (from \u00a32.359\/year to \u00a37.584)<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">2. Alpine Single-Family Home (Trentino, Italy)<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><b>Conditions<\/b>: Outdoor temperatures down to -15\u00b0C.<\/li>\n\n\n\n<li><b>System<\/b>: 3 vertical boreholes of 180 m + underfloor heating.<\/li>\n\n\n\n<li><b>Efficiency<\/b>: COP 4.8 even at -10\u00b0C.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">3. Housing development in Porto (Portugal)<\/h2>\n\n<ul class=\"wp-block-list\">\n<li><b>Scale<\/b>: 20 homes with a community geothermal network.<\/li>\n\n\n\n<li><b>Technology<\/b>: Open collection in an aquifer at a constant 12\u00b0C.<\/li>\n\n\n\n<li><ul>&#13;\n \t<li><b>Benefits<\/b>: Shared cost reduced to \u00a37.162 per home.<\/li>&#13;\n<\/ul><\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\" id=\"tendencias-2025-y-recomendaciones\">2025 trends and recommendations<\/h2>\n\n<ol class=\"wp-block-list\">\n<li><b>Hybridisation with photovoltaics<\/b>: Systems such as Ecoforest Geo+Solar achieve 85% autonomy.<\/li>\n\n\n\n<li><b>Active cooling<\/b>: Reversible heat pumps enable comprehensive climate control.<\/li>\n\n\n\n<li><b>IoT monitoring<\/b>: Real-time performance sensors optimise COP.<\/li>\n<\/ol>\n\n<p>For projects in Italy, consider the \u2018Superbonus 110%\u2019 for combined energy-efficient installations. In Portugal, the Environmental Fund finances up to 30% of community projects. Geothermal energy is thus positioned as a key investment in the residential energy transition in southern Europe.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Geothermal energy is establishing itself as the leading sustainable climate control solution for single-family homes and residential buildings in southern Europe. This system, which takes advantage of the stable temperature of the subsoil, offers energy efficiencies of 400-500% and reduces CO\u2082 emissions by up to 80% compared to conventional systems. In this guide, we analyse [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":46448,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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cracks","author_link":"https:\/\/ecoforest.com\/en\/author\/seo-funnel-cracks\/"},"comment_info":0,"category_info":[{"term_id":68,"name":"Blog","slug":"news","term_group":0,"term_taxonomy_id":68,"taxonomy":"category","description":"","parent":0,"count":196,"filter":"raw","cat_ID":68,"category_count":196,"category_description":"","cat_name":"Blog","category_nicename":"news","category_parent":0},{"term_id":89,"name":"Geothermal","slug":"ground-source-heat-pumps","term_group":0,"term_taxonomy_id":89,"taxonomy":"category","description":"","parent":114,"count":14,"filter":"raw","cat_ID":89,"category_count":14,"category_description":"","cat_name":"Geothermal","category_nicename":"ground-source-heat-pumps","category_parent":114}],"tag_info":false,"taxonomy_info":{"category":[{"value":68,"label":"Blog"},{"value":89,"label":"Geothermal"}]},"_links":{"self":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts\/47985","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/comments?post=47985"}],"version-history":[{"count":1,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts\/47985\/revisions"}],"predecessor-version":[{"id":47986,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts\/47985\/revisions\/47986"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/media\/46448"}],"wp:attachment":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/media?parent=47985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/categories?post=47985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/tags?post=47985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}